使用php为图像添加“水印” [英] Add 'Watermark' to images with php

问题描述

我有一个用户可以上传图片的网站...

I have a website where users may upload images...

我需要在图片上传后添加我的徽标（水印）。

I need to add my logo (watermark) to the images once they are uploaded.

我该怎么办？

重要的是水印位于可见的角落，例如，我已经看到了即时生成水印的网站，并将标记放在主图像背景为相同颜色的地方，因此如果您知道我的意思，水印就会突出显示。

And it is important that the watermark is in a corner where it will be visible, for example I have seen websites which generates a watermark on the fly, and puts the mark wherever the background of the main image is "the same color" so the watermark sticks out if you know what I mean.

有人有一个很好的教程或文章吗？
或者知道php中我需要找到水印位置的任何函数？

Anybody have a good tutorial or article about this? Or know of any function in php which I would need to find the position of the watermark?

推荐答案

A < PHP手册中的href =http://www.php.net/manual/en/image.examples-watermark.php =noreferrer>好的例子：

// Load the stamp and the photo to apply the watermark to
$stamp = imagecreatefrompng('stamp.png');
$im = imagecreatefromjpeg('photo.jpeg');

// 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);

这篇关于使用php为图像添加“水印”的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！