resize script

[spiderworm]

Hi,

I'm writing a script that allows a user to upload images and then it checks to see if the height or width is greater than 600, if so, it resizes the whole thing down to a max width or height of 600. Its the resizing part of the script thats giving me problems, here it is, what am i doing wrong? The error I keep getting is "Warning: imagecopyresampled(): supplied argument is not a valid Image..." Any ideas?

							
							$imagehw = GetImageSize( $upload_dir.$uploadedname );
imagecopyresampled( $upload_dir."copy".$uploadedname, $upload_dir.$uploadedname, 0, 0, 0, 0, $imagehw[0], $imagehw[1], $imagehw[0], $imagehw[1]);
if( $imagehw[0] > 600 || $imagehw[1] > 600 ) {
	if( $imagehw[0] > $imagehw[1] ) {
		$percent = 600 / $imagehw[0];
	} else {
		$percent = 600 / $imagehw[1];
	}

$nwimagehw = array( $imagehw[0] * $percent, $imagehw[1] * $percent );

imagecopyresampled($upload_dir.$uploadedname, $upload_dir."copy".$uploadedname, 0, 0, 0, 0, $nwimagehw[0], $nwimagehw[1], $imagehw[0], $imagehw[1]);
}

[Weedpacket]

The first argument to [man]imagecopyresampled[/man] is supposed to be an image resource (created by one of the imagecreate functions), not a filename. Note that you're copying the contents of one image into another, so two image resources will need to have been created to use the function.