PHP file caching class example sharing, _PHP tutorial-PHP Tutorial-php.cn

PHP file caching class example sharing, _PHP tutorial

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Release： 2016-07-13 10:08:30

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PHP file caching class example sharing,

Copy code The code is as follows:

    /**
* @desc file cache
*/
    class Cache{
        const C_FILE = '/Runtime/';
        private $dir = '';
        const EXT = '.tpl';
        private $filename = '';
        public function __construct($dir = ''){
            $this->dir = $dir;
        }
        /**
   */
        public function set($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);
        }
        /**
   * @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 '缓存文件已经不存在';
            }else{
                $res = file_get_contents($this->filename);
            }
            return $res;
        }
        /**
* @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');