phpThumb issue with ModX 2.8.6 and PHP 5.6

[halftrainedharry]

This problem is related to this issue with PHP 7.4:

MODX 2.8.6/3.0.4 + PHP 7.4 breaks thumbnails in the manager

Summary The version of phpThumb that comes with MODX 2.8.6 has a line of code that throws a fatal error in PHP 7.4. (The phpThumb library is used in the MODX manager to generate the thumbnails in the media browser and the preview for image TVs.) Step to fix the issue To fix the issue, remove the word mixed from this line in the file core/model/phpthumb/phpthumb.class.php Alternatively change the PHP version to at least 8.0. Related issue on Github Environment MODX 2.8.6-pl PHP 7.4

I did create a pull request on Github that fixes the problem for PHP 7.4.

Fix TypeError for PHP 7.4

This pull request won’t fix the (different) error in PHP 5.6.
Create another pull request if you want it fixed.