Getting the width&height of image?

is there any way, in php, to determine the width and height of an image that is already uploaded?

I remember reading something on php.net but forgot the command..

Thanks for any help :)

getimagesize

PHP Code:

---

<?php
list($width, $height, $type, $attr) = getimagesize("image_name.gif");
?>

---

Whatever file

Ty ;)
+REP if i can.