(PHP 4 >= 4.0.4, PHP 5, PHP 7) Returns the value of a constant

(PHP 4, PHP 5, PHP 7)

Examples: There is only one value of type

(PHP 4 >= 4.1.0, PHP 5, PHP 7) HTTP Cookies An

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

(PHP 5 >= 5.5.0, PHP 7) Get the yielded value

Examples: References and Objects One of the key-points of PHP 5 OOP that is often

Examples: self:: usage Static references to the current class like self::

(PHP 5 >= 5.0.0, PHP 7) Assign a value to the specified offset

Examples: Sleep and wakeup