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

(PHP 4, PHP 5, PHP 7) Examples:

(PHP 5 >= 5.3.0, PHP 7) Examples:

(PHP 4, PHP 5, PHP 7) Examples:

(PHP 5 >= 5.3.0, PHP 7) Examples:

(PHP 5 >= 5.3.0, PHP 7) Examples:

(PHP 4, PHP 5, PHP 7) Examples:

Accessing local filesystem Filesystem is the default wrapper used with PHP and represents

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

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