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198 lines
5.3 KiB
198 lines
5.3 KiB
<?php
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/**
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* Class Cache
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*/
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class Cache
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{
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#const CLEAR_INCLUDE_PAGE = true;
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/**
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* Allow to cache
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* @var bool
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*/
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public $doCaching = true;
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/**
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* Allow to clear cache when does some changes via admin panel
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* @var bool
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*/
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public $autoClear = true;
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/**
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* Cache ID
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* @var bool
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*/
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public $cacheId = false;
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/**
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* Location of cache files
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* @var
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*/
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private $_cacheDir;
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/**
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* Cache some settings
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* @var
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*/
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private $_settings;
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/**
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* Initialisation of cache object
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* @param $cacheDir
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* @param $settings
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*/
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public function __construct($cacheDir, $settings)
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{
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$this->_cacheDir = $cacheDir;
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$this->_settings = $settings;
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}
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/**
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* Return cache with given parameters
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* @param $content
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* @param $content_type
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* @param $charset
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* @return string
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*/
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public function createCacheContent($content, $content_type, $charset)
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{
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$cacheContent = '<?php
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header(\'Last-Modified: ' . gmdate("D, d M Y H:i:s",time()) . ' GMT\');
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header(\'Cache-Control: public\');
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if(isset($_SERVER[\'HTTP_IF_MODIFIED_SINCE\']) && '.time().' <= strtotime($_SERVER[\'HTTP_IF_MODIFIED_SINCE\']))
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{
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header(\'HTTP/1.1 304 Not Modified\');
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exit;
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}
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else
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{
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';
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if(function_exists('xgzencode')) $cacheContent .= 'if(isset($_SERVER[\'HTTP_ACCEPT_ENCODING\']) && strpos($_SERVER[\'HTTP_ACCEPT_ENCODING\'], \'gzip\')!==false)
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{
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header(\'Content-Encoding: gzip\');
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header(\'Content-Type: '.$content_type.'; charset='.$charset.'\'); ?'.'>'.gzencode($content, 9).'<?php
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}
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else
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{
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header(\'Content-Type: '.$content_type.'; charset='.$charset.'\'); ?'.'>'.$content.'<?php
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}';
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else $cacheContent .= 'header(\'Content-Type: '.$content_type.'; charset='.$charset.'\'); ?'.'>'.$content.'<?php
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';
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$cacheContent .= '}
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?>';
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return $cacheContent;
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}
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/**
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* Save cache file
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* @param $content
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*/
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public function createChacheFile($content)
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{
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if($this->cacheId && $this->doCaching)
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{
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#$cacheFile = $this->_cacheDir . str_replace('/','%',$this->cacheId).'.cache';
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$cacheFile = $this->_cacheDir . rawurlencode(strtolower($this->cacheId)).'.cache';
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if(!file_exists($cacheFile))
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{
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$content = str_replace('<?xml','<?php echo \'<?xml\'; ?>', $content);
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$fp = @fopen($cacheFile, 'w');
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@flock($fp, 2);
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@fwrite($fp, $content);
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@flock($fp, 3);
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@fclose($fp);
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}
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}
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if(!file_exists($this->_cacheDir.'settings.php'))
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{
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$this->_createCacheSettingsFile();
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}
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}
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/**
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* Save settings file
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*/
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private function _createCacheSettingsFile()
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{
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$content = "<?php\n";
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$content .= '$settings[\'session_prefix\'] = \''.$this->_settings['session_prefix'].'\';'."\n";
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$content .= '$settings[\'index_page\'] = \''.$this->_settings['index_page'].'\';'."\n";
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#$content .= '$settings[\'caching\'] = '.$this->_settings['caching'].';'."\n";
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$content .= '?'.'>';
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$fp = @fopen($this->_cacheDir.'settings.php', 'w');
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@flock($fp, 2);
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@fwrite($fp, $content);
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@flock($fp, 3);
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@fclose($fp);
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}
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/**
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* Delete all cache files and settings file. If $page set delete only this page cache file.
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* @param bool $page
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*/
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public function clear($page=false)
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{
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if(!$page)
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{
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// delete all cache files (settings.php and *.cache):
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$cacheFiles = glob($this->_cacheDir . '{settings.php,*.cache}', GLOB_BRACE);
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if ($cacheFiles) {
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foreach ($cacheFiles as $cacheFile) {
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@unlink($cacheFile);
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}
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}
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}
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else
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{
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// delete cache files of a specifid page:
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$page = rawurlencode(strtolower($page));
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// select page.cache and page,*.caсhe
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$cacheFiles = glob($this->_cacheDir . '{' . $page . '.cache,' . $page . '%2C*.cache}', GLOB_BRACE);
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if ($cacheFiles) {
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foreach ($cacheFiles as $cacheFile) // "%2C" = ","
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{
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@unlink($cacheFile);
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}
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}
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}
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}
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/**
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* Delete photo cache file
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* @param $id
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*/
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public function clearPhoto($id)
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{
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// select *,photo,[id].cache and *,photo,[id],*.cache
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$cacheFiles = glob($this->_cacheDir . '{*%2C' . IMAGE_IDENTIFIER . '%2C' . $id . '.cache,*%2C' . IMAGE_IDENTIFIER . '%2C' . $id . '%2C*.cache}', GLOB_BRACE);
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if ($cacheFiles) {
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foreach ($cacheFiles as $cacheFile) {
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@unlink($cacheFile);
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}
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}
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}
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/**
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* Clear cache of overview pages
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* @param $page
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*/
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function clearRelated($page)
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{
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$dbr = Database::$content->prepare("SELECT include_page FROM ".Database::$db_settings['pages_table']." WHERE lower(page)=lower(:page) LIMIT 1");
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$dbr->bindParam(':page', $page, PDO::PARAM_STR);
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$dbr->execute();
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$data = $dbr->fetch();
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if(isset($data['include_page']))
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{
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$dbr2 = Database::$content->prepare("SELECT page, type FROM ".Database::$db_settings['pages_table']." WHERE id=:id LIMIT 1");
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$dbr2->bindParam(':id', $data['include_page'], PDO::PARAM_INT);
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$dbr2->execute();
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$data2 = $dbr2->fetch();
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if(isset($data2['page']))
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{
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#if($data2['type']=='news')
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# {
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$this->clear($data2['page']);
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# }
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}
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}
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}
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}
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?>
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