[RESOLVED] Checking File Extension

[dclamp]

i have some code that checks to see if the file ext is a valid picture that we support. The problem is that it is a valid extension, but it returns that it isnt.

here is my code:

$image = $_FILES['image_file']['tmp_name']; 
$memberid = $_SESSION['member_id'];
$pos = strrpos($image, '.'); 
$ext = substr($image, $pos, strlen($image) - $pos);
if($ext!="jpg"&&$ext!="jpeg"&&$ext!="png"&&$ext!="tif"&&$ext!="gif") {
           $error[2] = "The file you selected is not supported by our system.";
}