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

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

(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 4, PHP 5, PHP 7) Alias of

(PHP 4, PHP 5, PHP 7) Set whether a client disconnect should abort script execution