PHP는 imagecopymerge() 함수를 사용하여 반투명 워터마크 방법을 생성합니다.

$stamp = imagecreatetruecolor(100, 70); 
imagefilledrectangle($stamp, 0, 0, 99, 69, 0x0000FF);
imagefilledrectangle($stamp, 9, 9, 90, 60, 0xFFFFFF); 
imagestring($stamp, 5, 20, 20, 'libGD', 0x0000FF);
imagestring($stamp, 3, 20, 40, '(c) 2007-9', 0x0000FF);

$marge_right = 10; 
$marge_bottom = 10;
$sx = imagesx($stamp);
$sy = imagesy($stamp);

imagecopymerge($im, $stamp, imagesx($im) - $sx - $marge_right, imagesy($im) - $sy - $marge_bottom, 0, 0, imagesx($stamp), imagesy($stamp), 50);

imagepng($im, 'photo_stamp.png');
imagedestroy($im); 
?>