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PHP: Handbuch

PHP Handbuch der PHP-Dokumentationsgruppe php.net

PHP Handbuch
Zurück	Kapitel 18. Classes and Objects (PHP 5)	Weiter

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.

Beispiel 18-9. 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 */
?>

Zurück	Zum Anfang	Weiter
Static Keyword	Nach oben	Object Abstraction

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