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This article mainly introduces how PHP uses the imagecopymerge() function to create a translucent watermark, which has certain reference value. Interested friends can refer to it
Using the imagecopymerge() function to create a translucent watermark , for your reference, the specific content is as follows
<?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($stamp, 9, 9, 90, 60, 0xFFFFFF); imagestring($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); ?>
Semi-transparent watermark:
this The example uses the imagecopymerge() function to merge the watermark image and the original image. We can control the transparency of the watermark, in this case 50% transparency. In actual use, the use of translucent watermarks can protect copyright without affecting users' viewing of images.
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