Oci8PDO_Util.php

<?php
    /**
     * PDO Userspace Driver for Oracle (oci8)
     *
     * @category   Database
     * @package    Pdo
     * @subpackage Oci8
     * @author     Ben Ramsey <ramsey@php.net>
     * @copyright  Copyright (c) 2015 Ben Ramsey (http://benramsey.com/)
     * @license    http://open.benramsey.com/license/mit  MIT License
     */

    namespace sfedosimov\oci8pdo;

    /**
     * A static utility class for PDO userspace classes
     */
    class Oci8PDO_Util
    {
        /**
         * Parses a DSN string according to the rules in the PHP manual
         *
         * See also the PDO_User::parseDSN method in pecl/pdo_user. This method
         * mimics the functionality provided by that method.
         *
         * @param string $dsn
         * @param array  $params
         *
         * @return array
         * @link http://www.php.net/manual/en/pdo.construct.php
         */
        public static function parseDsn($dsn, array $params)
        {
            if (strpos($dsn, ':') !== false) {
                $driver = substr($dsn, 0, strpos($dsn, ':'));
                $vars = substr($dsn, strpos($dsn, ':') + 1);

                if ($driver == 'uri') {
                    return self::parseDsn(file_get_contents($vars), $params);
                } else {
                    $returnParams = array();
                    foreach (explode(';', $vars) as $var) {
                        $param = explode('=', $var,
                            2);                //limiting explode to 2 to enable full connection strings
                        if (in_array($param[0], $params)) {
                            $returnParams[$param[0]] = $param[1];
                        }
                    }
                    return $returnParams;
                }
            } else {
                if (strlen(trim($dsn)) > 0) {
                    // The DSN passed in must be an alias set in php.ini
                    return self::parseDsn(self::iniGet("pdo.dsn.{$dsn}"), $params);
                }
            }

            return array();
        }

        /**
         * Wraps ini_get()
         *
         * This is primarily done so that we can easily stub this method in a
         * unit test.
         *
         * @param string $varname
         *
         * @return string
         */
        public static function iniGet($varname)
        {
            return ini_get($varname);
        }
    }