Help with image resizing

hi all,

i choose a image file from form field and upload. but the browser shows such errors:
Notice: Undefined variable: uploadfile in c:\program files\apache group\apache\htdocs\u-r\upload.php on line 20

Notice: Undefined variable: uploadfile in c:\program files\apache group\apache\htdocs\u-r\upload.php on line 23

Warning: imagecopyresampled(): supplied argument is not a valid Image resource in c:\program files\apache group\apache\htdocs\u-r\upload.php on line 37

Notice: Undefined index: uploadfile in c:\program files\apache group\apache\htdocs\u-r\upload.php on line 42

Warning: imagedestroy(): supplied argument is not a valid Image resource in c:\program files\apache group\apache\htdocs\u-r\upload.php on line 45

could anyone help me, please. here is the resizing code:

<?php
$uploadedfile = $_FILES['uploadfile']['tmp_name'];
$src = imagecreatefromjpeg($uploadfile);
list($width,$height)=getimagesize($uploadfile);

$newwidth=260;
$newheight=195;
$tmp=imagecreatetruecolor($newwidth,$newheight);

imagecopyresampled($tmp,$src,0,0,0,0,$newwidth,$newheight,$width,$height);

$filename = "../images". $_FILES['uploadfile']['name'];

imagedestroy($src);
imagedestroy($tmp);
?>

 

Have you got the right libraries installed on your server?

 

yes. gd enabled.

 

Just read! You've named the variable $uploadEDfile and later on you use $uploadfile.