(PHP 4, PHP 5, PHP 7) Returns connection status bitfield

(PHP 5 >= 5.1.3, PHP 7) Gets system load average

(PHP 4, PHP 5, PHP 7) Tells what the user's browser is capable of

(PHP 4, PHP 5, PHP 7) Equivalent to exit

(PHP 5, PHP 7) Return source with stripped comments and whitespace

(PHP 4, PHP 5, PHP 7) Alias of

(PHP 5 >= 5.1.0, PHP 7) Make the script sleep until the specified time

(PHP 4, PHP 5, PHP 7) Defines a named constant

(PHP 4, PHP 5, PHP 7) Output a message and terminate the current script

(PHP 5, PHP 7) Delay for a number of seconds and nanoseconds