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简单的php缓存类分享

Aug 12, 2017 am 10:31 AM
md5phpmainuseshareencryptionfile namearticleofSimplekindcache

这篇文章主要介绍了一个php缓存类,文件名使用md5加密,大家参考使用吧

代码如下: 

<?php class Cache
{
    private $dir = "data/cache/";//定义缓存目录
    private $key = &#39;c_a_sss&#39;; // 文件名md5加密密钥
    function set_dir($dirpath)  {   
        $this->dir=$dirpath;   
        $this->make_dir($this->dir);  
    }  
    function read($key,$minutes=1)  {   
        $filename=$this->get_filename($key);   
        if($datas = @file_get_contents($filename)){     
            $datas = unserialize($datas);     
            if(time() - $datas[&#39;time&#39;] < $minutes*60) {      
                return $datas[&#39;data&#39;];     
            }   
        }   
        return false;  
    }    
    function write($key,$data){     
        $filename=$this->get_filename($key);  
        if($handle = fopen($filename,&#39;w+&#39;)) {    
            $datas = array(&#39;data&#39;=>$data,&#39;time&#39;=>time());    
            flock($handle,LOCK_EX);    
            $rs = fputs($handle,serialize($datas));   
            flock($handle,LOCK_UN);    
            fclose($handle);    
            if($rs!==false){
                return true;
              }   
        }  
    return false;  
    }  
    function clear_all(){   
        $dir=$this->dir;   
        $this->del_file($dir);  
    }     
    private function get_filename($key){   
        return $this->dir.$key.&#39;_&#39;.md5($key.$this->key);  
    }  
    private function make_dir($path){   
        if (! file_exists ( $path )) {    
            $this->make_dir ( dirname ( $path ) );    
            if (! mkdir ( $path, 0777 ))    
                die ( &#39;无法创建缓存文件夹&#39; . $path );  
        }  
    }  
    private function del_file($dir){    
        if (is_dir($dir)){     
            $dh=opendir($dir);//打开目录
// //列出目录中的所有文件并去掉 . 和 ..
     while (false !== ( $file = readdir ($dh))) {      
         if($file!="." && $file!="..") {   
             $fullpath=$dir."/".$file;      
             if(!is_dir($fullpath)) {       
                 unlink($fullpath);      
             } else {        
                 $this->del_file($fullpath);      
             }      
         }    
     }    
            closedir($dh);   
        }  
    }  
}   
$cache = new cache();   
$cache->set_dir(&#39;data/cache_dir/&#39;);  
$data=$cache->read(&#39;sys&#39;,1);   
if(empty($data)){   
$data=array(&#39;aa&#39;=>1111,&#39;bb&#39;=>2222,&#39;date&#39;=>date(&#39;Y-m-d H:i:s&#39;));    
$cache->write(&#39;sys&#39;,$data);}   
print_r($data);


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