Whats the best image upload resize script for pngs?

[ccrevcypsys]

I need an image resize script for pngs. I have this so far it uploads them but it doesnt resize them and i need to resize them so if someone can direct me in the right direction that would be awsome!

 

<?php
$date_str=date('Ymdhis');
$uploadFileName = str_replace(array(" ","%20"),"_",$_FILES['image']['name']);

if (is_uploaded_file($_FILES['image']['tmp_name'])) {
	$savefile = "../images/upload/".$date_str."_".$uploadFileName;

if (move_uploaded_file($_FILES['image']['tmp_name'], $savefile)) {
	@chmod($savefile, 0644);
$record = $date_str."_".$uploadFileName;
	}
	} 
?>

[ccrevcypsys]

and every script that i have tried using will not work...