Fatal error: Uncaught TypeError: Argument 2 passed to add() must be of the type integer, string given, called in /home/rootone/ftp/index.php on line 13 and defined in /home/rootone/ftp/index.php:10 Stack trace: #0 /home/rootone/ftp/index.php(13): add(1, '2') #1 {main} thrown in /home/rootone/ftp/index.php on line 10