ini_set("display_errors", "1");

$image_src = 'images.jpg';

$watermark_src = 'watermark.jpg';

$opacity = 30;

$padding = 20;

$image = imagecreatefromjpeg($image_src);

$watermark = imagecreatefromjpeg($watermark_src);

list($image_width, $image_height) = getimagesize($image_src);

list($watermark_width, $watermark_height) = getimagesize($watermark_src);

$final_x = $image_width - $watermark_width - $padding;

$final_y = $image_height - $watermark_height - $padding;

imagecopymerge($image, $watermark, $final_x, $final_y, 0, 0, $watermark_width, $watermark_height, $opacity);

header("Content-type: image/jpeg");

imagejpeg($image, null, 100);

imagedestroy($image);

imagedestroy($watermark);

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