imagecolorsforindex(): Argument #2 ($color) is out of range

[adrian]

Hi @horst - not sure if this is your code or Ryan's, but thought I'd ask you first. I am seeing that error when calling resize on a GIF.

It is pointing to line: 866 in /wire/core/ImageSizerEngineGD.php

The second argument is returning 255.

Perhaps the solution here: https://stackoverflow.com/questions/3874533/what-could-cause-a-color-index-out-of-range-error-for-imagecolorsforindex is what is needed.

Any thoughts?

Thanks,
Adrian

[horst]

Hi @adrian,

this is very old legacy code from before 2013 when I joined PW, - and it is from a community member named "mrx": https://github.com/processwire/processwire/blob/master/wire/core/ImageSizerEngineGD.php#L863

So, the referenced SO post seems to be the solution already. Maybe you can send me an image that has this error, so that I can test it. Or would you like to write and test the fix yourself? (As you already have done all necessary work.) ?

 

[adrian]

Thanks for your input @horst - turns out this error is new to PHP8 because they changed the behavior of the shutup operator so that it no longer silences fatal errors. I have filed an issue for Ryan with a working solution here: https://github.com/processwire/processwire-issues/issues/1299