/*递归删除目录及目录下的文件*/

function del_dir($dir){

    $files = new DirectoryIterator($dir);

    foreach ($files as $fileInfo) {

        if($fileInfo->isDot()){

            continue;

        }

        $filename = $fileInfo->getPathname();

        if($fileInfo->isDir()){

            del_dir($filename);

        }else{

            unlink($filename);

        }

    }

    if(rmdir($dir)) {

        return true;

    } else {

        return false;

    }

}