Parse php generated png in html - php

Question

I got a class that generates a png showing the result on a single page
header('Content-Type: image/png');
header('Cache-Control: public, must-revalidate, max-age=0'); // HTTP/1.1
header('Pragma: public');
header('Expires: Sat, 26 Jul 1997 05:00:00 GMT'); // Date in the past
header('Last-Modified: '.gmdate('D, d M Y H:i:s').' GMT');
imagepng($png,'test.png');
imagedestroy($png);
Instead of above, that prints the png successfully, I need to use the script so it generates several dynamically created pngs and be able to parse them in an html page.
Therefore I tried to uncomment the headers and return $png:
return $png;
and on the other side parse it
$png = $obj->pngGeneratorFuntion(1,30,'blank');
imagepng($png);
imagedestroy($png);
The results looks like this
�PNG IHDR.i ��PLTE���U��~tRNS#��fIDAT�c�$=�*y ���K�S����)IEND�B`��PNG IHDR.i ��PLTE���U��~tRNS#��fIDAT�c�$i]���a�P�{O��;>IEND�B`��PNG IHDR.i ��PLTE���U��~tRNS#��fIDAT�c�$Y����a�P�OMY�)"IEND�B`��PNG IHDR.i ��PLTE���U��~tRNS#��fIDAT�c�$yZ/y ���TKX{U#8MIEND�B`��PNG IHDR.i ��PLTE���U��~tRNS#��fIDAT�c�$<�2y ���>�Sq��M�IEND�B`�
and print_r($png) gives
Resource id #7
How can I achieve this. Thanks!

Answer 1

You can try base64_encode() this if you want to insert the image directly in HTML tags:
$png = $obj->pngGeneratorFuntion(1,30,'blank');
echo '<img src="data:image/png;base64,'.base64_encode($png).'">';
But it's not a good solution to insert image data directly into HTML
You can make a separate file image_process.php and send the data to that file with $_GET parameters and return image content. Then you can use:
<img src="image_process.php?text=ImageText" alt="" />