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Added feature to autodelete expired items #13

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Added feature to autodelete expired items #13

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5 changes: 4 additions & 1 deletion README.markdown
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Original file line number Diff line number Diff line change
Expand Up @@ -154,6 +154,9 @@ For erasing cached data are these three methods available:
?>
```

- `autoEraseExpired(<$flag>)` Expired items will automatically erase
when calling `isCached()`, `retreive()`, and `retreiveAll()`

### Check cached data ###

`isCached($key)`
Expand Down Expand Up @@ -248,4 +251,4 @@ cache/7505d64a54e061b7acd54ccd58b49dc43500b635.cache
## Credits ##

Copyright (c) 2011-2013 - Programmed by Christian Metz / [@cosenary](http://twitter.com/cosenary)
Released under the [BSD License](http://www.opensource.org/licenses/bsd-license.php).
Released under the [BSD License](http://www.opensource.org/licenses/bsd-license.php).
34 changes: 34 additions & 0 deletions cache.class.php
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Expand Up @@ -34,6 +34,15 @@ class Cache {
*/
private $_extension = '.cache';

/**
* Determines if expired items are auto erased
*
* @var boolean
*/

private $_autoEraseExpired = FALSE;


/**
* Default constructor
*
Expand All @@ -59,6 +68,10 @@ public function __construct($config = null) {
* @return boolean
*/
public function isCached($key) {
if (TRUE === $this->autoEraseExpired){
$this->eraseExpired();
}

if (false != $this->_loadCache()) {
$cachedData = $this->_loadCache();
return isset($cachedData[$key]['data']);
Expand Down Expand Up @@ -98,6 +111,11 @@ public function store($key, $data, $expiration = 0) {
* @return string
*/
public function retrieve($key, $timestamp = false) {

if (TRUE === $this->autoEraseExpired){
$this->eraseExpired();
}

$cachedData = $this->_loadCache();
(false === $timestamp) ? $type = 'data' : $type = 'time';
if (!isset($cachedData[$key][$type])) return null;
Expand All @@ -111,6 +129,11 @@ public function retrieve($key, $timestamp = false) {
* @return array
*/
public function retrieveAll($meta = false) {

if (TRUE === $this->autoEraseExpired){
$this->eraseExpired();
}

if ($meta === false) {
$results = array();
$cachedData = $this->_loadCache();
Expand Down Expand Up @@ -209,6 +232,17 @@ public function getCacheDir() {
}
}


/**
* Set auto erase behavior
*
* @return boolean
*/

public function autoEraseExpired($flag){
$this->autoEraseExpired = $flag;
return $flag;
}
/**
* Get the filename hash
*
Expand Down