Resizing image files

Hello everyone,

Is there a way to resize an image file, save it in it's new format and then
upload it to a server ? I've been through a few tutorials, that don't
work... I can figure out the uploading part, but the resizing and then
saving illudes me.

Any help would be great.

Chris

function PzMakeThumb()
{
$handle = opendir('./img');

while (false !== ($filename = readdir($handle)))
{
if ($filename != "." && $filename != "..")
{
$size = getimagesize("./img/$filename");
$src_width = $size[0];
$src_height = $size[1];

$dest_height = 100;
$dest_width = $dest_height*$src_width/$src_height;

$src_img = imagecreatefromjpeg("./img/$filename");
$dst_img =
imagecreatetruecolor($dest_width,$dest_height);
imagecopyresampled($dst_img, $src_img, 0, 0, 0, 0,
$dest_width, $dest_height, $src_width, $src_height);
imagejpeg($dst_img, "./thumbs/$filename");
imagedestroy($src_img);
imagedestroy($dst_img);
}
}
}


This function makes thumbs of all the 'img' dir with a thumb height
of$dest_height


It takes awful lots of time though ;)