Null to Non-Nullable Arguments for Internal Functions
Internal Function:
bool(null)
User Function:
TypeError: my_str_contains(): Argument #2 ($needle) must be of type string, null given
PHP 8.1 will start throwing a deprecation warning:
Deprecated: Passing null to argument of type string is deprecated
PHP 9.0 will then make this a %TypeError%:
TypeError: str_contains(): Argument #2 ($needle) must be of type string, null given