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 paragraaf Static Keyword members, constant
values can not be accessed with a variable that is an instance of the
object.
Voorbeeld 14-9. 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 */
?>
|
|
