PHP K�sikirja
Edellinen | Luku 19. Classes and Objects (PHP 5) | Seuraava

# Object Constants

It is possible to define constant values on a per-class basis remaining the same and unchangeable. Constants differ from normal variables in that you don't use the $ symbol to declare or use them. Like static members, constant values can not be accessed from an instance of the object.

Esimerkki 19-15. Defining and using a constant

`<?php class MyClass { const constant = 'constant value'; function showConstant() { echo self::constant . "\n"; } } echo MyClass::constant . "\n"; $class = new MyClass(); $class->showConstant(); // echo $class::constant; is not allowed ?>`

Edellinen | Alkuun | Seuraava
Static Keyword | Ylös | Object Abstraction