PHP Fatal error: Uncaught TypeError: Argument 2 passed to addNumbers() must be of the type integer, string given, called in /home/bWN0Ml/prog.php on line 6 and defined in /home/bWN0Ml/prog.php:3 Stack trace: #0 /home/bWN0Ml/prog.php(6): addNumbers(5, '5 days') #1 {main} thrown in /home/bWN0Ml/prog.php on line 3