Deprecated Standard Library call

Reports the calls to Standard PHP Library functions that are deprecated starting from PHP 8.1.

The following calls are reported:

• key(), current(), next(), prev(), and reset() calls with objects as arguments.

• mb_check_encoding() calls without arguments.

• get_class(), get_parent_class() and get_called_class() calls without arguments.

• IntlCalendar::roll() calls with a Boolean passed as the $value argument.

• ctype_*() calls with non-string arguments.

See PHP RFC: Deprecations for PHP 8.1 for details.