119 lines
2.7 KiB
PHP
119 lines
2.7 KiB
PHP
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<?PHP
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/**
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* patTemplate Template cache that stores data on filesystem
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*
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* $Id: File.php 10381 2008-06-01 03:35:53Z pasamio $
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*
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* @package patTemplate
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* @subpackage Caches
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* @author Stephan Schmidt <schst@php.net>
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*/
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// Check to ensure this file is within the rest of the framework
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defined('JPATH_BASE') or die();
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/**
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* patTemplate Template cache that stores data on filesystem
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*
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* $Id: File.php 10381 2008-06-01 03:35:53Z pasamio $
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*
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* Possible parameters for the cache are:
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* - cacheFolder : set the folder from which to load the cache
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* - lifetime : seconds for which the cache is valid, if set to auto, it will check
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* whether the cache is older than the original file (if the reader supports this)
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* - prefix for the filenames
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*
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* @package patTemplate
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* @subpackage Caches
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* @author Stephan Schmidt <schst@php.net>
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*/
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class patTemplate_TemplateCache_File extends patTemplate_TemplateCache
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{
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/**
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* parameters of the cache
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*
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* @access private
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* @var array
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*/
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var $_params = array(
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'cacheFolder' => './cache',
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'lifetime' => 'auto',
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'prefix' => '',
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'filemode' => null
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);
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/**
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* load template from cache
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*
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* @access public
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* @param string cache key
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* @param integer modification time of original template
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* @return array|boolean either an array containing the templates or false cache could not be loaded
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*/
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function load($key, $modTime = -1)
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{
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$filename = $this->_getCachefileName( $key );
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if (!file_exists($filename) || !is_readable($filename)) {
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return false;
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}
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$generatedOn = filemtime( $filename );
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$ttl = $this->getParam('lifetime');
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if ($ttl == 'auto') {
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if ($modTime < 1) {
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return false;
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}
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if ($modTime > $generatedOn) {
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return false;
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}
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return unserialize(file_get_contents($filename));
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} elseif(is_int( $ttl)) {
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if ($generatedOn + $ttl < time()) {
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return false;
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}
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return unserialize( file_get_contents( $filename ) );
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}
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return false;
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}
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/**
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* write template to cache
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*
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* @access public
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* @param string cache key
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* @param array templates to store
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* @return boolean true on success
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*/
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function write( $key, $templates )
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{
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$cacheFile = $this->_getCachefileName($key);
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$fp = @fopen($cacheFile, 'w');
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if (!$fp) {
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return false;
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}
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flock( $fp, LOCK_EX );
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fputs( $fp, serialize($templates));
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flock( $fp, LOCK_UN );
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$filemode = $this->getParam('filemode');
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if ($filemode !== null) {
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chmod($cacheFile, $filemode);
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}
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return true;
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}
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/**
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* get the cache filename
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*
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* @access private
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* @param string cache key
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* @return string cache file name
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*/
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function _getCachefileName( $key )
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{
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return $this->getParam( 'cacheFolder' ) . '/' . $this->getParam( 'prefix' ).$key . '.cache';
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}
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}
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?>
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