Right now compat functions WordPress ships with, such as str_contains, are excluded from the stubs.

That means when a project's PHP version is < 8.0, PHPStan thinks the function does not exist and will report an error, even though WP actually provides this compat version

I can of course simply ignore the error in my config, but in my quick testing it seems like it should possible to include wp-includes/compat.php in the stubs, so that PHPStan will pick them up— as long as they are all still wrapped in function_exists() checks

Previously/related: #20 (though readonly is special because it's a syntax clash