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

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

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

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

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

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

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

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

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

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