[11737] uses a PHP 4.3.2 function

[dd32]

Currently WordPress is set to require PHP 4.3, however [11737] introduced the usage of a PHP 4.3.2 function which is used when uploading PNG files.

3 other 4.3.2 functions are also used (imageantialias, imagesavealpha & apache_get_modules but all are checked for before being used.

[miqrogroove]

Two obvious workarounds are possible:

Use the $size variable to determine color depth.

or

Wontfix.

[dd32]

(In [13857]) Check if function exists before using it. imageistruecolor() requires PHP 4.3.2, WordPress requires 4.3.0 at this stage. Fixes #12297