Put PNG over a JPG in PHP [duplicate]

Question

This question already has an answer here:

• Transparent PNG over JPG in PHP 2 answers

I want to do the following in PHP:

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.

If anyone could help that would be great!

Thanks

Answer 1

<?
$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);
?>

Answer 2

This is the working code which i using

$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);

Answer 3

Here is a link to an example that will overlay a transparent watermark onto an image. Might be your use case, might be related.

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.

Jacob