After php receives the results returned by the shell, the solution to Chinese garbled characters_PHP tutorial

//这个函数接收的都是路径，所以判断了文件扩展名 
function shell2txt($a){
    $ary = explode('/', $a);
    foreach($ary as $k => $v){
            if(strpos($v, '?\\') !== false){
                    $_ary = explode('?\\', $v);

                    foreach($_ary as $_k=>$_v){
                            if($_v == '') continue;
                            //判断是否有文件扩展名
                            $end = '';
                            if(strpos($_v, '.') !== false){
                                    $end = substr($_v, strpos($_v, '.'));
                            }
                            $_ary[$_k] = dechex($_v).$end;
                    }

                    $ary[$k] = implode('%', $_ary);
            }
    }

    $a = implode('/', $ary);
    return  urldecode($a);
}