function make_thumb($src, $dest, $desired_width) { /* read the source image */ $source_image = imagecreatefromjpeg($src); $width = imagesx($source_image); $height = imagesy($source_image); /* find the "desired height" of this thumbnail, relative to the desired width */ $desired_height = floor($height * ($desired_width / $width)); /* create a new, "virtual" image */ $virtual_image = imagecreatetruecolor($desired_width, $desired_height); /* copy source image at a resized size */ imagecopyresampled($virtual_image, $source_image, 0, 0, 0, 0, $desired_width, $desired_height, $width, $height); /* create the physical thumbnail image to its destination */ imagejpeg($virtual_image, $dest); }