Bug #80335 [Opn->Fbk]: Imagecolorat and imagecreatefrompng glitch

Edit report at https://bugs.php.net/bug.php?id=80335&edit=1 ID: 80335 Updated by: requinix@php.net Reported by: jagja870 at school dot lu Summary: Imagecolorat and imagecreatefrompng glitch -Status: Open +Status: Feedback Type: Bug Package: *Graphics related Operating System: Windows 10 PHP Version: 7.3.24 Block user comment: N Private report: N New Comment: Thank you for this bug report. To properly diagnose the problem, we need a short but complete example script to be able to reproduce this bug ourselves. A proper reproducing script starts with <?php and ends with ?>, is max. 10-20 lines long and does not require any external resources such as databases, etc. If the script requires a database to demonstrate the issue, please make sure it creates all necessary tables, stored procedures etc. Please avoid embedding huge scripts into the report. The code you posted combines file_get_contents with imagecreatefrompng. Those two will never work together. Please post the exact code you had problems with. Previous Comments: ------------------------------------------------------------------------ [2020-11-08 01:16:32] jagja870 at school dot lu Description: ------------ if you create an image source from an image file, with imagecreatefrompng($path) $path leads to a png image you will come to a bug, where if u use imagecolorat() will always return an rgb value of 0. but if you change it to imgcreatefromstring($path) and load the png file it also won't work. imagecolorat() only works with jpg files in the end. Test script: --------------- $imageSource = file_get_contents("uploads/"."myfile.png"); $imageSource = imagecreatefrompng($imageSource); for($x=0; $x<$imageX;$x++){ for($y=0;$y<$imageY;$y++){ $rgb = imagecolorat($imageSource, $x, $y); } } Expected result: ---------------- All returns get a value of 0. Actual result: -------------- The actual result should have returned the rgb value of the pixel in a png file. ------------------------------------------------------------------------ -- Edit this bug report at https://bugs.php.net/bug.php?id=80335&edit=1