PHP 8.1 Deprecation: Constant FILTER_SANITIZE_STRING is deprecated

[dd32]

Learn uses the FILTER_SANITIZE_STRING filter var quite commonly, as of PHP 8.1 this has been deprecated, as it doesn't do what most people assume it does. It looks like this is one of those cases.

https://www.php.net/manual/en/filter.filters.sanitize.php#:~:text=flags%20to%200.-,FILTER_SANITIZE_STRING,-%22string%22

[jonathanbossenger]

This is mostly happening inside the WordPress.org Learn plugin. The usages will need to be reviewed.

[rollybueno]

Submitted PR on #3185