PROBLEM SKRYPT UPLOAD.PHP LINIA 51, Witam mam problem! [ZAJRZYJ] Opcje

[MrCandiPL]

Witam mam problem a niewiem gdzie pisze mi że jest to linia [51] ale niewiem jaki jest tam błąd.

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<?php
 
$site_name = $_SERVER['HTTP_HOST'];
$url_dir = "http://".$_SERVER['HTTP_HOST'].dirname($_SERVER['PHP_SELF']);
$url_this =  "http://".$_SERVER['HTTP_HOST'].$_SERVER['PHP_SELF'];
 
$upload_dir = "/";
$upload_url = $url_dir."/";
$message ="";
 
//create upload_files directory if not exist
//If it does not work, create on your own and change permission.
if (!is_dir("upload_files")) {
        die ("upload_files directory doesn't exist");
}
 
if ($_FILES['userfile']) {
        $message = do_upload($upload_dir, $upload_url);
}
else {
        $message = "Invalid File Specified.";
}
 
print $message;
 
function do_upload($upload_dir, $upload_url) {
 
        $temp_name = $_FILES['userfile']['tmp_name'];
        $file_name = $_FILES['userfile']['name'];
        $file_type = $_FILES['userfile']['type'];
        $file_size = $_FILES['userfile']['size'];
        $result    = $_FILES['userfile']['error'];
        $file_url  = $upload_url.$file_name;
        $file_path = $upload_dir.$file_name;
 
        //File Name Check
    if ( $file_name =="") {
        $message = "Invalid File Name Specified";
        return $message;
    }
    //File Size Check
    else if ( $file_size > 50000000) {
        $message = "Masymalny rozmiar pliku wynosi 50MB.";
        return $message;
    }
    //File Type Check
    else if ( $file_type == "text/plain/" ) {
        $message = "Przepraszamy, nie obslugujemy takich rozszezen!" ;
        return $message;
    }
    $result  =  move_uploaded_file($temp_name, $file_path);
    $message = ($result)?"File url <a href=$file_url>$file_url</a>" :
              "Somthing is wrong with uploading a file.";
 
    return $message;
}
?>
<form name="upload" id="upload" ENCTYPE="multipart/form-data" method="post">
  Upload Image<input type="file" id="userfile" name="userfile">
  <input type="submit" name="upload" value="Upload">
</form>  
 
[PHP] pobierz, plaintext 

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