Improve deprecation message for implicit nullable parameters

[nicolas-grekas]

Description

Related to https://wiki.php.net/rfc/deprecate-implicitly-nullable-types

Right now, the deprecation message looks like:

Implicitly marking parameter $arr_opts as nullable is deprecated, the explicit nullable type must be used instead

It'd be great to make this message more actionable by telling which method/function is affected.

E.g.

Implicitly marking parameter $arr_opts of the_function() as nullable is deprecated, the explicit nullable type must be used instead

PHP Version

PHP 8.4

Operating System

No response

[iluuu1994]

/cc @Girgias @kocsismate

[kocsismate]

@nicolas-grekas Thanks for the report! A long-standing wish of mine was to include the function/method name in compile-time messages as well, just like how we do it in case of TypeErrors. So here we are :)

[nicolas-grekas]

Lovely, thank you!