How to merge images in PHP?

Question

I have two images which are loaded from an external URL. I want to place one image on top of another (keeping the size). I actually don't know the sizes of the images as they are from an external URL and are different each time.

So I want a function which can be called like merge($url1,$url2,$final_name). I have googled on this but none worked.

I want this 3.png :

--------------------------------------------------------------------------
                                                                          |
                              IMAGE 1                                     |
                                                                          |
                                                                          |
___________________________________________________________________________

                                                                          |
                              IMAGE 2                                     |
                                                                          |
                                                                          |
___________________________________________________________________________

$top_file = 'image1.png';
$bottom_file = 'image2.png';

$top = imagecreatefrompng($top_file);
$bottom = imagecreatefrompng($bottom_file);

// get current width/height
list($top_width, $top_height) = getimagesize($top_file);
list($bottom_width, $bottom_height) = getimagesize($bottom_file);

// compute new width/height
$new_width = ($top_width > $bottom_width) ? $top_width : $bottom_width;
$new_height = $top_height + $bottom_height;

// create new image and merge
$new = imagecreate($new_width, $new_height);
imagecopy($new, $top, 0, 0, 0, 0, $top_width, $top_height);
imagecopy($new, $bottom, 0, $top_height+1, 0, 0, $bottom_width, $bottom_height);

// save to file
imagepng($new, 'merged_image.png');

This does the job but the merged image loses its color and becomes nearly black and white like this:

enter image description here

@AkshayKhandelwal i want to use java script to write this `document.write("Hello World")` , just because i added this tag! — user4273356, Nov 21 '14 at 15:06
Just to sum up again. Do you want to load 2 images from an external url and combine them to one big image, right? — Andi, Nov 21 '14 at 15:12
Maybe take a look at: http://stackoverflow.com/questions/3876299/merging-two-images-with-php — Andi, Nov 21 '14 at 15:17
@Andi Thats for merging images on top of each other not below each other! — user4273356, Nov 21 '14 at 15:18
try this for both $top and $bot: $top = imagecreatefrompng($top_file); imageAlphaBlending($top, true); imageSaveAlpha($top, true); maybe you'll have to do this for $new instead — Andi, Nov 21 '14 at 15:26

score 1 · Answer 1 · edited Dec 12 '15 at 20:00

1

Instead of this:

// create new image and merge
$new = imagecreate($new_width, $new_height);

I used:

// create new image and merge
$new = imagecreatetruecolor($new_width, $new_height);

It worked!

Thanks!

edited Dec 12 '15 at 20:00

ArtKorchagin

4,801
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answered Nov 21 '14 at 15:37

user4273356

33
4

score 0 · Answer 2 · answered Dec 05 '21 at 21:52

i looked up ur code but i would save the folder in something like that:

$time = date('d-M-Y') . '-TIME-' . date('H-i-s');    
$save_finalimage_socialmedia = public_path("storage/image-{$time}.jpeg");
        imagejpeg($new, $save_finalimage_socialmedia);

PS: i did it in the jpeg format, so if you want, you can change in ur format (png,jpg,...) PS: @user4273356 ur code worked for me

How to merge images in PHP?

2 Answers2