Great PHP image resize code 4 thumbnails

This works just great!! check it out. Thumbs are created from those very images displayed with lightbox!

This will resize your image but it won't stretch it and it'll keep right proportions. Basically this crops your image to fit the best.

function createThumb($source,$dest) {
$thumb_size = 230; // square thumbs
$size = getimagesize($source);
$width = $size[0];
$height = $size[1];

// you might comment this to make regular thumbs and add a thumb width var. keep this for square thumbs
if($width> $height) {
$x = ceil(($width - $height) / 2 );
$width = $height;
} else if ($height> $width) {
$y = ceil(($height - $width) / 2);
$height = $width;
}

$new_im = ImageCreatetruecolor($thumb_size,$thumb_size);
$im = imagecreatefromjpeg($source);
imagecopyresampled($new_im,$im,0,0,$x,$y,$thumb_size,$thumb_size,$width,$height);
imagejpeg($new_im,$dest,100);
}