Warning: Undefined variable $argv in C:\xampp2\htdocs\streaming\instagram\commandLine.php on line 3

Fatal error: Uncaught TypeError: in_array(): Argument #2 ($haystack) must be of type array, null given in C:\xampp2\htdocs\streaming\instagram\commandLine.php:3 Stack trace: #0 C:\xampp2\htdocs\streaming\instagram\commandLine.php(3): in_array('-a', NULL) #1 {main} thrown in C:\xampp2\htdocs\streaming\instagram\commandLine.php on line 3