Warning: Undefined variable $argv in /var/www/html/index.php on line 25

Fatal error: Uncaught TypeError: in_array(): Argument #2 ($haystack) must be of type array, null given in /var/www/html/index.php:25 Stack trace: #0 /var/www/html/index.php(25): in_array('generate', NULL) #1 {main} thrown in /var/www/html/index.php on line 25