Apa sih itu watermark, itu loh credits yang suka nempel di pojok kanan bawah foto atau malah di tengah2 foto dengan efek transparan, ini berguna untuk yang nngak mau capek pake aplikasi watermarking di desktop bisa di pakai di web jadi pas kita upload foto, maka otomatis gmabar langsung di watermark.
<?php
// Load the stamp and the photo to apply the watermark to
$img_gen = $_POST['img'];
$stempel = $_POST['stemp'];
$stamp = imagecreatefrompng($stempel);
$im = imagecreatefromjpeg($img_gen);
// Set the margins for the stamp and get the height/width of the stamp image
$marge_right = 10;
$marge_bottom = 10;
$sx = imagesx($stamp);
$sy = imagesy($stamp);
// Copy the stamp image onto our photo using the margin offsets and the photo
// width to calculate positioning of the stamp.
imagecopy($im, $stamp, imagesx($im) - $sx - $marge_right, imagesy($im) - $sy - $marge_bottom, 0, 0, imagesx($stamp), imagesy($stamp));
// Output and free memory
header('Content-type: image/png');
imagepng($im);
imagedestroy($im);
?>
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