用PHP叠加图像 [英] Superimpose Images with PHP

问题描述

我正在寻找一种在现有图像上叠加图像的方法。

I am searching for a way to overlay an image on an existing image.

例如：

+

我在这里找到了一个很好的例子：使用一个图像元素进行PNG覆盖。
但我有两个问题。

I have found a great example over here: PNG overlay using one single Image element. but I have two problems with these.

首先，我不希望维度彼此相等。例如（215 * 215 215 * 215）。这是因为我的用户可以选择他们想要放置图像的位置。 （顶部，左侧，底部，右上角）8个方向。

First of all, I don't want the dimensions to be equal to each other. e.g (215*215 on 215*215). This is because my users would have the ability to choose where they want to put their image. (Top, left, bottom, top-right) so 8 directions.

第二个问题是，在该示例中，只有2个图像是允许叠加。我的用户（再次）将能够在其上放置多个图像。

The second problem is that in that example, only 2 images are allowed to overlay. My users (again) will have the ability to put multiple images on top of it.

我对Javascript和PHP有一点了解，所以如果你的话会很棒男人（和女孩）可以帮助我。

I have a little knowledge of Javascript and PHP, so it would be great if you guys (and girls) could help me out.

真诚地，

推荐答案

您可以使用 GD 库执行此操作。有合并功能的功能称为 imagecopymerge 。

You can do this using GD library. There is function to "merge" images called imagecopymerge.

以下是合并图像的一个非常简单的示例：

Here is a very simple example how to merge images:

<?php
header('Content-Type: image/jpeg');

$bg = imagecreatefromjpeg('background.jpg');
$img = imagecreatefromjpeg('image.jpg');

imagecopymerge($bg, $img, 0, 0, 0, 0, imagesx($bg), imagesy($bg), 75);

imagejpeg($bg, null, 100);
?>

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