ThinkPHP file cache code sharing

This article shares with you the code on the file cache class from ThinkPHP, which is very practical and efficient. we recommend it to you here for your reference. The file cache code taken from ThinkPHP is not nonsense here. let's take a look at the comments.

<? Php/*** @ desc file Cache */class Cache {const C_FILE = '/Runtime/'; private $ dir = ''; const EXT = '. tpl '; private $ filename = ''; public function _ construct ($ dir ='') {$ this-> dir = $ dir ;} /*** @ desc sets file cache * @ param string $ key file name * @ param unkonw $ data cached data * @ param int $ expire expiration time */public function set ($ key, $ data, $ expire = 0) {$ this-> filename = dirname (_ FILE __). self: C_FILE. $ this-> dir. $ key. se Lf: EXT; if (file_exists ($ this-> filename) {$ res = $ this-> get ($ key); if (md5 ($ res) = md5 (json_encode ($ data) {return true ;}} if (! Is_dir (dirname ($ this-> filename) {mkdir (dirname ($ this-> filename), 0777);} $ source = fopen ($ this-> filename, 'W + '); fwrite ($ source, json_encode ($ data); fclose ($ source );} /*** @ desc get FILE * @ param string $ key FILE name */public function get ($ key) {// $ filename = dirname (_ FILE __). self: C_FILE. $ this-> dir. $ key. self: EXT; if (! File_exists ($ this-> filename) {return 'The cache file does not exist ';} else {$ res = file_get_contents ($ this-> filename);} return $ res ;} /*** @ desc delete File * @ param string $ key file name */public function del ($ key) {unlink ($ this-> filename );}} $ data = array ('name' => 'song', 'age' => 20, 'sex' => 'man ', 'favority '=> array ('apple', 'banana'); $ cache = new Cache (); $ cache-> set ('cache', $ data ); // $ cache-> get ('cache'); // $ cache-> del ('cache ');