Deprecated function: preg_match(): Passing null to parameter #2 ($subject) of type string is deprecated in getid3_jpg->CastAsAppropriate()

[avdeijk]

Describe the bug
Using james-heinrich/getid3 on PHP8.1 triggers the following deprecation notice:

Deprecated function: preg_match(): Passing null to parameter #2 ($subject) of type string is deprecated in getid3_jpg->CastAsAppropriate() (line 194 of [..]/vendor/james-heinrich/getid3/getid3/module.graphic.jpg.php)

This happens only for some images where the exif value for a certain keys has a value of null.

To Reproduce
Use PHP8.1

Expected behavior
Using PHP8.1 does not trigger a deprecation notice when the value for a certain exif key is null.

[avdeijk]

See pull request #406

[StudioMaX]

Could you please attach any such image? I tested on my collection even on PHP 8.2, didn't seen deprecations in this part.

[avdeijk]

Here is an image on which I got a deprecation notice.

[JamesHeinrich]

I tried this image and didn't see any problems on PHP 7.4.1 or 8.0.11

[StudioMaX]

This warning appeared since PHP 8.1.
https://3v4l.org/WhV7V

[JamesHeinrich]

I finally got a PHP 8.2 test environment set up. Once I had that it was easy to find and fix the problem(s).
a61d9c5