PHP檔案快取類樣本分享_php執行個體

複製代碼 代碼如下:
<?php
/**
* @desc 檔案快取
*/
class Cache{
const C_FILE = '/Runtime/';
private $dir = '';
const EXT = '.tpl';
private $filename = '';
public function __construct($dir = ''){
$this->dir = $dir;
}
/**
* @desc 設定檔案快取
* @param string $key 檔案名稱
* @param unkonw $data 快取資料
* @param int $expire 到期時間
*/
public function set($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 擷取檔案
* @param string $key 檔案名稱
*/
public function get($key){
//$filename = dirname(__FILE__).self::C_FILE.$this->dir.$key.self::EXT;
if(!file_exists($this->filename)){
return '快取檔案已經不存在';
}else{
$res = file_get_contents($this->filename);
}
return $res;
}
/**
* @desc 刪除檔案
* @param string $key 檔案名稱
*/
public function del($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');

