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

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

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

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

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

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

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