Watermark Imgs in PHP

Script for watermarking images on your server

<?php
$filename = "/path/to/img.jpg";
if (realpath(__FILE__) == realpath($filename)) {
    exit();
}
$stringSize = 3;
$footerSize = ($stringSize==1) ? 12 : 15;
$footer = date('d/m/Y H:i:s');

list($width, $height, $image_type) = getimagesize($filename);
$im = imagecreatefromjpeg($filename);
imagefilledrectangle (
        $im,
        0,
        $height,
        $width,
        $height - $footerSize, imagecolorallocate($im, 49, 49, 156));

imagestring($im,
        $stringSize,
        $width-(imagefontwidth($stringSize)*strlen($footer)) - 2,
        $height-$footerSize,
        $footer,
        imagecolorallocate($im, 255, 255, 255));

header( 'Content-Type: image/jpeg' );
imagejpeg($im);