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This document uses PHP Chinese website manual Release
Example #1 使用 imagecopymerge() 函数创建半透明水印
<?php
// 加载要加水印的图像
$im = imagecreatefromjpeg ( 'photo.jpeg' );
// 首先我们从 GD 手动创建水印图像
$stamp = imagecreatetruecolor ( 100 , 70 );
imagefilledrectangle ( $stamp , 0 , 0 , 99 , 69 , 0x0000FF );
imagefilledrectangle ( $stamp , 9 , 9 , 90 , 60 , 0xFFFFFF );
$im = imagecreatefromjpeg ( 'photo.jpeg' );
imagestring ( $stamp , 5 , 20 , 20 , 'libGD' , 0x0000FF );
imagestring ( $stamp , 3 , 20 , 40 , '(c) 2007-9' , 0x0000FF );
// 设置水印图像的位置和大小
$marge_right = 10 ;
$marge_bottom = 10 ;
$sx = imagesx ( $stamp );
$sy = imagesy ( $stamp );
// 以 50% 的透明度合并水印和图像
imagecopymerge ( $im , $stamp , imagesx ( $im ) - $sx - $marge_right , imagesy ( $im ) - $sy - $marge_bottom , 0 , 0 , imagesx ( $stamp ), imagesy ( $stamp ), 50 );
// 将图像保存到文件,并释放内存
imagepng ( $im , 'photo_stamp.png' );
imagedestroy ( $im );
?>
[#1] mmshfe at gmail dot com [2015-02-21 09:47:33]
The second image load is not necessary:
$im = imagecreatefromjpeg('photo.jpeg');