Code about the thinkphp file cache class

This article to you to share is taken from the thinkphp in the file cache class code, very practical, very good efficiency, here is recommended to everyone, there is a need for the small partners under the reference.

The file cache class code taken from thinkphp, here is not much nonsense, the small partners to read 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 set File cache * @param string $key file name * @param unkonw $data Cache data * @param int $expire expire */Public function set ($key, $data, $expire = 0) {$this->filename = dirname (__file__). Self::c_file. $this-      >dir. $key. Self::ext;        if (file_exists ($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 ' cache file no longer exists ';      }else{$res = file_get_contents ($this->filename);    } return $res; }/** * @desc Delete file * @param string $key file name */Public Function del ($key) {unlink ($this->filenam    e);  }} $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 ');

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