How to Merge Transparent Png with Image Using PHP

Combine 2-3 transparent PNG images on top of each other with PHP

$image_1 = imagecreatefrompng('image_1.png');
$image_2 = imagecreatefrompng('image_2.png');
imagealphablending($image_1, true);
imagesavealpha($image_1, true);
imagecopy($image_1, $image_2, 0, 0, 0, 0, 100, 100);
imagepng($image_1, 'image_3.png');

How to merge transparent PNG with image using PHP?

You can merge the two images together using the PHP GD2 library.

Example:

<?php
 # If you don't know the type of image you are using as your originals.
 $image = imagecreatefromstring(file_get_contents($your_original_image));
 $frame = imagecreatefromstring(file_get_contents($your_frame_image));

 # If you know your originals are of type PNG.
 $image = imagecreatefrompng($your_original_image);
 $frame = imagecreatefrompng($your_frame_image);

 imagecopymerge($image, $frame, 0, 0, 0, 0, 50, 50, 100);

 # Save the image to a file
 imagepng($image, '/path/to/save/image.png');

 # Output straight to the browser.
 imagepng($image);
?>

Merging multiple transparent PNG images with php

I think you have to use imagesavealpha(): http://www.php.net/manual/en/function.imagesavealpha.php

Info: "You have to unset alphablending (imagealphablending($im, false)), to use it."

php merge transparent png image to jpeg preventing the white background

Use imagecopy

imagecopy($dest_image, $src, ($offset + 250), $offset, 0, 0, imagesx($src),imagesy($src));

How merge image on background png image in php

You are copying a JPEG image over the background image.

JPEG doesn't support transparency.

What you could do with the gd library is:

Create a new result image of the desired size, then
Copy the JPEG (user picture) to its center, then
Copy the partially-transparent PNG background (actually foreground) over result image. The PNG background must have a "transparent window" in the middle so that the user picture doesn't get hidden behind the background (in other words, the white circle part of the background must be transparent).