Php Data file cache code example-php Tutorial

Php Data file cache code instance

Class DataCache { /** * Array conversion * * @ Param array $ array * @ Param string $ arrayName * @ Param array $ level * * @ Return string */ Private function arrayEval ($ array, $ arrayName = '', $ level = 0) { $ Space = str_repeat ("t", $ level ); If (emptyempty ($ arrayName )) { $ Evaluate = "arrayn $ space (n "; } Else { $ Evaluate = "$ {$ arrayName} = arrayn $ space (n "; } $ Space2 = str_repeat ("t", $ level + 1 ); $ Comma = $ space2; If (! Emptyempty ($ array )) { Foreach ($ array as $ key => $ val) { $ Key = is_string ($ key )? '''. Addcslashes ($ key, ''\ '). ''': $ key; $ Val =! Is_array ($ val )&&(! Preg_match ('/^ -? [1-9] d * $/', $ val) | strlen ($ val)> 12 )? '''. Addcslashes ($ val, ''\ '). ''': $ val; If (is_array ($ val )) { $ Evaluate. = "$ comma $ key =>". arrayEval ($ val, '', $ level + 1 ); } Else { $ Evaluate. = "$ comma $ key => $ val "; } $ Comma = ", n $ space2 "; } } $ Evaluate. = "n $ space )"; // A ";" is required at the end. If ($ level = 0) { $ Evaluate. = ";"; } Return $ evaluate; } /** * Write cache * * @ Param string $ path * @ Param string $ arrayName * @ Param array $ data * * @ Return boolean */ Public static function writeCache ($ path, $ arrayName, $ data) { If ($ handle = fopen ($ path, 'W + ')) { $ Data = self: arrayEval ($ data, $ arrayName ); $ DataConvert =" Flock ($ handle, LOCK_EX ); $ Rs = fputs ($ handle, $ dataConvert ); Flock ($ handle, LOCK_UN ); Fclose ($ handle ); If ($ rs! = False) { Return true; } } Return false; } } ?> Call method: /** * Generate file cache * * @ Param string $ filePath: Path to save the cached file * @ Param string $ array name in the cache file * @ Param array $ data * * @ Return boolean */ DataCache: writeCache ($ filePath, $ arrayName, $ data ); Memcache to cache data. the file cache class: /** * File cache class * File caching */ Class Cache_FileCache { /** * Set cache * @ Param $ key the key cached by the key * @ Param $ data cached content * @ Param $ cacheLife cache time (unit: Seconds) if it is 0, it indicates unlimited time * @ Return Bool */ Public static function setCache ($ key, $ data, $ cacheLife) { If (file_exists (_ SITE_FILE_CACHE )) { @ $ File = _ SITE_FILE_CACHE. "/". $ key. ". php "; $ Cache = array (); $ Time = _ SYS_TIME; $ Cache ['content'] = $ data; $ Cache ['expire '] = $ cacheLife = 0? 0: $ time + $ cacheLife; $ Cache ['mtime'] = $ time; $ Cache = serialize ($ cache ); $ SetReslut = @ file_put_contents ($ file, $ cache) or self: error (_ line __, "file write error "); $ ChmodReslut = @ chmod ($ file, 0777) or self: error (_ line __, "failed to set file permissions "); If ($ setReslut & $ chmodReslut) { Return true; } Else { Return false; } } } /** * Get cached data * @ Param $ key the key cached by the key * @ Return array */ Public static function getCache ($ key) { @ $ File = _ SITE_FILE_CACHE. "/". $ key. ". php "; If (file_exists ($ file )) { $ Data = @ file_get_contents ($ file ); $ Data = unserialize ($ data ); If ($ data ['expire '] = 0 | $ data ['expire']> _ SYS_TIME) { Return $ data ['content']; } Else { Unlink ($ file ); Return array (); } } } /** * Deleting cached files * @ Param $ key cache $ key * @ Return Bool */ Public static function delCache ($ key) { If (@ unlink (_ SITE_FILE_CACHE. "/". $ key. ". php ")) { Return true; } Else { Return false; } } /** * Clear all cached files * @ Return Bool */ Public static function clearAllCache () { $ Files = scandir (_ SITE_FILE_CACHE ); Foreach ($ files as $ val) { @ Unlink (_ SITE_FILE_CACHE. "/". $ val ); } } /** * Error handling functions * @ Param $ line: number of rows * @ Param $ msg information */ Public static function error ($ line, $ msg) { Die ("error file:". _ file _. "/n error line: $ line/n error message: $ msg "); } } ?>