網站-php上傳檔案出現錯誤，求大家解釋一下，怎麼修改？

php網站

一共四個檔案：
1、

 <?=SITE_NAME?>
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2、

3、

 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);}?><?=SITE_NAME?>
">

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4、

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