在 PHP 中将 PNG 放在 JPG 上
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Put PNG over a JPG in PHP
提问by Chris
I want to do the following in PHP:
我想在 PHP 中执行以下操作：
I have two images, a jpg and a png. I want to resize the jpg to the same size as the png then put the png on top. The PNG has transparency so I would like to preserve that so the jpg shows underneath.
我有两个图像，一个 jpg 和一个 png。我想将 jpg 调整为与 png 相同的大小，然后将 png 放在顶部。PNG 具有透明度，所以我想保留它，以便 jpg 显示在下面。
If anyone could help that would be great!
如果有人可以提供帮助，那就太好了！
Thanks
谢谢
回答by skyman
<?
$png = imagecreatefrompng('./mark.png');
$jpeg = imagecreatefromjpeg('./image.jpg');
list($width, $height) = getimagesize('./image.jpg');
list($newwidth, $newheight) = getimagesize('./mark.png');
$out = imagecreatetruecolor($newwidth, $newheight);
imagecopyresampled($out, $jpeg, 0, 0, 0, 0, $newwidth, $newheight, $width, $height);
imagecopyresampled($out, $png, 0, 0, 0, 0, $newwidth, $newheight, $newwidth, $newheight);
imagejpeg($out, 'out.jpg', 100);
?>
回答by webkul
This is the working code which i using
这是我使用的工作代码
$dest = imagecreatefrompng('mapCanvas.png');
$src = imagecreatefromjpeg('si.jpg');
imagealphablending($dest, false);
imagesavealpha($dest, true);
// Copy and merge
imagecopymerge($dest, $src, 17, 13, 0, 0, 60, 100, 100);
// Output and free from memory
header('Content-Type: image/png');
imagepng($dest);
imagedestroy($dest);
imagedestroy($src);
回答by TheJacobTaylor
Here is a link to an example that will overlay a transparent watermark onto an image. Might be your use case, might be related.
这是一个示例的链接，该示例将透明水印叠加到图像上。可能是你的用例，可能是相关的。
http://www.php.net/manual/en/image.examples.merged-watermark.php
http://www.php.net/manual/en/image.examples.merged-watermark.php
There is also a way to load JPG images, resize images, turn on alpha tracking, and export images in GD.
还有一种方法可以加载 JPG 图像、调整图像大小、打开 alpha 跟踪以及在 GD 中导出图像。
Jacob
雅各布
