[php-src] Issue #14488: Null condition is behave different in if statements

Issue: https://github.com/php/php-src/issues/14488 Author: mohammadMghi ### Description The following code: ``` //Consider confirm_by_admin equal null //The condition is not met if($this->user->confirm_by_admin == null) { return Response()->json([ "Error" => "Your account not confirm by admin" ] , 401); } //The condition is met if(is_null($this->user->confirm_by_admin)) { return Response()->json([ "Error" => "Your account not confirm by admin" ] , 401); } ``` Two snips above codes returns different results. If confirm_by_admin is null then first code snip not get run. but second get runs and it's not meaningful. ### PHP Version PHP 8.2.19 ### Operating System Ubuntu 20.04.5 LTS