PHP Fatal error: Uncaught TypeError: addNumbers(): Argument #2 ($b) must be of type int, string given, called in /home/mSJHBX/prog.php on line 6 and defined in /home/mSJHBX/prog.php:3 Stack trace: #0 /home/mSJHBX/prog.php(6): addNumbers() #1 {main} thrown in /home/mSJHBX/prog.php on line 3