(PHP 4, PHP 5, PHP 7) Array of arguments passed to script

(PHP 4, PHP 5, PHP 7) Unpack data from binary string

(PHP 4, PHP 5, PHP 7) Delay execution int sleep

(PHP 4, PHP 5, PHP 7) Pack data into binary string

(PHP 4 >= 4.1.0, PHP 5, PHP 7) HTTP POST variables