网站-php上传文件出现错误，求大家解释一下，怎么修改？

一共四个文件：
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 0){    $uploadtype = false;    switch($_FILES['uploadfile']['error']){    }}$suffix = strtolower(substr($_FILES['uploadfile']['name'],-4));    if(!valid_suffix($suffix)){    $uploadtype = false;}    if($uploadtype === false){}else{$userip = ip2long($_SERVER['REMOTE_ADDR']);$time = time();$newpath = UPLOAD_DIR . $time .'x'. $userip . $suffix;if(is_uploaded_file($_FILES['uploadfile']['tmp_name'])){if(!move_uploaded_file($_FILES['uploadfile']['tmp_name'],$newpath)){$uploadtype = false;}else{$uploadtype = true;}}else{$uploadtype = false;}}if($uploadtype === false){}else{setcookie('uploaded',$time.'x'.$userip.$suffix.'|'.$_COOKIE['uploaded'],time()+3600*24*365);}?>
">

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