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Change Log

Version 3.2.0

Release Date: Not Released

  • General Changes
  • Core
    • Added a $config['log_file'] option.
    • Removed $config['log_file_extension'].
    • Removed $config['rewrite_short_tags'] (irrelevant on PHP 5.4+).
    • Removed previously deprecated $config['global_xss_filtering'].
    • Removed previously deprecated :doc:`Routing Class <general/routing>` methods fetch_directory(), fetch_class() and fetch_method() (use the respective class properties instead).
    • Removed previously deprecated :doc:`Config Library <libraries/config>` method system_url() (encourages insecure practices).
    • Changed :doc:`URI Library <libraries/uri>` to ignore the $config['url_suffix'], $config['permitted_uri_chars'] configuration settings for CLI requests.
    • Changed :doc:`Loader <libraries/loader>` method model() to always check if the loaded class extends CI_Model.
    • Changed :doc:`Output Library <libraries/output>` method _display() default parameter value to NULL instead of empty string.
    • :doc:`Input Library <libraries/input>` changes include:
      • Removed previously deprecated $config['allow_get_array'].
      • Removed previously deprecated $config['standardize_newlines'].
      • Removed previously deprecated method is_cli_request() (use :php:func:`is_cli()` instead).
      • Changed the set_cookie() method's default expiry time to 0 (expires when browser is closed).
      • Changed the set_cookie() method to delete the cookie if a negative expiry time is passed to it.
      • Allowed usage of nested array keys in get_post(), post_get() methods.
  • Libraries
    • Removed previously deprecated Encrypt Library.
    • Removed previously deprecated Cart Library.
    • Removed previously deprecated Javascript Library (it was always experimental in the first place).
    • Removed previously deprecated anchor_class option from :doc:`Pagination Library <libraries/pagination>`.
    • Added TLS and UNIX socket connection support to :doc:`Session Library <libraries/sessions>` 'redis' driver.
    • Updated :doc:`ZIP Library <libraries/zip>` method read_dir() to include hidden (dot-prefixed) files.
    • :doc:`Cache Library <libraries/caching>` changes include:
      • Added 'apcu' driver.
      • Added UNIX socket connection support to the 'memcached' driver.
      • Added 'database' configuration option to the 'redis' driver, allowing to auto-select another database.
      • Added method get_loaded_driver() to return the currently used driver.
      • Changed the 'memcached' driver to ignore configurations that don't specify a hostname.
      • Removed the socket_type configuration setting from the 'redis' driver.
      • Changed data serialization logic in 'redis' driver for better performance.
    • :doc:`Form Validation Library <libraries/form_validation>` changes include:
      • Removed previously deprecated method prep_for_form() / rule prep_for_form.
      • Removed previously deprecated ability to use language translations without the 'form_validation_' prefix.
      • Changed method set_rules() to throw a BadMethodCallException when its first parameter is not an array and the $rules one is unused.
      • Added rule valid_mac, which replicates PHP's native filter_var() with FILTER_VALIDATE_MAC.
      • Added ability to validate entire arrays at once, if is_array is within the list of rules.
      • Added ability to fetch processed data via a second parameter to run().
    • :doc:`HTML Table Library <libraries/table>` changes include:
      • Changed method clear() to also reset captions.
    • :doc:`Email Library <libraries/email>` changes include:
      • Changed the default value of the validate option to TRUE.
      • Changed the send() method to always return TRUE when sending multiple batches of emails.
    • :doc:`Image Manipulation Library <libraries/image_lib>` changes include:
      • Added option to change the output filename via the new_name option when rendering images with dynamic_output.
      • Updated to serve multibyte filenames when rendering images with dynamic_output, if possible.
      • Added WebP image support.
  • :doc:`Database <database/index>` changes include:
    • Removed the option to disable the :doc:`Query Builder <database/query_builder>`.
    • Removed driver-specific $curs_id property and get_cursor(), stored_procedure() methods from OCI8 driver.
    • Removed previously deprecated 'sqlite' driver (used for SQLite version 2; no longer shipped with PHP 5.4+).
    • Removed method db_set_charset() and the ability to change a connection character set at runtime.
    • Changed method initialize() to return void and instead throw a RuntimeException in case of failure.
    • Changed method db_connect() to always set the connection character set (if supported by the driver) and to fail if it can't.
    • :doc:`Database Forge <database/forge>`:
      • Added support for declaring date/time type fields default values as CURRENT_TIMESTAMP and similar.
      • Removed previously deprecated $_after parameter for add_column().
    • :doc:`Query Builder <database/query_builder>`:
      • Added methods having_in(), or_having_in(), not_having_in(), or_not_having_in().
      • Updated methods where_in(), or_where_in(), not_where_in(), or_not_where_in() to reject non-array inputs for the second parameter.
      • Updated method join() to allow accepting NATURAL clauses in its third parameter.
      • Updated logic to allow dots in alias names.
  • Helpers

Bug fixes for 3.2.0

Version 3.1.13

Release Date: Mar 3, 2022

Bug fixes for 3.1.13

Version 3.1.12

Release Date: Mar 3, 2022

Bug fixes for 3.1.12

Version 3.1.11

Release Date: Sep 19, 2019

Bug fixes for 3.1.11

Version 3.1.10

Release Date: Jan 16, 2019

Bug fixes for 3.1.10

Version 3.1.9

Release Date: Jun 12, 2018

Bug fixes for 3.1.9

Version 3.1.8

Release Date: Mar 22, 2018

Bug fixes for 3.1.8

Version 3.1.7

Release Date: Jan 13, 2018

Bug fixes for 3.1.7

Version 3.1.6

Release Date: Sep 25, 2017

Bug fixes for 3.1.6

Version 3.1.5

Release Date: Jun 19, 2017

Bug fixes for 3.1.5

Version 3.1.4

Release Date: Mar 20, 2017

Bug fixes for 3.1.4

Version 3.1.3

Release Date: Jan 09, 2017

Bug fixes for 3.1.3

Version 3.1.2

Release Date: Oct 28, 2016

  • Security
  • General Changes
    • Allowed PHP 4-style constructors (Matching_name::Matching_name() methods) to be used as routes, if there's a __construct() to override them.

Bug fixes for 3.1.2

Version 3.1.1

Release Date: Oct 22, 2016

Bug fixes for 3.1.1

Version 3.1.0

Release Date: July 26, 2016

Bug fixes for 3.1.0

Version 3.0.6

Release Date: March 21, 2016

Bug fixes for 3.0.6

Version 3.0.5

Release Date: March 11, 2016

Bug fixes for 3.0.5

Version 3.0.4

Release Date: January 13, 2016

Bug fixes for 3.0.4

Version 3.0.3

Release Date: October 31, 2015

Bug fixes for 3.0.3

Version 3.0.2

Release Date: October 8, 2015

Bug fixes for 3.0.2

Version 3.0.1

Release Date: August 7, 2015

Bug fixes for 3.0.1

Version 3.0.0

Release Date: March 30, 2015

  • License
    • CodeIgniter has been relicensed with the MIT License, eliminating its old proprietary licensing.
  • General Changes
    • PHP 5.1.6 is no longer supported. CodeIgniter now requires PHP 5.2.4 and recommends PHP 5.4+ or newer to be used.
    • Changed filenaming convention (class file names now must be Ucfirst and everything else in lowercase).
    • Changed the default database driver to 'mysqli' (the old 'mysql' driver is DEPRECATED).
    • $_SERVER['CI_ENV'] can now be set to control the ENVIRONMENT constant.
    • Added an optional backtrace to php-error template.
    • Added Android to the list of user agents.
    • Added Windows 7, Windows 8, Windows 8.1, Android, Blackberry, iOS and PlayStation 3 to the list of user platforms.
    • Added Fennec (Firefox for mobile) to the list of mobile user agents.
    • Ability to log certain error types, not all under a threshold.
    • Added support for pem, p10, p12, p7a, p7c, p7m, p7r, p7s, crt, crl, der, kdb, rsa, cer, sst, csr Certs to mimes.php.
    • Added support for pgp, gpg, zsh and cdr files to mimes.php.
    • Added support for 3gp, 3g2, mp4, wmv, f4v, vlc Video files to mimes.php.
    • Added support for m4a, aac, m4u, xspf, au, ac3, flac, ogg, wma Audio files to mimes.php.
    • Added support for kmz and kml (Google Earth) files to mimes.php.
    • Added support for ics Calendar files to mimes.php.
    • Added support for rar, jar and 7zip archives to mimes.php.
    • Updated support for xml ('application/xml') and xsl ('application/xml', 'text/xsl') files in mimes.php.
    • Updated support for doc files in mimes.php.
    • Updated support for docx files in mimes.php.
    • Updated support for php files in mimes.php.
    • Updated support for zip files in mimes.php.
    • Updated support for csv files in mimes.php.
    • Added Romanian, Greek, Vietnamese and Cyrilic characters in application/config/foreign_characters.php.
    • Changed logger to only chmod when file is first created.
    • Removed previously deprecated SHA1 Library.
    • Removed previously deprecated use of $autoload['core'] in application/config/autoload.php. Only entries in $autoload['libraries'] are auto-loaded now.
    • Removed previously deprecated EXT constant.
    • Updated all classes to be written in PHP 5 style, with visibility declarations and no var usage for properties.
    • Added an Exception handler.
    • Moved error templates to application/views/errors/ and made the path configurable via $config['error_views_path'].
    • Added support non-HTML error templates for CLI applications.
    • Moved the Log class to application/core/
    • Global config files are loaded first, then environment ones. Environment config keys overwrite base ones, allowing to only set the keys we want changed per environment.
    • Changed detection of $view_folder so that if it's not found in the current path, it will now also be searched for under the application folder.
    • Path constants BASEPATH, APPPATH and VIEWPATH are now (internally) defined as absolute paths.
    • Updated email validation methods to use filter_var() instead of PCRE.
    • Changed environment defaults to report all errors in development and only fatal ones in testing, production but only display them in development.
    • Updated ip_address database field lengths from 16 to 45 for supporting IPv6 address on :doc:`Trackback Library <libraries/trackback>` and :doc:`Captcha Helper <helpers/captcha_helper>`.
    • Removed cheatsheets and quick_reference PDFs from the documentation.
    • Added availability checks where usage of dangerous functions like eval() and exec() is required.
    • Added support for changing the file extension of log files using $config['log_file_extension'].
    • Added support for turning newline standardization on/off via $config['standardize_newlines'] and set it to FALSE by default.
    • Added configuration setting $config['composer_autoload'] to enable loading of a Composer auto-loader.
    • Removed the automatic conversion of 'programmatic characters' to HTML entities from the :doc:`URI Library <libraries/uri>`.
    • Changed log messages that say a class or file was loaded to "info" level instead of "debug", so that they don't pollute log files when $config['log_threshold'] is set to 2 (debug).
  • Helpers
  • Database
    • DEPRECATED the 'mysql', 'sqlite', 'mssql' and 'pdo/dblib' (also known as 'pdo/mssql' or 'pdo/sybase') drivers.
    • Added dsn configuration setting for drivers that support DSN strings (PDO, PostgreSQL, Oracle, ODBC, CUBRID).
    • Added schema configuration setting (defaults to public) for drivers that might need it (currently used by PostgreSQL and ODBC).
    • Added save_queries configuration setting to application/config/database.php (defaults to TRUE).
    • Removed autoinit configuration setting as it doesn't make sense to instantiate the database class but not connect to the database.
    • Added subdrivers support (currently only used by PDO).
    • Added an optional database name parameter to db_select().
    • Removed protect_identifiers() and renamed internal method _protect_identifiers() to it instead - it was just an alias.
    • Renamed internal method _escape_identifiers() to escape_identifiers().
    • Updated escape_identifiers() to accept an array of fields as well as strings.
    • MySQL and MySQLi drivers now require at least MySQL version 5.1.
    • Added a $persistent parameter to db_connect() and changed db_pconnect() to be an alias for db_connect(TRUE).
    • db_set_charset() now only requires one parameter (collation was only needed due to legacy support for MySQL versions prior to 5.1).
    • db_select() will now always (if required by the driver) be called by db_connect() instead of only when initializing.
    • Replaced the _error_message() and _error_number() methods with error(), which returns an array containing the last database error code and message.
    • Improved version() implementation so that drivers that have a native function to get the version number don't have to be defined in the core DB_driver class.
    • Added capability for packages to hold config/database.php config files.
    • Added MySQL client compression support.
    • Added encrypted connections support (for mysql, sqlsrv and PDO with sqlsrv).
    • Removed :doc:`Loader Class <libraries/loader>` from Database error tracing to better find the likely culprit.
    • Added support for SQLite3 database driver.
    • Added Interbase/Firebird database support via the ibase driver.
    • Added ODBC support for create_database(), drop_database() and drop_table() in :doc:`Database Forge <database/forge>`.
    • Added support to binding arrays as IN() sets in query().
    • :doc:`Query Builder <database/query_builder>` changes include:
      • Renamed the Active Record class to Query Builder to remove confusion with the Active Record design pattern.
      • Added the ability to insert objects with insert_batch().
      • Added new methods that return the SQL string of queries without executing them: get_compiled_select(), get_compiled_insert(), get_compiled_update(), get_compiled_delete().
      • Added an optional parameter that allows to disable escaping (useful for custom fields) for methods join(), order_by(), where_in(), or_where_in(), where_not_in(), or_where_not_in(), insert(), insert_batch().
      • Added support for join() with multiple conditions.
      • Added support for USING in join().
      • Added support for EXISTS in where().
      • Added seed values support for random ordering with order_by(seed, 'RANDOM').
      • Changed limit() to ignore NULL values instead of always casting to integer.
      • Changed offset() to ignore empty values instead of always casting to integer.
      • Methods insert_batch() and update_batch() now return an integer representing the number of rows affected by them.
      • Methods where(), or_where(), having() and or_having() now convert trailing = and <>, != SQL operators to IS NULL and IS NOT NULL respectively when the supplied comparison value is NULL.
      • Added method chaining support to reset_query(), start_cache(), stop_cache() and flush_cache().
      • Added an optional second parameter to count_all_results() to disable resetting of QB values.
    • :doc:`Database Results <database/results>` changes include:
      • Added a constructor to the DB_result class and moved all driver-specific properties and logic out of the base DB_driver class to allow better abstraction.
      • Added method unbuffered_row() for fetching a row without prefetching the whole result (consume less memory).
      • Renamed former method _data_seek() to data_seek() and made it public.
    • Improved support for the MySQLi driver, including:
      • OOP style usage of the PHP extension is now used, instead of the procedural aliases.
      • Server version checking is now done via mysqli::$server_info instead of running an SQL query.
      • Added persistent connections support for PHP >= 5.3.
      • Added support for configuring socket pipe connections.
      • Added support for backup() in :doc:`Database Utilities <database/utilities>`.
      • Changed methods trans_begin(), trans_commit() and trans_rollback() to use the PHP API instead of sending queries.
    • Improved support of the PDO driver, including:
    • Improved support of the PostgreSQL driver, including:
      • pg_version() is now used to get the database version number, when possible.
      • Added db_set_charset() support.
      • Added support for optimize_table() in :doc:`Database Utilities <database/utilities>` (rebuilds table indexes).
      • Added boolean data type support in escape().
      • Added update_batch() support.
      • Removed limit() and order_by() support for UPDATE and DELETE queries as PostgreSQL does not support those features.
      • Added a work-around for dead persistent connections to be re-created after a database restart.
      • Changed db_connect() to include the (new) schema value into Postgre's search_path session variable.
      • pg_escape_literal() is now used for escaping strings, if available.
    • Improved support of the CUBRID driver, including:
    • Improved support of the MSSQL and SQLSRV drivers, including:
      • Added random ordering support.
      • Added support for optimize_table() in :doc:`Database Utility <database/utilities>`.
      • Added escaping with QUOTE_IDENTIFIER setting detection.
      • Added port handling support for UNIX-based systems (MSSQL driver).
      • Added OFFSET support for SQL Server 2005 and above.
      • Added db_set_charset() support (MSSQL driver).
      • Added a scrollable property to enable configuration of the cursor to use (SQLSRV driver).
      • Added support and auto-detection for the SQLSRV_CURSOR_CLIENT_BUFFERED scrollable cursor flag (SQLSRV driver).
      • Changed default behavior to not use SQLSRV_CURSOR_STATIC due to performance issues (SQLSRV driver).
    • Improved support of the Oracle (OCI8) driver, including:
    • Improved support of the SQLite driver, including:
    • :doc:`Database Forge <database/forge>` changes include:
      • Added an optional second parameter to drop_table() that allows adding the IF EXISTS condition, which is no longer the default.
      • Added support for passing a custom database object to the loader.
      • Added support for passing custom table attributes (such as ENGINE for MySQL) to create_table().
      • Added support for usage of the FIRST clause in add_column() for MySQL and CUBRID.
      • Added partial support for field comments (MySQL, PostgreSQL, Oracle).
      • Deprecated add_column()'s third method. AFTER clause should now be added to the field definition array instead.
      • Overall improved support for all of the drivers.
    • :doc:`Database Utility <database/utilities>` changes include:
      • Added support for passing a custom database object to the loader.
      • Modified the class to no longer extend :doc:`Database Forge <database/forge>`, which has been a deprecated behavior for awhile.
      • Overall improved support for all of the drivers.
      • Added foreign_key_checks option to MySQL/MySQLi backup, allowing statement to disable/re-enable foreign key checks to be inserted into the backup output.
  • Libraries
    • Added a new :doc:`Encryption Library <libraries/encryption>` to replace the old, largely insecure Encrypt Library.
    • Encrypt Library changes include:
    • :doc:`Session Library <libraries/sessions>` changes include:
      • Completely re-written the library to use self-contained drivers via $config['sess_driver'].
      • Added 'files', 'database', 'redis' and 'memcached' drivers (using 'files' by default).
      • Added $config['sess_save_path'] setting to specify where the session data is stored, depending on the driver.
      • Dropped support for storing session data in cookies (which renders $config['sess_encrypt_cookie'] useless and is therefore also removed).
      • Dropped official support for storing session data in databases other than MySQL and PostgreSQL.
      • Changed table structure for the 'database' driver.
      • Added a new tempdata feature that allows setting userdata items with expiration time (mark_as_temp(), tempdata(), set_tempdata(), unset_tempdata()).
      • Changed method keep_flashdata() to also accept an array of keys.
      • Changed methods userdata(), flashdata() to return an array of all userdata/flashdata when no parameter is passed.
      • Deprecated method all_userdata() - it is now just an alias for userdata() with no parameters.
      • Added method has_userdata() that verifies the existence of a userdata item.
      • Added debug level log messages for key events in the session validation process.
      • Dropped support for the sess_match_useragent option.
    • :doc:`File Uploading Library <libraries/file_uploading>` changes include:
      • Added method chaining support.
      • Added support for using array notation in file field names.
      • Added max_filename_increment and file_ext_tolower configuration settings.
      • Added min_width and min_height configuration settings for images.
      • Added mod_mime_fix configuration setting to disable suffixing multiple file extensions with an underscore.
      • Added the possibility pass allowed_types as an array.
      • Added an $index parameter to the method data().
      • Added a $reset parameter to method initialize().
      • Removed method clean_file_name() and its usage in favor of :doc:`Security Library <libraries/security>`'s sanitize_filename().
      • Removed method mimes_types().
      • Changed CI_Upload::_prep_filename() to simply replace all (but the last) dots in the filename with underscores, instead of suffixing them.
    • :doc:`Calendar Library <libraries/calendar>` changes include:
      • Added method chaining support.
      • Added configuration to generate days of other months instead of blank cells.
      • Added auto-configuration for next_prev_url if it is empty and show_prev_next is set to TRUE.
      • Added support for templating via an array in addition to the encoded string.
      • Changed method get_total_days() to be an alias for :doc:`Date Helper <helpers/date_helper>` :php:func:`days_in_month()`.
    • Cart Library changes include:
      • Deprecated the library as too specific for CodeIgniter.
      • Added method remove() to remove a cart item, updating with quantity of 0 seemed like a hack but has remained to retain compatibility.
      • Added method get_item() to enable retrieving data for a single cart item.
      • Added unicode support for product names.
      • Added support for disabling product name strictness via the $product_name_safe property.
      • Changed insert() method to auto-increment quantity for an item when inserted twice instead of resetting it.
      • Changed update() method to support updating all properties attached to an item and not to require 'qty'.
    • :doc:`Image Manipulation Library <libraries/image_lib>` changes include:
      • The initialize() method now only sets existing class properties.
      • Added support for 3-length hex color values for wm_font_color and wm_shadow_color properties, as well as validation for them.
      • Class properties wm_font_color, wm_shadow_color and wm_use_drop_shadow are now protected, to avoid breaking the text_watermark() method if they are set manually after initialization.
      • If property maintain_ratio is set to TRUE, image_reproportion() now doesn't need both width and height to be specified.
      • Property maintain_ratio is now taken into account when resizing images using ImageMagick library.
      • Added support for maintaining transparency for PNG images when watermarking.
      • Added a file_permissions setting.
    • :doc:`Form Validation Library <libraries/form_validation>` changes include:
      • Added method error_array() to return all error messages as an array.
      • Added method set_data() to set an alternative data array to be validated instead of the default $_POST.
      • Added method reset_validation() which resets internal validation variables in case of multiple validation routines.
      • Added support for setting error delimiters in the config file via $config['error_prefix'] and $config['error_suffix'].
      • Internal method _execute() now considers input data to be invalid if a specified rule is not found.
      • Removed method is_numeric() as it exists as a native PHP function and _execute() will find and use that (the is_numeric rule itself is deprecated since 1.6.1).
      • Native PHP functions used as rules can now accept an additional parameter, other than the data itself.
      • Updated method set_rules() to accept an array of rules as well as a string.
      • Fields that have empty rules set no longer run through validation (and therefore are not considered erroneous).
      • Added rule differs to check if the value of a field differs from the value of another field.
      • Added rule valid_url.
      • Added rule in_list to check if the value of a field is within a given list.
      • Added support for named parameters in error messages.
      • :doc:`Language <libraries/language>` line keys must now be prefixed with form_validation_.
      • Added rule alpha_numeric_spaces.
      • Added support for custom error messages per field rule.
      • Added support for callable rules when they are passed as an array.
      • Added support for non-ASCII domains in valid_email rule, depending on the Intl extension.
      • Changed the debug message about an error message not being set to include the rule name it is about.
    • :doc:`Caching Library <libraries/caching>` changes include:
      • Added Wincache driver.
      • Added Redis driver.
      • Added a key_prefix option for cache IDs.
      • Updated driver is_supported() methods to log at the "debug" level.
      • Added option to store raw values instead of CI-formatted ones (APC, Memcache).
      • Added atomic increment/decrement feature via increment(), decrement().
    • :doc:`E-mail Library <libraries/email>` changes include:
      • Added a custom filename parameter to attach() as $this->email->attach($filename, $disposition, $newname).
      • Added possibility to send attachment as buffer string in attach() as $this->email->attach($buffer, $disposition, $newname, $mime).
      • Added possibility to attach remote files by passing a URL.
      • Added method attachment_cid() to enable embedding inline attachments into HTML.
      • Added dsn (delivery status notification) option.
      • Renamed method _set_header() to set_header() and made it public to enable adding custom headers.
      • Successfully sent emails will automatically clear the parameters.
      • Added a return_path parameter to the from() method.
      • Removed the second parameter (character limit) from internal method _prep_quoted_printable() as it is never used.
      • Internal method _prep_quoted_printable() will now utilize the native quoted_printable_encode(), imap_8bit() functions (if available) when CRLF is set to "rn".
      • Default charset now relies on the global $config['charset'] setting.
      • Removed unused protected method _get_ip() (:doc:`Input Library <libraries/input>`'s ip_address() should be used anyway).
      • Internal method _prep_q_encoding() now utilizes PHP's mbstring and iconv extensions (when available) and no longer has a second ($from) argument.
      • Added an optional parameter to print_debugger() to allow specifying which parts of the message should be printed ('headers', 'subject', 'body').
      • Added SMTP keepalive option to avoid opening the connection for each send() call. Accessible as $smtp_keepalive.
      • Public method set_header() now filters the input by removing all "\r" and "\n" characters.
      • Added support for non-ASCII domains in valid_email(), depending on the Intl extension.
    • :doc:`Pagination Library <libraries/pagination>` changes include:
      • Deprecated usage of the "anchor_class" setting (use the new "attributes" setting instead).
      • Added method chaining support to initialize() method.
      • Added support for the anchor "rel" attribute.
      • Added support for setting custom attributes.
      • Added support for language translations of the first_link, next_link, prev_link and last_link values.
      • Added support for $config['num_links'] = 0 configuration.
      • Added $config['reuse_query_string'] to allow automatic repopulation of query string arguments, combined with normal URI segments.
      • Added $config['use_global_url_suffix'] to allow overriding the library 'suffix' value with that of the global $config['url_suffix'] setting.
      • Removed the default &nbsp; from a number of the configuration variables.
    • :doc:`Profiler Library <general/profiling>` changes include:
      • Database object names are now being displayed.
      • The sum of all queries running times in seconds is now being displayed.
      • Added support for displaying the HTTP DNT ("Do Not Track") header.
      • Added support for displaying $_FILES.
    • :doc:`Migration Library <libraries/migration>` changes include:
      • Added support for timestamp-based migrations (enabled by default).
      • Added $config['migration_type'] to allow switching between sequential and timestamp migrations.
    • :doc:`XML-RPC Library <libraries/xmlrpc>` changes include:
      • Added the ability to use a proxy.
      • Added Basic HTTP authentication support.
    • :doc:`User Agent Library <libraries/user_agent>` changes include:
      • Added check to detect if robots are pretending to be mobile clients (helps with e.g. Google indexing mobile website versions).
      • Added method parse() to allow parsing a custom user-agent string, different from the current visitor's.
    • :doc:`HTML Table Library <libraries/table>` changes include:
      • Added method chaining support.
      • Added support for setting table class defaults in a config file.
    • :doc:`Zip Library <libraries/zip>` changes include:
      • Method read_file() can now also alter the original file path/name while adding files to an archive.
      • Added support for changing the compression level.
    • :doc:`Trackback Library <libraries/trackback>` method receive() will now utilize iconv() if it is available but mb_convert_encoding() is not.
  • Core
    • :doc:`Routing <general/routing>` changes include:
      • Added support for multiple levels of controller directories.
      • Added support for per-directory default_controller and 404_override classes.
      • Added possibility to route requests using HTTP verbs.
      • Added possibility to route requests using callbacks.
      • Added a new reserved route (translate_uri_dashes) to allow usage of dashes in the controller and method URI segments.
      • Deprecated methods fetch_directory(), fetch_class() and fetch_method() in favor of their respective public properties.
      • Removed method _set_overrides() and moved its logic to the class constructor.
    • :doc:`URI Library <libraries/uri>` changes include:
      • Added conditional PCRE UTF-8 support to the "invalid URI characters" check and removed the preg_quote() call from it to allow more flexibility.
      • Renamed method _filter_uri() to filter_uri().
      • Changed method filter_uri() to accept by reference and removed its return value.
      • Changed private methods to protected so that MY_URI can override them.
      • Renamed internal method _parse_cli_args() to _parse_argv().
      • Renamed internal method _detect_uri() to _parse_request_uri().
      • Changed _parse_request_uri() to accept absolute URIs for compatibility with HTTP/1.1 as per RFC2616 <https://www.ietf.org/rfc/rfc2616.txt>.
      • Added protected method _parse_query_string() to URI paths in the the QUERY_STRING value, like _parse_request_uri() does.
      • Changed URI string detection logic to always default to REQUEST_URI unless configured otherwise or under CLI.
      • Removed methods _remove_url_suffix(), _explode_segments() and moved their logic into _set_uri_string().
      • Removed method _fetch_uri_string() and moved its logic into the class constructor.
      • Removed method _reindex_segments().
    • :doc:`Loader Library <libraries/loader>` changes include:
      • Added method chaining support.
      • Added method get_vars() to the Loader to retrieve all variables loaded with $this->load->vars().
      • _ci_autoloader() is now a protected method.
      • Added autoloading of drivers with $autoload['drivers'].
      • $config['rewrite_short_tags'] now has no effect when using PHP 5.4 as <?= will always be available.
      • Changed method config() to return whatever CI_Config::load() returns instead of always being void.
      • Added support for library and model aliasing on autoload.
      • Changed method is_loaded() to ask for the (case sensitive) library name instead of its instance name.
      • Removed $_base_classes property and unified all class data in $_ci_classes instead.
      • Added method clear_vars() to allow clearing the cached variables for views.
    • :doc:`Input Library <libraries/input>` changes include:
      • Deprecated the $config['global_xss_filtering'] setting.
      • Added method() to retrieve $_SERVER['REQUEST_METHOD'].
      • Added support for arrays and network addresses (e.g. 192.168.1.1/24) for use with the proxy_ips setting.
      • Added method input_stream() to aid in using php://input stream data such as one passed via PUT, DELETE and PATCH requests.
      • Changed method valid_ip() to use PHP's native filter_var() function.
      • Changed internal method _sanitize_globals() to skip enforcing reversal of register_globals in PHP 5.4+, where this functionality no longer exists.
      • Changed methods get(), post(), get_post(), cookie(), server(), user_agent() to return NULL instead of FALSE when no value is found.
      • Changed default value of the $xss_clean parameter to NULL for all methods that utilize it, the default value is now determined by the $config['global_xss_filtering'] setting.
      • Added method post_get() and changed get_post() to search in GET data first. Both methods' names now properly match their GET/POST data search priorities.
      • Changed method _fetch_from_array() to parse array notation in field name.
      • Changed method _fetch_from_array() to allow retrieving multiple fields at once.
      • Added an option for _clean_input_keys() to return FALSE instead of terminating the whole script.
      • Deprecated the is_cli_request() method, it is now an alias for the new :php:func:`is_cli()` common function.
      • Added an $xss_clean parameter to method user_agent() and removed the $user_agent property.
      • Added property $raw_input_stream to access php://input data.
    • :doc:`Common functions <general/common_functions>` changes include:
    • :doc:`Output Library <libraries/output>` changes include:
      • Added a second argument to method set_content_type() that allows setting the document charset as well.
      • Added methods get_content_type() and get_header().
      • Added method delete_cache().
      • Added configuration option $config['cache_query_string'] to enable taking the query string into account when caching.
      • Changed caching behavior to compress the output before storing it, if $config['compress_output'] is enabled.
    • :doc:`Config Library <libraries/config>` changes include:
      • Changed site_url() method to accept an array as well.
      • Removed internal method _assign_to_config() and moved its implementation to CodeIgniter.php instead.
      • item() now returns NULL instead of FALSE when the required config item doesn't exist.
      • Added an optional second parameter to both base_url() and site_url() that allows enforcing of a protocol different than the one in the base_url configuration setting.
      • Added HTTP "Host" header character validation to prevent cache poisoning attacks when base_url auto-detection is used.
    • :doc:`Security Library <libraries/security>` changes include:
      • Added $config['csrf_regeneration'], which makes CSRF token regeneration optional.
      • Added $config['csrf_exclude_uris'], allowing for exclusion of URIs from the CSRF protection (regular expressions are supported).
      • Added method strip_image_tags().
      • Added method get_random_bytes() and switched CSRF & XSS token generation to use it.
      • Modified method sanitize_filename() to read a public $filename_bad_chars property for getting the invalid characters list.
      • Return status code of 403 instead of a 500 if CSRF protection is enabled but a token is missing from a request.
    • :doc:`Language Library <libraries/language>` changes include:
      • Changed method load() to filter the language name with ctype_alpha().
      • Changed method load() to also accept an array of language files.
      • Added an optional second parameter to method line() to disable error logging for line keys that were not found.
      • Language files are now loaded in a cascading style with the one in system/ always loaded and overridden afterwards, if another one is found.
    • :doc:`Hooks Library <general/hooks>` changes include:
      • Added support for closure hooks (or anything that is_callable() returns TRUE for).
      • Renamed method _call_hook() to call_hook().
      • Class instances are now stored in order to maintain their state.
    • UTF-8 Library changes include:
      • UTF8_ENABLED now requires only one of Multibyte String or iconv to be available instead of both.
      • Changed method clean_string() to utilize mb_convert_encoding() if it is available.
      • Renamed method _is_ascii() to is_ascii() and made it public.
    • Log Library changes include:
      • Added a $config['log_file_permissions'] setting.
      • Changed the library constructor to try to create the log_path directory if it doesn't exist.
      • Added support for microseconds ("u" date format character) in $config['log_date_format'].
    • Added :doc:`compatibility layers <general/compatibility_functions>` for:
      • Multibyte String (limited support).
      • Hash (hash_equals(), hash_pbkdf2()).
      • Password Hashing.
      • Standard Functions ``array_column()`, array_replace(), array_replace_recursive(), hex2bin(), quoted_printable_encode().
    • Removed CI_CORE boolean constant from CodeIgniter.php (no longer Reactor and Core versions).
    • Added support for HTTP-Only cookies with new config option cookie_httponly (default FALSE).
    • $config['time_reference'] now supports all timezone strings supported by PHP.
    • Fatal PHP errors are now also passed to _error_handler(), so they can be logged.

Bug fixes for 3.0

Version 2.2.3

Release Date: July 14, 2015

  • Security
    • Removed a fallback to mysql_escape_string() in the 'mysql' database driver (escape_str() method) when there's no active database connection.

Version 2.2.2

Release Date: April 15, 2015

  • General Changes
    • Added HTTP "Host" header character validation to prevent cache poisoning attacks when base_url auto-detection is used.
    • Added FSCommand and seekSegmentTime to the "evil attributes" list in CI_Security::xss_clean().

Bug fixes for 2.2.2

  • Fixed a bug (#3665) - CI_Security::entity_decode() triggered warnings under some circumstances.

Version 2.2.1

Release Date: January 22, 2015

Bug fixes for 2.2.1

Version 2.2.0

Release Date: June 2, 2014

  • General Changes
    • Security: Encrypt Library method xor_encode() has been removed. The Encrypt Class now requires the Mcrypt extension to be installed.
    • Security: The :doc:`Session Library <libraries/sessions>` now uses HMAC authentication instead of a simple MD5 checksum.

Bug fixes for 2.2.0

Version 2.1.4

Release Date: July 8, 2013

  • General Changes
    • Improved security in xss_clean().

Bug fixes for 2.1.4

Version 2.1.3

Release Date: October 8, 2012

Bug fixes for 2.1.3

Version 2.1.2

Release Date: June 29, 2012

  • General Changes
    • Improved security in xss_clean().

Version 2.1.1

Release Date: June 12, 2012

Bug fixes for 2.1.1

  • Fixed a bug (#697) - A wrong array key was used in the :doc:`File Uploading Library <libraries/file_uploading>` to check for mime-types.
  • Fixed a bug - form_open() compared $action against site_url() instead of base_url().
  • Fixed a bug - CI_Upload::_file_mime_type() could've failed if mime_content_type() is used for the detection and returns FALSE.
  • Fixed a bug (#538) - Windows paths were ignored when using the :doc:`Image Manipulation Library <libraries/image_lib>` to create a new file.
  • Fixed a bug - When database caching was enabled, $this->db->query() checked the cache before binding variables which resulted in cached queries never being found.
  • Fixed a bug - CSRF cookie value was allowed to be any (non-empty) string before being written to the output, making code injection a risk.
  • Fixed a bug (#726) - PDO put a 'dbname' argument in its connection string regardless of the database platform in use, which made it impossible to use SQLite.
  • Fixed a bug - CI_DB_pdo_driver::num_rows() was not returning properly value with SELECT queries, cause it was relying on PDOStatement::rowCount().
  • Fixed a bug (#1059) - CI_Image_lib::clear() was not correctly clearing all necessary object properties, namely width and height.

Version 2.1.0

Release Date: November 14, 2011

Bug fixes for 2.1.0

  • Fixed #378 Robots identified as regular browsers by the User Agent class.
  • If a config class was loaded first then a library with the same name is loaded, the config would be ignored.
  • Fixed a bug (Reactor #19) where 1) the 404_override route was being ignored in some cases, and 2) auto-loaded libraries were not available to the 404_override controller when a controller existed but the requested method did not.
  • Fixed a bug (Reactor #89) where MySQL export would fail if the table had hyphens or other non alphanumeric/underscore characters.
  • Fixed a bug (#105) that stopped query errors from being logged unless database debugging was enabled
  • Fixed a bug (#160) - Removed unneeded array copy in the file cache driver.
  • Fixed a bug (#150) - field_data() now correctly returns column length.
  • Fixed a bug (#8) - load_class() now looks for core classes in APPPATH first, allowing them to be replaced.
  • Fixed a bug (#24) - ODBC database driver called incorrect parent in __construct().
  • Fixed a bug (#85) - OCI8 (Oracle) database escape_str() function did not escape correct.
  • Fixed a bug (#344) - Using schema found in :doc:`Saving Session Data to a Database <libraries/sessions>`, system would throw error "user_data does not have a default value" when deleting then creating a session.
  • Fixed a bug (#112) - OCI8 (Oracle) driver didn't pass the configured database character set when connecting.
  • Fixed a bug (#182) - OCI8 (Oracle) driver used to re-execute the statement whenever num_rows() is called.
  • Fixed a bug (#82) - WHERE clause field names in the DB update_string() method were not escaped, resulting in failed queries in some cases.
  • Fixed a bug (#89) - Fix a variable type mismatch in DB display_error() where an array is expected, but a string could be set instead.
  • Fixed a bug (#467) - Suppress warnings generated from get_magic_quotes_gpc() (deprecated in PHP 5.4)
  • Fixed a bug (#484) - First time _csrf_set_hash() is called, hash is never set to the cookie (in Security.php).
  • Fixed a bug (#60) - Added _file_mime_type() method to the :doc:`File Uploading Library <libraries/file_uploading>` in order to fix a possible MIME-type injection.
  • Fixed a bug (#537) - Support for all wav type in browser.
  • Fixed a bug (#576) - Using ini_get() function to detect if apc is enabled or not.
  • Fixed invalid date time format in :doc:`Date helper <helpers/date_helper>` and :doc:`XMLRPC library <libraries/xmlrpc>`.
  • Fixed a bug (#200) - MySQL queries would be malformed after calling db->count_all() then db->get().

Version 2.0.3

Release Date: August 20, 2011

  • Security

    • An improvement was made to the MySQL and MySQLi drivers to prevent exposing a potential vector for SQL injection on sites using multi-byte character sets in the database client connection. An incompatibility in PHP versions < 5.2.3 and MySQL < 5.0.7 with mysql_set_charset() creates a situation where using multi-byte character sets on these environments may potentially expose a SQL injection attack vector. Latin-1, UTF-8, and other "low ASCII" character sets are unaffected on all environments.

      If you are running or considering running a multi-byte character set for your database connection, please pay close attention to the server environment you are deploying on to ensure you are not vulnerable.

  • General Changes

    • Fixed a bug where there was a misspelling within a code comment in the index.php file.
    • Added Session Class userdata to the output profiler. Additionally, added a show/hide toggle on HTTP Headers, Session Data and Config Variables.
    • Removed internal usage of the EXT constant.
    • Visual updates to the welcome_message view file and default error templates. Thanks to danijelb for the pull request.
    • Added insert_batch() function to the PostgreSQL database driver. Thanks to epallerols for the patch.
    • Added "application/x-csv" to mimes.php.
    • Fixed a bug where :doc:`Email library <libraries/email>` attachments with a "." in the name would using invalid MIME-types.

  • Helpers

    • Added an optional third parameter to heading() which allows adding html attributes to the rendered heading tag.
    • form_open() now only adds a hidden (Cross-site Reference Forgery) protection field when the form's action is internal and is set to the post method. (Reactor #165)
    • Re-worked plural() and singular() functions in the :doc:`Inflector helper <helpers/inflector_helper>` to support considerably more words.

  • Libraries

    • Altered Session to use a longer match against the user_agent string. See upgrade notes if using database sessions.
    • Added $this->db->set_dbprefix() to the :doc:`Database Driver <database/queries>`.
    • Changed $this->cart->insert() in the Cart Library to return the Row ID if a single item was inserted successfully.
    • Added $this->load->get_var() to the :doc:`Loader library <libraries/loader>` to retrieve global vars set with $this->load->view() and $this->load->vars().
    • Changed $this->db->having() to insert quotes using escape() rather than escape_str().

Bug fixes for 2.0.3

  • Added ENVIRONMENT to reserved constants. (Reactor #196)
  • Changed server check to ensure SCRIPT_NAME is defined. (Reactor #57)
  • Removed APPPATH.'third_party' from the packages autoloader to negate needless file stats if no packages exist or if the developer does not load any other packages by default.
  • Fixed a bug (Reactor #231) where Sessions Library database table example SQL did not contain an index on last_activity. See :doc:`Upgrade Notes <installation/upgrade_203>`.
  • Fixed a bug (Reactor #229) where the Sessions Library example SQL in the documentation contained incorrect SQL.
  • Fixed a bug (Core #340) where when passing in the second parameter to $this->db->select(), column names in subsequent queries would not be properly escaped.
  • Fixed issue #199 - Attributes passed as string does not include a space between it and the opening tag.
  • Fixed a bug where the method $this->cart->total_items() from Cart Library now returns the sum of the quantity of all items in the cart instead of your total count.
  • Fixed a bug where not setting 'null' when adding fields in db_forge for mysql and mysqli drivers would default to NULL instead of NOT NULL as the docs suggest.
  • Fixed a bug where using $this->db->select_max(), $this->db->select_min(), etc could throw notices. Thanks to w43l for the patch.
  • Replace checks for STDIN with php_sapi_name() == 'cli' which on the whole is more reliable. This should get parameters in crontab working.

Version 2.0.2

Release Date: April 7, 2011 Hg Tag: v2.0.2

  • General changes
    • The :doc:`Security library <./libraries/security>` was moved to the core and is now loaded automatically. Please remove your loading calls.
    • The CI_SHA class is now deprecated. All supported versions of PHP provide a sha1() function.
    • constants.php will now be loaded from the environment folder if available.
    • Added language key error logging
    • Made Environment Support optional. Comment out or delete the constant to stop environment checks.
    • Added Environment Support for Hooks.
    • Added CI_ Prefix to the :doc:`Cache driver <libraries/caching>`.
    • Added :doc:`CLI usage <./general/cli>` documentation.
  • Helpers
    • Removed the previously deprecated dohash() from the :doc:`Security helper <./helpers/security_helper>`; use do_hash() instead.
    • Changed the 'plural' function so that it doesn't ruin the captalization of your string. It also take into consideration acronyms which are all caps.
  • Database
    • $this->db->count_all_results() will now return an integer instead of a string.

Bug fixes for 2.0.2

  • Fixed a bug (Reactor #145) where the Output Library had parse_exec_vars set to protected.
  • Fixed a bug (Reactor #80) where is_really_writable would create an empty file when on Windows or with safe_mode enabled.
  • Fixed various bugs with User Guide.
  • Added is_cli_request() method to documentation for :doc:`Input class <libraries/input>`.
  • Added form_validation_lang entries for decimal, less_than and greater_than.
  • Fixed issue #153 Escape Str Bug in MSSQL driver.
  • Fixed issue #172 Google Chrome 11 posts incorrectly when action is empty.

Version 2.0.1

Release Date: March 15, 2011 Hg Tag: v2.0.1

Bug fixes for 2.0.1

  • CLI requests can now be run from any folder, not just when CD'ed next to index.php.
  • Fixed issue #41: Added audio/mp3 mime type to mp3.
  • Fixed a bug (Core #329) where the file caching driver referenced the incorrect cache directory.
  • Fixed a bug (Reactor #69) where the SHA1 library was named incorrectly.

Version 2.0.0

Release Date: January 28, 2011 Hg Tag: v2.0.0

  • General changes
    • PHP 4 support is removed. CodeIgniter now requires PHP 5.1.6.
    • Scaffolding, having been deprecated for a number of versions, has been removed.
    • Plugins have been removed, in favor of Helpers. The CAPTCHA plugin has been converted to a Helper and :doc:`documented <./helpers/captcha_helper>`. The JavaScript calendar plugin was removed due to the ready availability of great JavaScript calendars, particularly with jQuery.
    • Added new special Library type: :doc:`Drivers <./general/drivers>`.
    • Added full query-string support. See the config file for details.
    • Moved the application folder outside of the system folder.
    • Moved system/cache and system/logs directories to the application directory.
    • Added routing overrides to the main index.php file, enabling the normal routing to be overridden on a per "index" file basis.
    • Added the ability to set config values (or override config values) directly from data set in the main index.php file. This allows a single application to be used with multiple front controllers, each having its own config values.
    • Added $config['directory_trigger'] to the config file so that a controller sub-directory can be specified when running _GET strings instead of URI segments.
    • Added ability to set "Package" paths - specific paths where the Loader and Config classes should try to look first for a requested file. This allows distribution of sub-applications with their own libraries, models, config files, etc. in a single "package" directory. See the :doc:`Loader class <libraries/loader>` documentation for more details.
    • In-development code is now hosted at BitBucket .
    • Removed the deprecated Validation Class.
    • Added CI_ Prefix to all core classes.
    • Package paths can now be set in application/config/autoload.php.
    • :doc:`Upload library <libraries/file_uploading>` file_name can now be set without an extension, the extension will be taken from the uploaded file instead of the given name.
    • In :doc:`Database Forge <database/forge>` the name can be omitted from $this->dbforge->modify_column()'s 2nd param if you aren't changing the name.
    • $config['base_url'] is now empty by default and will guess what it should be.
    • Enabled full Command Line Interface compatibility with config['uri_protocol'] = 'CLI';.
  • Libraries
    • Added a :doc:`Cache driver <libraries/caching>` with APC, memcached, and file-based support.
    • Added $prefix, $suffix and $first_url properties to :doc:`Pagination library <./libraries/pagination>`.
    • Added the ability to suppress first, previous, next, last, and page links by setting their values to FALSE in the :doc:`Pagination library <./libraries/pagination>`.
    • Added :doc:`Security library <./libraries/security>`, which now contains the xss_clean function, filename_security function and other security related functions.
    • Added CSRF (Cross-site Reference Forgery) protection to the :doc:`Security library <./libraries/security>`.
    • Added $parse_exec_vars property to Output library.
    • Added ability to enable / disable individual sections of the :doc:`Profiler <general/profiling>`
    • Added a wildcard option $config['allowed_types'] = '*' to the :doc:`File Uploading Class <./libraries/file_uploading>`.
    • Added an 'object' config variable to the XML-RPC Server library so that one can specify the object to look for requested methods, instead of assuming it is in the $CI superobject.
    • Added "is_object" into the list of unit tests capable of being run.
    • Table library will generate an empty cell with a blank string, or NULL value.
    • Added ability to set tag attributes for individual cells in the Table library
    • Added a parse_string() method to the :doc:`Parser Class <libraries/parser>`.
    • Added HTTP headers and Config information to the :doc:`Profiler <general/profiling>` output.
    • Added Chrome and Flock to the list of detectable browsers by browser() in the :doc:`User Agent Class <libraries/user_agent>`.
    • The :doc:`Unit Test Class <libraries/unit_testing>` now has an optional "notes" field available to it, and allows for discrete display of test result items using $this->unit->set_test_items().
    • Added a $xss_clean class variable to the XMLRPC library, enabling control over the use of the Security library's xss_clean() method.
    • Added a download() method to the :doc:`FTP library <libraries/ftp>`
    • Changed do_xss_clean() to return FALSE if the uploaded file fails XSS checks.
    • Added stripslashes() and trim()ing of double quotes from $_FILES type value to standardize input in Upload library.
    • Added a second parameter (boolean) to $this->zip->read_dir('/path/to/directory', FALSE) to remove the preceding trail of empty folders when creating a Zip archive. This example would contain a zip with "directory" and all of its contents.
    • Added ability in the Image Library to handle PNG transparency for resize operations when using the GD lib.
    • Modified the Session class to prevent use if no encryption key is set in the config file.
    • Added a new config item to the Session class sess_expire_on_close to allow sessions to auto-expire when the browser window is closed.
    • Improved performance of the Encryption library on servers where Mcrypt is available.
    • Changed the default encryption mode in the Encryption library to CBC.
    • Added an encode_from_legacy() method to provide a way to transition encrypted data from CodeIgniter 1.x to CodeIgniter 2.x. Please see the :doc:`upgrade instructions <./installation/upgrade_200>` for details.
    • Altered Form_Validation library to allow for method chaining on set_rules(), set_message() and set_error_delimiters() functions.
    • Altered Email Library to allow for method chaining.
    • Added request_headers(), get_request_header() and is_ajax_request() to the input class.
    • Altered :doc:`User agent library <libraries/user_agent>` so that is_browser(), is_mobile() and is_robot() can optionally check for a specific browser or mobile device.
    • Altered :doc:`Input library <libraries/input>` so that post() and get() will return all POST and GET items (respectively) if there are no parameters passed in.
  • Database
  • Helpers
  • Other Changes
    • Added an optional second parameter to show_404() to disable logging.
    • Updated loader to automatically apply the sub-class prefix as an option when loading classes. Class names can be prefixed with the standard "CI_" or the same prefix as the subclass prefix, or no prefix at all.
    • Increased randomness with is_really_writable() to avoid file collisions when hundreds or thousands of requests occur at once.
    • Switched some DIR_WRITE_MODE constant uses to FILE_WRITE_MODE where files and not directories are being operated on.
    • get_mime_by_extension() is now case insensitive.
    • Added "default" to the list :doc:`Reserved Names <general/reserved_names>`.
    • Added 'application/x-msdownload' for .exe files and 'application/x-gzip-compressed' for .tgz files to config/mimes.php.
    • Updated the output library to no longer compress output or send content-length headers if the server runs with zlib.output_compression enabled.
    • Eliminated a call to is_really_writable() on each request unless it is really needed (Output caching)
    • Documented append_output() in the :doc:`Output Class <libraries/output>`.
    • Documented a second argument in the decode() function for the Encrypt Class.
    • Documented db->close().
    • Updated the router to support a default route with any number of segments.
    • Moved _remove_invisible_characters() function from the :doc:`Security Library <libraries/security>` to :doc:`common functions. <general/common_functions>`
    • Added audio/mpeg3 as a valid mime type for MP3.

Bug fixes for 2.0.0

  • Fixed a bug where you could not change the User-Agent when sending email.
  • Fixed a bug where the Output class would send incorrect cached output for controllers implementing their own _output() method.
  • Fixed a bug where a failed query would not have a saved query execution time causing errors in the Profiler
  • Fixed a bug that was writing log entries when multiple identical helpers and plugins were loaded.
  • Fixed assorted user guide typos or examples (#10693, #8951, #7825, #8660, #7883, #6771, #10656).
  • Fixed a language key in the profiler: "profiler_no_memory_usage" to "profiler_no_memory".
  • Fixed an error in the Zip library that didn't allow downloading on PHP 4 servers.
  • Fixed a bug in the Form Validation library where fields passed as rule parameters were not being translated (#9132)
  • Modified inflector helper to properly pluralize words that end in 'ch' or 'sh'
  • Fixed a bug in xss_clean() that was not allowing hyphens in query strings of submitted URLs.
  • Fixed bugs in get_dir_file_info() and get_file_info() in the File Helper with recursion, and file paths on Windows.
  • Fixed a bug where Active Record override parameter would not let you disable Active Record if it was enabled in your database config file.
  • Fixed a bug in reduce_double_slashes() in the String Helper to properly remove duplicate leading slashes (#7585)
  • Fixed a bug in values_parsing() of the XML-RPC library which prevented NULL variables typed as 'string' from being handled properly.
  • Fixed a bug were form_open_multipart() didn't accept string attribute arguments (#10930).
  • Fixed a bug (#10470) where get_mime_by_extension() was case sensitive.
  • Fixed a bug where some error messages for the SQLite and Oracle drivers would not display.
  • Fixed a bug where files created with the Zip Library would result in file creation dates of 1980.
  • Fixed a bug in the Session library that would result in PHP error when attempting to store values with objects.
  • Fixed a bug where extending the Controller class would result in a fatal PHP error.
  • Fixed a PHP Strict Standards Error in the index.php file.
  • Fixed a bug where getimagesize() was being needlessly checked on non-image files in is_allowed_type().
  • Fixed a bug in the Encryption library where an empty key was not triggering an error.
  • Fixed a bug in the Email library where CC and BCC recipients were not reset when using the clear() method (#109).
  • Fixed a bug in the URL Helper where prep_url() could cause a PHP error on PHP versions < 5.1.2.
  • Added a log message in core/output if the cache directory config value was not found.
  • Fixed a bug where multiple libraries could not be loaded by passing an array to load->library()
  • Fixed a bug in the html helper where too much white space was rendered between the src and alt tags in the img() function.
  • Fixed a bug in the profilers _compile_queries() function.
  • Fixed a bug in the date helper where the DATE_ISO8601 variable was returning an incorrectly formatted date string.

Version 1.7.2

Release Date: September 11, 2009 Hg Tag: v1.7.2

  • Libraries
  • Database
    • Switched from using gettype() in escape() to is_* methods, since future PHP versions might change its output.
    • Updated all database drivers to handle arrays in escape_str()
    • Added escape_like_str() method for escaping strings to be used in LIKE conditions
    • Updated Active Record to utilize the new LIKE escaping mechanism.
    • Added reconnect() method to DB drivers to try to keep alive / reestablish a connection after a long idle.
    • Modified MSSQL driver to use mssql_get_last_message() for error messages.
  • Helpers
  • General

Bug fixes for 1.7.2

  • Fixed assorted user guide typos or examples (#6743, #7214, #7516, #7287, #7852, #8224, #8324, #8349).
  • Fixed a bug in the Form Validation library where multiple callbacks weren't working (#6110)
  • doctype helper default value was missing a "1".
  • Fixed a bug in the language class when outputting an error for an unfound file.
  • Fixed a bug in the Calendar library where the shortname was output for "May".
  • Fixed a bug with ORIG_PATH_INFO that was allowing URIs of just a slash through.
  • Fixed a fatal error in the Oracle and ODBC drivers (#6752)
  • Fixed a bug where xml_from_result() was checking for a nonexistent method.
  • Fixed a bug where Database Forge's add_column and modify_column were not looping through when sent multiple fields.
  • Fixed a bug where the File Helper was using '/' instead of the DIRECTORY_SEPARATOR constant.
  • Fixed a bug to prevent PHP errors when attempting to use sendmail on servers that have manually disabled the PHP popen() function.
  • Fixed a bug that would cause PHP errors in XML-RPC data if the PHP data type did not match the specified XML-RPC type.
  • Fixed a bug in the XML-RPC class with parsing dateTime.iso8601 data types.
  • Fixed a case sensitive string replacement in xss_clean()
  • Fixed a bug in form_textarea() where form data was not prepped correctly.
  • Fixed a bug in form_prep() causing it to not preserve entities in the user's original input when called back into a form element
  • Fixed a bug in _protect_identifiers() where the swap prefix ($swap_pre) was not being observed.
  • Fixed a bug where the 400 status header sent with the 'disallowed URI characters' was not compatible with CGI environments.
  • Fixed a bug in the typography class where heading tags could have paragraph tags inserted when using auto_typography().

Version 1.7.1

Release Date: February 10, 2009 Hg Tag: 1.7.1

  • Libraries
    • Fixed an arbitrary script execution security flaw (#6068) in the Form Validation library (thanks to hkk)
    • Changed default current page indicator in the Pagination library to use <strong> instead of <b>
    • A "HTTP/1.1 400 Bad Request" header is now sent when disallowed characters are encountered.
    • Added <big>, <small>, <q>, and <tt> to the Typography parser's inline elements.
    • Added more accurate error reporting for the Email library when using sendmail.
    • Removed a strict type check from the rotate() function of the :doc:`Image Manipulation Class <libraries/image_lib>`.
    • Added enhanced error checking in file saving in the Image library when using the GD lib.
    • Added an additional newline between multipart email headers and the MIME message text for better compatibility with a variety of MUAs.
    • Made modest improvements to efficiency and accuracy of explode_name() in the Image lib.
  • Database
    • Added where_in to the list of expected arguments received by delete().
  • Helpers
  • Other Changes
    • Improved security in xss_clean() to help prevent attacks targeting Internet Explorer.
    • Added 'application/msexcel' to config/mimes.php for .xls files.
    • Added 'proxy_ips' config item to whitelist reverse proxy servers from which to trust the HTTP_X_FORWARDED_FOR header to to determine the visitor's IP address.
    • Improved accuracy of Upload::is_allowed_filetype() for images (#6715)

Bug fixes for 1.7.1

  • Database
    • Fixed a bug when doing 'random' on order_by() (#5706).
    • Fixed a bug where adding a primary key through Forge could fail (#5731).
    • Fixed a bug when using DB cache on multiple databases (#5737).
    • Fixed a bug where TRUNCATE was not considered a "write" query (#6619).
    • Fixed a bug where csv_from_result() was checking for a nonexistent method.
    • Fixed a bug _protect_identifiers() where it was improperly removing all pipe symbols from items
  • Fixed assorted user guide typos or examples (#5998, #6093, #6259, #6339, #6432, #6521).
  • Fixed a bug in the MySQLi driver when no port is specified
  • Fixed a bug (#5702), in which the field label was not being fetched properly, when "matching" one field to another.
  • Fixed a bug in which identifers were not being escaped properly when reserved characters were used.
  • Fixed a bug with the regular expression used to protect submitted paragraph tags in auto typography.
  • Fixed a bug where double dashes within tag attributes were being converted to em dash entities.
  • Fixed a bug where double spaces within tag attributes were being converted to non-breaking space entities.
  • Fixed some accuracy issues with curly quotes in Typography::format_characters()
  • Changed a few docblock comments to reflect actual return values.
  • Fixed a bug with high ascii characters in subject and from email headers.
  • Fixed a bug in xss_clean() where whitespace following a validated character entity would not be preserved.
  • Fixed a bug where HTML comments and <pre> tags were being parsed in Typography::auto_typography().
  • Fixed a bug with non-breaking space cleanup in Typography::auto_typography().
  • Fixed a bug in database escaping where a compound statement (ie: SUM()) wasn't handled correctly with database prefixes.
  • Fixed a bug when an opening quote is preceded by a paragraph tag and immediately followed by another tag.
  • Fixed a bug in the Text Helper affecting some locales where word_censor() would not work on words beginning or ending with an accented character.
  • Fixed a bug in the Text Helper character limiter where the provided limit intersects the last word of the string.
  • Fixed a bug (#6342) with plural() in the Inflection helper with words ending in "y".
  • Fixed bug (#6517) where Routed URI segments returned by URI::rsegment() method were incorrect for the default controller.
  • Fixed a bug (#6706) in the Security Helper where xss_clean() was using a deprecated second argument.
  • Fixed a bug in the URL helper url_title() function where trailing periods were allowed at the end of a URL.
  • Fixed a bug (#6669) in the Email class when CRLF's are used for the newline character with headers when used with the "mail" protocol.
  • Fixed a bug (#6500) where URI::A_filter_uri() was exit()ing an error instead of using show_error().
  • Fixed a bug (#6592) in the File Helper where get_dir_file_info() where recursion was not occurring properly.
  • Tweaked Typography::auto_typography() for some edge-cases.

Version 1.7

Release Date: October 23, 2008 Hg Tag: 1.7.0

  • Libraries
  • Database
    • Improved Active Record class to allow full path column and table names: hostname.database.table.column. Also improved the alias handling.
    • Improved how table and column names are escaped and prefixed. It now honors full path names when adding prefixes and escaping.
    • Added Active Record caching feature to "update" and "delete" functions.
    • Added removal of non-printing control characters in escape_str() of DB drivers that do not have native PHP escaping mechanisms (mssql, oci8, odbc), to avoid potential SQL errors, and possible sources of SQL injection.
    • Added port support to MySQL, MySQLi, and MS SQL database drivers.
    • Added driver name variable in each DB driver, based on bug report #4436.
  • Helpers
  • Other Changes
    • Added :doc:`PHP Style Guide <./general/styleguide>` to docs.
    • Added sanitization in xss_clean() for a deprecated HTML tag that could be abused in user input in Internet Explorer.
    • Added a few openxml document mime types, and an additional mobile agent to mimes.php and user_agents.php respectively.
    • Added a file lock check during caching, before trying to write to the file.
    • Modified Cookie key cleaning to unset a few troublesome key names that can be present in certain environments, preventing CI from halting execution.
    • Changed the output of the profiler to use style attribute rather than clear, and added the id "codeigniter_profiler" to the container div.

Bug fixes for 1.7.0

  • Fixed bug in xss_clean() that could remove some desirable tag attributes.
  • Fixed assorted user guide typos or examples (#4807, #4812, #4840, #4862, #4864, #4899, #4930, #5006, #5071, #5158, #5229, #5254, #5351).
  • Fixed an edit from 1.6.3 that made the $robots array in user_agents.php go poof.
  • Fixed a bug in the :doc:`Email library <libraries/email>` with quoted-printable encoding improperly encoding space and tab characters.
  • Modified XSS sanitization to no longer add semicolons after &[single letter], such as in M&M's, B&B, etc.
  • Modified XSS sanitization to no longer strip XHTML image tags of closing slashes.
  • Fixed a bug in the Session class when database sessions are used where upon session update all userdata would be errantly written to the session cookie.
  • Fixed a bug (#4536) in backups with the MySQL driver where some legacy code was causing certain characters to be double escaped.
  • Fixed a routing bug (#4661) that occurred when the default route pointed to a subfolder.
  • Fixed the spelling of "Dhaka" in the timezone_menu() function of the :doc:`Date helper. <helpers/date_helper>`
  • Fixed the spelling of "raspberry" in config/smileys.php.
  • Fixed incorrect parenthesis in form_open() function (#5135).
  • Fixed a bug that was ignoring case when comparing controller methods (#4560).
  • Fixed a bug (#4615) that was not setting SMTP authorization settings when using the initialize function.
  • Fixed a bug in highlight_code() in the :doc:`Text helper <helpers/text_helper>` that would leave a stray </span> in certain cases.
  • Fixed Oracle bug (#3306) that was preventing multiple queries in one action.
  • Fixed ODBC bug that was ignoring connection params due to its use of a constructor.
  • Fixed a DB driver bug with num_rows() that would cause an error with the Oracle driver.
  • Fixed MS SQL bug (#4915). Added brackets around database name in MS SQL driver when selecting the database, in the event that reserved characters are used in the name.
  • Fixed a DB caching bug (4718) in which the path was incorrect when no URI segments were present.
  • Fixed Image_lib class bug #4562. A path was not defined for NetPBM.
  • Fixed Image_lib class bug #4532. When cropping an image with identical height/width settings on output, a copy is made.
  • Fixed DB_driver bug (4900), in which a database error was not being logged correctly.
  • Fixed DB backup bug in which field names were not being escaped.
  • Fixed a DB Active Record caching bug in which multiple calls to cached data were not being honored.
  • Fixed a bug in the Session class that was disallowing slashes in the serialized array.
  • Fixed a Form Validation bug in which the "isset" error message was being trigged by the "required" rule.
  • Fixed a spelling error in a Loader error message.
  • Fixed a bug (5050) with IP validation with empty segments.
  • Fixed a bug in which the parser was being greedy if multiple identical sets of tags were encountered.

Version 1.6.3

Release Date: June 26, 2008 Hg Tag: v1.6.3

Version 1.6.3 is a security and maintenance release and is recommended for all users.

Bug fixes for 1.6.3

  • Added a language key for valid_emails in validation_lang.php.
  • Amended fixes for bug (#3419) with parsing DSN database connections.
  • Moved the _has_operator() function (#4535) into DB_driver from DB_active_rec.
  • Fixed a syntax error in upload_lang.php.
  • Fixed a bug (#4542) with a regular expression in the Image library.
  • Fixed a bug (#4561) where orhaving() wasn't properly passing values.
  • Removed some unused variables from the code (#4563).
  • Fixed a bug where having() was not adding an = into the statement (#4568).
  • Fixed assorted user guide typos or examples (#4574, #4706).
  • Added quoted-printable headers to Email class when the multi-part override is used.
  • Fixed a double opening <p> tag in the index pages of each system directory.

Version 1.6.2

Release Date: May 13, 2008 Hg Tag: 1.6.2

  • Active Record
    • Added the ability to prevent escaping in having() clauses.
    • Added rename_table() into :doc:`DBForge <./database/forge>`.
    • Fixed a bug that wasn't allowing escaping to be turned off if the value of a query was NULL.
    • DB Forge is now assigned to any models that exist after loading (#3457).
  • Database
  • Config
    • Added 'application/vnd.ms-powerpoint' to list of mime types.
    • Added 'audio/mpg' to list of mime types.
    • Added new user-modifiable file constants.php containing file mode and fopen constants.
    • Added the ability to set CRLF settings via config in the :doc:`Email <libraries/email>` class.
  • Libraries
    • Added increased security for filename handling in the Upload library.
    • Added increased security for sessions for client-side data tampering.
    • The MySQLi forge class is now in sync with MySQL forge.
    • Added the ability to set CRLF settings via config in the :doc:`Email <libraries/email>` class.
    • :doc:`Unit Testing <libraries/unit_testing>` results are now colour coded, and a change was made to the default template of results.
    • Added a valid_emails rule to the Validation class.
    • The :doc:`Zip class <libraries/zip>` now exits within download().
    • The :doc:`Zip class <libraries/zip>` has undergone a substantial re-write for speed and clarity (thanks stanleyxu for the hard work and code contribution in bug report #3425!)
  • Helpers
  • Plugins
    • Modified captcha generation to first look for the function imagecreatetruecolor, and fallback to imagecreate if it isn't available (#4226).
  • Other Changes
    • Added ability for :doc:`xss_clean() <libraries/input>` to accept arrays.
    • Removed closing PHP tags from all PHP files to avoid accidental output and potential 'cannot modify headers' errors.
    • Removed "scripts" from the auto-load search path. Scripts were deprecated in Version 1.4.1 (September 21, 2006). If you still need to use them for legacy reasons, they must now be manually loaded in each Controller.
    • Added a :doc:`Reserved Names <general/reserved_names>` page to the userguide, and migrated reserved controller names into it.
    • Added a :doc:`Common Functions <general/common_functions>` page to the userguide for globally available functions.
    • Improved security and performance of xss_clean().

Bugfixes for 1.6.2

  • Fixed a bug where SET queries were not being handled as "write" queries.
  • Fixed a bug (#3191) with ORIG_PATH_INFO URI parsing.
  • Fixed a bug in DB Forge, when inserting an id field (#3456).
  • Fixed a bug in the table library that could cause identically constructed rows to be dropped (#3459).
  • Fixed DB Driver and MySQLi result driver checking for resources instead of objects (#3461).
  • Fixed an AR_caching error where it wasn't tracking table aliases (#3463).
  • Fixed a bug in AR compiling, where select statements with arguments got incorrectly escaped (#3478).
  • Fixed an incorrect documentation of $this->load->language (#3520).
  • Fixed bugs (#3523, #4350) in get_filenames() with recursion and problems with Windows when $include_path is used.
  • Fixed a bug (#4153) in the XML-RPC class preventing dateTime.iso8601 from being used.
  • Fixed an AR bug with or_where_not_in() (#4171).
  • Fixed a bug with :doc:`xss_clean() <libraries/input>` that would add semicolons to GET URI variable strings.
  • Fixed a bug (#4206) in the Directory Helper where the directory resource was not being closed, and minor improvements.
  • Fixed a bug in the FTP library where delete_dir() was not working recursively (#4215).
  • Fixed a Validation bug when set_rules() is used with a non-array field name and rule (#4220).
  • Fixed a bug (#4223) where DB caching would not work for returned DB objects or multiple DB connections.
  • Fixed a bug in the Upload library that might output the same error twice (#4390).
  • Fixed an AR bug when joining with a table alias and table prefix (#4400).
  • Fixed a bug in the DB class testing the $params argument.
  • Fixed a bug in the Table library where the integer 0 in cell data would be displayed as a blank cell.
  • Fixed a bug in link_tag() of the :doc:`URL helper <helpers/url_helper>` where a key was passed instead of a value.
  • Fixed a bug in DB_result::row() that prevented it from returning individual fields with MySQL NULL values.
  • Fixed a bug where SMTP emails were not having dot transformation performed on lines that begin with a dot.
  • Fixed a bug in display_error() in the DB driver that was instantiating new Language and Exception objects, and not using the error heading.
  • Fixed a bug (#4413) where a URI containing slashes only e.g. 'http://example.com/index.php?//' would result in PHP errors
  • Fixed an array to string conversion error in the Validation library (#4425)
  • Fixed bug (#4451, #4299, #4339) where failed transactions will not rollback when debug mode is enabled.
  • Fixed a bug (#4506) with overlay_watermark() in the Image library preventing support for PNG-24s with alpha transparency
  • Fixed assorted user guide typos (#3453, #4364, #4379, #4399, #4408, #4412, #4448, #4488).

Version 1.6.1

Release Date: February 12, 2008 Hg Tag: 1.6.1

  • Active Record
  • Database drivers
    • Added support for setting client character set and collation for MySQLi.
  • Core Changes
    • Modified xss_clean() to be more intelligent with its handling of URL encoded strings.
    • Added $_SERVER, $_FILES, $_ENV, and $_SESSION to sanitization of globals.
    • Added a :doc:`Path Helper <./helpers/path_helper>`.
    • Simplified _reindex_segments() in the URI class.
    • Escaped the '-' in the default 'permitted_uri_chars' config item, to prevent errors if developers just try to add additional characters to the end of the default expression.
    • Modified method calling to controllers to show a 404 when a private or protected method is accessed via a URL.
    • Modified framework initiated 404s to log the controller and method for invalid requests.
  • Helpers
    • Modified get_filenames() in the File Helper to return FALSE if the $source_dir is not readable.

Bugfixes for 1.6.1

  • Deprecated is_numeric as a validation rule. Use of numeric and integer are preferred.
  • Fixed bug (#3379) in DBForge with SQLite for table creation.
  • Made Active Record fully database prefix aware (#3384).
  • Fixed a bug where DBForge was outputting invalid SQL in Postgres by adding brackets around the tables in FROM.
  • Changed the behaviour of Active Record's update() to make the WHERE clause optional (#3395).
  • Fixed a bug (#3396) where certain POST variables would cause a PHP warning.
  • Fixed a bug in query binding (#3402).
  • Changed order of SQL keywords in the Profiler $highlight array so OR would not be highlighted before ORDER BY.
  • Fixed a bug (#3404) where the MySQLi driver was testing if $this->conn_id was a resource instead of an object.
  • Fixed a bug (#3419) connecting to a database via a DSN string.
  • Fixed a bug (#3445) where the routed segment array was not re-indexed to begin with 1 when the default controller is used.
  • Fixed assorted user guide typos.

Version 1.6.0

Release Date: January 30, 2008

  • DBForge
  • Active Record
  • Other Database Related
    • MySQL driver now requires MySQL 4.1+
    • Added $this->DB->save_queries variable to DB driver, enabling queries to get saved or not. Previously they were always saved.
    • Added $this->db->dbprefix() to manually add database prefixes.
    • Added 'random' as an order_by() option , and removed "rand()" as a listed option as it was MySQL only.
    • Added a check for NULL fields in the MySQL database backup utility.
    • Added "constrain_by_prefix" parameter to db->list_table() function. If set to TRUE it will limit the result to only table names with the current prefix.
    • Deprecated from Active Record; getwhere() for get_where(); groupby() for group_by(); havingor() for having_or(); orderby() for order_by; orwhere() for or_where(); and orlike() for or_like().
    • Modified csv_from_result() to output CSV data more in the spirit of basic rules of RFC 4180.
    • Added 'char_set' and 'dbcollat' database configuration settings, to explicitly set the client communication properly.
    • Removed 'active_r' configuration setting and replaced with a global $active_record setting, which is more in harmony with the global nature of the behavior (#1834).
  • Core changes
    • Added ability to load multiple views, whose content will be appended to the output in the order loaded.
    • Added the ability to :doc:`auto-load <./general/autoloader>` :doc:`Models <./general/models>`.
    • Reorganized the URI and Routes classes for better clarity.
    • Added Compat.php to allow function overrides for older versions of PHP or PHP environments missing certain extensions / libraries
    • Added memory usage, GET, URI string data, and individual query execution time to Profiler output.
    • Deprecated Scaffolding.
    • Added is_really_writable() to Common.php to provide a cross-platform reliable method of testing file/folder writability.
  • Libraries
    • Changed the load protocol of Models to allow for extension.
    • Strengthened the Encryption library to help protect against man in the middle attacks when MCRYPT_MODE_CBC mode is used.
    • Added Flashdata variables, session_id regeneration and configurable session update times to the :doc:`Session class. <./libraries/sessions>`
    • Removed 'last_visit' from the Session class.
    • Added a language entry for valid_ip validation error.
    • Modified prep_for_form() in the Validation class to accept arrays, adding support for POST array validation (via callbacks only)
    • Added an "integer" rule into the Validation library.
    • Added valid_base64() to the Validation library.
    • Documented clear() in the :doc:`Image Processing <./libraries/image_lib>` library.
    • Changed the behaviour of custom callbacks so that they no longer trigger the "required" rule.
    • Modified Upload class $_FILES error messages to be more precise.
    • Moved the safe mode and auth checks for the Email library into the constructor.
    • Modified variable names in _ci_load() method of Loader class to avoid conflicts with view variables.
    • Added a few additional mime type variations for CSV.
    • Enabled the 'system' methods for the XML-RPC Server library, except for 'system.multicall' which is still disabled.
  • Helpers & Plugins
  • Documentation Changes

Bug fixes for Version 1.6.0

  • Fixed a bug (#1813) preventing using $CI->db in the same application with returned database objects.
  • Fixed a bug (#1842) where the $this->uri->rsegments array would not include the 'index' method if routed to the controller without an implicit method.
  • Fixed a bug (#1872) where word_limiter() was not retaining whitespace.
  • Fixed a bug (#1890) in csv_from_result() where content that included the delimiter would break the file.
  • Fixed a bug (#2542)in the clean_email() method of the Email class to allow for non-numeric / non-sequential array keys.
  • Fixed a bug (#2545) in _html_entity_decode_callback() when 'global_xss_filtering' is enabled.
  • Fixed a bug (#2668) in the :doc:`parser class <./libraries/parser>` where numeric data was ignored.
  • Fixed a bug (#2679) where the "previous" pagination link would get drawn on the first page.
  • Fixed a bug (#2702) in _object_to_array that broke some types of inserts and updates.
  • Fixed a bug (#2732) in the SQLite driver for PHP 4.
  • Fixed a bug (#2754) in Pagination to scan for non-positive num_links.
  • Fixed a bug (#2762) in the :doc:`Session library <./libraries/sessions>` where user agent matching would fail on user agents ending with a space.
  • Fixed a bug (#2784) $field_names[] vs $Ffield_names[] in postgres and sqlite drivers.
  • Fixed a bug (#2810) in the typography helper causing extraneous paragraph tags when string contains tags.
  • Fixed a bug (#2849) where arguments passed to a subfolder controller method would be incorrectly shifted, dropping the 3rd segment value.
  • Fixed a bug (#2858) which referenced a wrong variable in the Image class.
  • Fixed a bug (#2875)when loading plugin files as _plugin. and not _pi.
  • Fixed a bug (#2912) in get_filenames() in the :doc:`File Helper <helpers/file_helper>` where the array wasn't cleared after each call.
  • Fixed a bug (#2974) in highlight_phrase() that caused an error with slashes.
  • Fixed a bug (#3003) in the Encryption Library to support modes other than MCRYPT_MODE_ECB
  • Fixed a bug (#3015) in the :doc:`User Agent library <./libraries/user_agent>` where more than 2 languages where not reported with languages().
  • Fixed a bug (#3017) in the :doc:`Email <./libraries/email>` library where some timezones were calculated incorrectly.
  • Fixed a bug (#3024) in which master_dim wasn't getting reset by clear() in the Image library.
  • Fixed a bug (#3156) in Text Helper highlight_code() causing PHP tags to be handled incorrectly.
  • Fixed a bug (#3166) that prevented num_rows from working in Oracle.
  • Fixed a bug (#3175) preventing certain libraries from working properly when autoloaded in PHP 4.
  • Fixed a bug (#3267) in the Typography Helper where unordered list was listed "un.
  • Fixed a bug (#3268) where the Router could leave '/' as the path.
  • Fixed a bug (#3279) where the Email class was sending the wrong Content-Transfer-Encoding for some character sets.
  • Fixed a bug (#3284) where the rsegment array would not be set properly if the requested URI contained more segments than the routed URI.
  • Removed extraneous load of $CFG in _display_cache() of the Output class (#3285).
  • Removed an extraneous call to loading models (#3286).
  • Fixed a bug (#3310) with sanitization of globals in the Input class that could unset CI's global variables.
  • Fixed a bug (#3314) which would cause the top level path to be deleted in delete_files() of the File helper.
  • Fixed a bug (#3328) where the smiley helper might return an undefined variable.
  • Fixed a bug (#3330) in the FTP class where a comparison wasn't getting made.
  • Removed an unused parameter from Profiler (#3332).
  • Fixed a bug in database driver where num_rows property wasn't getting updated.
  • Fixed a bug in the :doc:`upload library <./libraries/file_uploading>` when allowed_files wasn't defined.
  • Fixed a bug in word_wrap() of the Text Helper that incorrectly referenced an object.
  • Fixed a bug in Validation where valid_ip() wasn't called properly.
  • Fixed a bug in Validation where individual error messages for checkboxes wasn't supported.
  • Fixed a bug in captcha calling an invalid PHP function.
  • Fixed a bug in the cookie helper "set_cookie" function. It was not honoring the config settings.
  • Fixed a bug that was making validation callbacks required even when not set as such.
  • Fixed a bug in the XML-RPC library so if a type is specified, a more intelligent decision is made as to the default type.
  • Fixed an example of comma-separated emails in the email library documentation.
  • Fixed an example in the Calendar library for Showing Next/Previous Month Links.
  • Fixed a typo in the database language file.
  • Fixed a typo in the image language file "suppor" to "support".
  • Fixed an example for XML RPC.
  • Fixed an example of accept_charset() in the :doc:`User Agent Library <./libraries/user_agent>`.
  • Fixed a typo in the docblock comments that had CodeIgniter spelled CodeIgnitor.
  • Fixed a typo in the :doc:`String Helper <./helpers/string_helper>` (uniquid changed to uniqid).
  • Fixed typos in the email Language class (email_attachment_unredable, email_filed_smtp_login), and FTP Class (ftp_unable_to_remame).
  • Added a stripslashes() into the Upload Library.
  • Fixed a series of grammatical and spelling errors in the language files.
  • Fixed assorted user guide typos.

Version 1.5.4

Release Date: July 12, 2007

  • Added :doc:`custom Language files <./libraries/language>` to the :doc:`autoload <./general/autoloader>` options.
  • Added stripslashes() to the _clean_input_data() function in the :doc:`Input class <./libraries/input>` when magic quotes is on so that data will always be un-slashed within the framework.
  • Added array to string into the :doc:`profiler <general/profiling>`.
  • Added some additional mime types in application/config/mimes.php.
  • Added filename_security() method to :doc:`Input library <./libraries/input>`.
  • Added some additional arguments to the :doc:`Inflection helper <./helpers/inflector_helper>` singular() to compensate for words ending in "s". Also added a force parameter to pluralize().
  • Added $config['charset'] to the config file. Default value is 'UTF-8', used in some string handling functions.
  • Fixed MSSQL insert_id().
  • Fixed a logic error in the DB trans_status() function. It was incorrectly returning TRUE on failure and FALSE on success.
  • Fixed a bug that was allowing multiple load attempts on extended classes.
  • Fixed a bug in the bootstrap file that was incorrectly attempting to discern the full server path even when it was explicity set by the user.
  • Fixed a bug in the escape_str() function in the MySQL driver.
  • Fixed a typo in the :doc:`Calendar library <./libraries/calendar>`
  • Fixed a typo in rpcs.php library
  • Fixed a bug in the :doc:`Zip library <./libraries/zip>`, providing PC Zip file compatibility with Mac OS X
  • Fixed a bug in router that was ignoring the scaffolding route for optimization
  • Fixed an IP validation bug.
  • Fixed a bug in display of POST keys in the :doc:`Profiler <./general/profiling>` output
  • Fixed a bug in display of queries with characters that would be interpreted as HTML in the :doc:`Profiler <./general/profiling>` output
  • Fixed a bug in display of Email class print debugger with characters that would be interpreted as HTML in the debugging output
  • Fixed a bug in the Content-Transfer-Encoding of HTML emails with the quoted-printable MIME type
  • Fixed a bug where one could unset certain PHP superglobals by setting them via GET or POST data
  • Fixed an undefined function error in the insert_id() function of the PostgreSQL driver
  • Fixed various doc typos.
  • Documented two functions from the :doc:`String helper <./helpers/string_helper>` that were missing from the user guide: trim_slashes() and reduce_double_slashes().
  • Docs now validate to XHTML 1 transitional
  • Updated the XSS Filtering to take into account the IE expression() ability and improved certain deletions to prevent possible exploits
  • Modified the Router so that when Query Strings are Enabled, the controller trigger and function trigger values are sanitized for filename include security.
  • Modified the is_image() method in the Upload library to take into account Windows IE 6/7 eccentricities when dealing with MIMEs
  • Modified XSS Cleaning routine to be more performance friendly and compatible with PHP 5.2's new PCRE backtrack and recursion limits.
  • Modified the :doc:`URL Helper <./helpers/url_helper>` to type cast the $title as a string in case a numeric value is supplied
  • Modified Form Helper form_dropdown() to type cast the keys and values of the options array as strings, allowing numeric values to be properly set as 'selected'
  • Deprecated the use if is_numeric() in various places since it allows periods. Due to compatibility problems with ctype_digit(), making it unreliable in some installations, the following regular expression was used instead: preg_match("/[^0-9]/", $n)
  • Deprecated: APPVER has been deprecated and replaced with CI_VERSION for clarity.

Version 1.5.3

Release Date: April 15, 2007

  • Added array to string into the profiler
  • Code Igniter references updated to CodeIgniter
  • pMachine references updated to EllisLab
  • Fixed a bug in the repeater() function of :doc:`string helper <./helpers/string_helper>`.
  • Fixed a bug in ODBC driver
  • Fixed a bug in result_array() that was returning an empty array when no result is produced.
  • Fixed a bug in the redirect function of the :doc:`url helper <./helpers/url_helper>`.
  • Fixed an undefined variable in Loader
  • Fixed a version bug in the Postgres driver
  • Fixed a bug in the textarea function of the form helper for use with strings
  • Fixed doc typos.

Version 1.5.2

Release Date: February 13, 2007

Version 1.5.1

Release Date: November 23, 2006

  • Added support for submitting arrays of libraries in the $this->load->library function.
  • Added support for naming custom library files in lower or uppercase.
  • Fixed a bug related to output buffering.
  • Fixed a bug in the active record class that was not resetting query data after a completed query.
  • Fixed a bug that was suppressing errors in controllers.
  • Fixed a problem that can cause a loop to occur when the config file is missing.
  • Fixed a bug that occurred when multiple models were loaded with the third parameter set to TRUE.
  • Fixed an oversight that was not unsetting globals properly in the input sanitize function.
  • Fixed some bugs in the Oracle DB driver.
  • Fixed an incorrectly named variable in the MySQLi result driver.
  • Fixed some doc typos.

Version 1.5.0.1

Release Date: October 31, 2006

  • Fixed a problem in which duplicate attempts to load helpers and classes were not being stopped.
  • Fixed a bug in the word_wrap() helper function.
  • Fixed an invalid color Hex number in the Profiler class.
  • Fixed a corrupted image in the user guide.

Version 1.5.0

Release Date: October 30, 2006

Version 1.4.1

Release Date: September 21, 2006

  • Added a new feature that passes URI segments directly to your function calls as parameters. See the :doc:`Controllers <general/controllers>` page for more info.
  • Added support for a function named _output(), which when used in your controllers will received the final rendered output from the output class. More info in the :doc:`Controllers <general/controllers>` page.
  • Added several new functions in the :doc:`URI Class <./libraries/uri>` to let you retrieve and manipulate URI segments that have been re-routed using the :doc:`URI Routing <general/routing>` feature. Previously, the URI class did not permit you to access any re-routed URI segments, but now it does.
  • Added :doc:`$this->output->set_header() <./libraries/output>` function, which allows you to set server headers.
  • Updated plugins, helpers, and language classes to allow your application folder to contain its own plugins, helpers, and language folders. Previously they were always treated as global for your entire installation. If your application folder contains any of these resources they will be used instead the global ones.
  • Added :doc:`Inflector helper <./helpers/inflector_helper>`.
  • Added element() function in the :doc:`array helper <./helpers/array_helper>`.
  • Added RAND() to active record orderby() function.
  • Added delete_cookie() and get_cookie() to :doc:`Cookie helper <./helpers/cookie_helper>`, even though the input class has a cookie fetching function.
  • Added Oracle database driver (still undergoing testing so it might have some bugs).
  • Added the ability to combine pseudo-variables and php variables in the template parser class.
  • Added output compression option to the config file.
  • Removed the is_numeric test from the db->escape() function.
  • Fixed a MySQLi bug that was causing error messages not to contain proper error data.
  • Fixed a bug in the email class which was causing it to ignore explicitly set alternative headers.
  • Fixed a bug that was causing a PHP error when the Exceptions class was called within the get_config() function since it was causing problems.
  • Fixed an oversight in the cookie helper in which the config file cookie settings were not being honored.
  • Fixed an oversight in the upload class. An item mentioned in the 1.4 changelog was missing.
  • Added some code to allow email attachments to be reset when sending batches of email.
  • Deprecated the application/scripts folder. It will continue to work for legacy users, but it is recommended that you create your own :doc:`libraries <./general/libraries>` or :doc:`models <./general/models>` instead. It was originally added before CI had user libraries or models, but it's not needed anymore.
  • Deprecated the $autoload['core'] item from the autoload.php file. Instead, please now use: $autoload['libraries']
  • Deprecated the following database functions: $this->db->smart_escape_str() and $this->db->fields().

Version 1.4.0

Release Date: September 17, 2006

  • Added :doc:`Hooks <./general/hooks>` feature, enabling you to tap into and modify the inner workings of the framework without hacking the core files.
  • Added the ability to organize controller files :doc:`into sub-folders <general/controllers>`. Kudos to Marco for suggesting this (and the next two) feature.
  • Added regular expressions support for :doc:`routing rules <./general/routing>`.
  • Added the ability to :doc:`remap function calls <./general/controllers>` within your controllers.
  • Added the ability to :doc:`replace core system classes <./general/core_classes>` with your own classes.
  • Added support for % character in URL.
  • Added the ability to supply full URLs using the :doc:`anchor() <./helpers/url_helper>` helper function.
  • Added mode parameter to :doc:`file_write() <./helpers/file_helper>` helper.
  • Added support for changing the port number in the :doc:`Postgres driver <./database/configuration>`.
  • Moved the list of "allowed URI characters" out of the Router class and into the config file.
  • Moved the MIME type array out of the Upload class and into its own file in the application/config/ folder.
  • Updated the Upload class to allow the upload field name to be set when calling :doc:`do_upload() <./libraries/file_uploading>`.
  • Updated the :doc:`Config Library <./libraries/config>` to be able to load config files silently, and to be able to assign config files to their own index (to avoid collisions if you use multiple config files).
  • Updated the URI Protocol code to allow more options so that URLs will work more reliably in different environments.
  • Updated the form_open() helper to allow the GET method to be used.
  • Updated the MySQLi execute() function with some code to help prevent lost connection errors.
  • Updated the SQLite Driver to check for object support before attempting to return results as objects. If unsupported it returns an array.
  • Updated the Models loader function to allow multiple loads of the same model.
  • Updated the MS SQL driver so that single quotes are escaped.
  • Updated the Postgres and ODBC drivers for better compatibility.
  • Removed a strtolower() call that was changing URL segments to lower case.
  • Removed some references that were interfering with PHP 4.4.1 compatibility.
  • Removed backticks from Postgres class since these are not needed.
  • Renamed display() to _display() in the Output class to make it clear that it's a private function.
  • Deprecated the hash() function due to a naming conflict with a native PHP function with the same name. Please use dohash() instead.
  • Fixed an bug that was preventing the input class from unsetting GET variables.
  • Fixed a router bug that was making it too greedy when matching end segments.
  • Fixed a bug that was preventing multiple discrete database calls.
  • Fixed a bug in which loading a language file was producing a "file contains no data" message.
  • Fixed a session bug caused by the XSS Filtering feature inadvertently changing the case of certain words.
  • Fixed some missing prefixes when using the database prefix feature.
  • Fixed a typo in the Calendar class (cal_november).
  • Fixed a bug in the form_checkbox() helper.
  • Fixed a bug that was allowing the second segment of the URI to be identical to the class name.
  • Fixed an evaluation bug in the database initialization function.
  • Fixed a minor bug in one of the error messages in the language class.
  • Fixed a bug in the date helper timespan function.
  • Fixed an undefined variable in the DB Driver class.
  • Fixed a bug in which dollar signs used as binding replacement values in the DB class would be treated as RegEx back-references.
  • Fixed a bug in the set_hash() function which was preventing MD5 from being used.
  • Fixed a couple bugs in the Unit Testing class.
  • Fixed an incorrectly named variable in the Validation class.
  • Fixed an incorrectly named variable in the URI class.
  • Fixed a bug in the config class that was preventing the base URL from being called properly.
  • Fixed a bug in the validation class that was not permitting callbacks if the form field was empty.
  • Fixed a problem that was preventing scaffolding from working properly with MySQLi.
  • Fixed some MS SQL bugs.
  • Fixed some doc typos.

Version 1.3.3

Release Date: June 1, 2006

  • Models do not connect automatically to the database as of this version. :doc:`More info here <./general/models>`.
  • Updated the Sessions class to utilize the active record class when running session related queries. Previously the queries assumed MySQL syntax.
  • Updated alternator() function to re-initialize when called with no arguments, allowing multiple calls.
  • Fixed a bug in the active record "having" function.
  • Fixed a problem in the validation class which was making checkboxes be ignored when required.
  • Fixed a bug in the word_limiter() helper function. It was cutting off the fist word.
  • Fixed a bug in the xss_clean function due to a PHP bug that affects some versions of html_entity_decode.
  • Fixed a validation bug that was preventing rules from being set twice in one controller.
  • Fixed a calendar bug that was not letting it use dynamically loaded languages.
  • Fixed a bug in the active record class when using WHERE clauses with LIKE
  • Fixed a bug in the hash() security helper.
  • Fixed some typos.

Version 1.3.2

Release Date: April 17, 2006

  • Changed the behavior of the validation class such that if a "required" rule is NOT explicitly stated for a field then all other tests get ignored.
  • Fixed a bug in the Controller class that was causing it to look in the local "init" folder instead of the main system one.
  • Fixed a bug in the init_pagination file. The $config item was not being set correctly.
  • Fixed a bug in the auto typography helper that was causing inconsistent behavior.
  • Fixed a couple bugs in the Model class.
  • Fixed some documentation typos and errata.

Version 1.3.1

Release Date: April 11, 2006

Version 1.3

Release Date: April 3, 2006

  • Added support for :doc:`Models <general/models>`.
  • Redesigned the database libraries to support additional RDBMs (Postgres, MySQLi, etc.).
  • Redesigned the :doc:`Active Record class <./database/query_builder>` to enable more varied types of queries with simpler syntax, and advanced features like JOINs.
  • Added a feature to the database class that lets you run :doc:`custom function calls <./database/call_function>`.
  • Added support for :doc:`private functions <general/controllers>` in your controllers. Any controller function name that starts with an underscore will not be served by a URI request.
  • Added the ability to pass your own initialization parameters to your :doc:`custom core libraries <general/creating_libraries>` when using $this->load->library()
  • Added support for running standard :doc:`query string URLs <general/urls>`. These can be optionally enabled in your config file.
  • Added the ability to :doc:`specify a "suffix" <general/urls>`, which will be appended to your URLs. For example, you could add .html to your URLs, making them appear static. This feature is enabled in your config file.
  • Added a new error template for use with native PHP errors.
  • Added "alternator" function in the :doc:`string helpers <./helpers/string_helper>`.
  • Removed slashing from the input class. After much debate we decided to kill this feature.
  • Change the commenting style in the scripts to the PEAR standard so that IDEs and tools like phpDocumenter can harvest the comments.
  • Added better class and function name-spacing to avoid collisions with user developed classes. All CodeIgniter classes are now prefixed with CI_ and all controller methods are prefixed with _ci to avoid controller collisions. A list of reserved function names can be :doc:`found here <general/controllers>`.
  • Redesigned how the "CI" super object is referenced, depending on whether PHP 4 or 5 is being run, since PHP 5 allows a more graceful way to manage objects that utilizes a bit less resources.
  • Deprecated: $this->db->use_table() has been deprecated. Please read the :doc:`Active Record <./database/query_builder>` page for information.
  • Deprecated: $this->db->smart_escape_str() has been deprecated. Please use this instead: $this->db->escape()
  • Fixed a bug in the exception handler which was preventing some PHP errors from showing up.
  • Fixed a typo in the URI class. $this->total_segment() should be plural: $this->total_segments()
  • Fixed some typos in the default calendar template
  • Fixed some typos in the user guide

Version 1.2

Release Date: March 21, 2006

  • Redesigned some internal aspects of the framework to resolve scoping problems that surfaced during the beta tests. The problem was most notable when instantiating classes in your constructors, particularly if those classes in turn did work in their constructors.
  • Added a global function named :doc:`get_instance() <general/ancillary_classes>` allowing the main CodeIgniter object to be accessible throughout your own classes.
  • Added new :doc:`File Helper <./helpers/file_helper>`: delete_files()
  • Added new :doc:`URL Helpers <./helpers/url_helper>`: base_url(), index_page()
  • Added the ability to create your own :doc:`core libraries <general/creating_libraries>` and store them in your local application directory.
  • Added an overwrite option to the :doc:`Upload class <./libraries/file_uploading>`, enabling files to be overwritten rather than having the file name appended.
  • Added Javascript Calendar plugin.
  • Added search feature to user guide. Note: This is done using Google, which at the time of this writing has not crawled all the pages of the docs.
  • Updated the parser class so that it allows tag pars within other tag pairs.
  • Fixed a bug in the DB "where" function.
  • Fixed a bug that was preventing custom config files to be auto-loaded.
  • Fixed a bug in the mysql class bind feature that prevented question marks in the replacement data.
  • Fixed some bugs in the xss_clean function

Version Beta 1.1

Release Date: March 10, 2006

  • Added a :doc:`Calendaring class <./libraries/calendar>`.
  • Added support for running :doc:`multiple applications <general/managing_apps>` that share a common CodeIgniter backend.
  • Moved the "uri protocol" variable from the index.php file into the config.php file
  • Fixed a problem that was preventing certain function calls from working within constructors.
  • Fixed a problem that was preventing the $this->load->library function from working in constructors.
  • Fixed a bug that occurred when the session class was loaded using the auto-load routine.
  • Fixed a bug that can happen with PHP versions that do not support the E_STRICT constant
  • Fixed a data type error in the form_radio function (form helper)
  • Fixed a bug that was preventing the xss_clean function from being called from the validation class.
  • Fixed the cookie related config names, which were incorrectly specified as $conf rather than $config
  • Fixed a pagination problem in the scaffolding.
  • Fixed a bug in the mysql class "where" function.
  • Fixed a regex problem in some code that trimmed duplicate slashes.
  • Fixed a bug in the br() function in the HTML helper
  • Fixed a syntax mistake in the form_dropdown function in the Form Helper.
  • Removed the "style" attributes form the form helpers.
  • Updated the documentation. Added "next/previous" links to each page and fixed various typos.

Version Beta 1.0

Release Date: February 28, 2006

First publicly released version.