PHP file cache usage instance analysis, _ PHP Tutorial

Php file cache usage instance analysis ,. Php file cache usage example analysis, this article describes the php file cache usage. Share it with you for your reference. Details: php *** simple file cache class ** php file cache usage instance analysis,

This example describes the usage of the PHP file cache class. Share it with you for your reference. The details are as follows:

<? Php/*** simple file cache class **/class XZCache {// default cache time one hour var $ cache_time = 3600; // default cache dir var $ cache_dir = '. /cache '; public function _ construct ($ cache_dir = null, $ cache_time = null) {$ this-> cache_dir = isset ($ cache_dir )? $ Cache_dir: $ this-> cache_dir; $ this-> cache_time = isset ($ cache_time )? $ Cache_time: $ this-> cache_time;} public function saveCache ($ key, $ value) {if (is_dir ($ this-> cache_dir )) {$ cache_file = $ this-> cache_dir. '/xzcache _'. md5 ($ key); $ timedif = @ (time ()-filemtime ($ cache_file); if ($ timedif >=$ this-> cache_time) {// cached file is too old, create new $ serialized = serialize ($ value); if ($ f = @ fopen ($ cache_file, 'w ')) {fwrite ($ f, $ serialized, strlen ($ serialized); fclose ($ f) ;}$ result = 1 ;}else {echo "Error: dir is not exist. "; $ result = 0;} return $ result;}/*** @ return array * 0 no cache * 1 cached * 2 overdue */public function getCache ($ key) {$ cache_file = $ this-> cache_dir. '/xzcache _'. md5 ($ key); if (is_dir ($ this-> cache_dir) & is_file ($ cache_file) {$ timedif = @ (time () -filemtime ($ cache_file); if ($ timedif >=$ this-> cache_time) {$ result ['cached'] = 2 ;} else {// cached file is fresh enough, return cached array $ result ['value'] = unserialize (file_get_contents ($ cache_file )); $ result ['cached'] = 1 ;}} else {echo "Error: no cache"; $ result ['cached'] = 0 ;}return $ result ;}} // end of class

Example:

$cache = new XZCache();$key = 'global';$value = $GLOBALS;$cache->saveCache($key, $value);$result = $cache->getCache($key);var_dump($result);

I hope this article will help you with php programming.

Example: PHP file cache class usage. Share it with you for your reference. The details are as follows: php/*** simple file cache class **/class...