php 文件锁

path=RUNTIME_PATH;
        else $this->path=$path;
        $this->lockFile=$this->path.md5($name).'.lock';
    }

    /**
     * 加锁
     */
    public function lock(){
        $this->fp=fopen($this->lockFile,'a+');
        if($this->fp===false){
            return false;
        }
        return flock($this->fp,LOCK_EX);//获取独占锁
    }

    /**
     * 解锁
     */
    public function unlock(){
        if($this->fp!==false){
            @flock($this->fp,LOCK_UN);
            clearstatcache();
        }
        @fclose($this->fp);
        @unlink($this->lockFile);
    }
}