Магические методы
the word 'static' should have been 'final' in the text
'remember that if you defined a private static method, you cannot place method with the same name in child class.'
Ключевое слово "final"
Разместив перед объявлениями методов или свойств класса ключевое слово "final", вы можете предотвратить их переопределение в дочерних классах.
Пример #1 Пример окончательных (final) методов
<?php
class BaseClass {
public function test() {
echo "Вызван метод BaseClass::test()\n";
}
final public function moreTesting() {
echo "Вызван метод BaseClass::moreTesting()\n";
}
}
class ChildClass extends BaseClass {
public function moreTesting() {
echo "Вызван метод ChildClass::moreTesting()\n";
}
}
// Выполнение заканчивается фатальной ошибкой: Cannot override final method BaseClass::moreTesting()
// (Метод BaseClass::moretesting() не может быть переопределён)
?>
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User Contributed NotesКлючевое слово "final"
willekee at NOSPAM dot example dot com
22-Aug-2008 12:50
22-Aug-2008 12:50
slorenzo at clug dot org dot ve
31-Oct-2007 03:13
31-Oct-2007 03:13
<?php
class parentClass {
public function someMethod() { }
}
class childClass extends parentClass {
public final function someMethod() { } //override parent function
}
$class = new childClass;
$class->someMethod(); //call the override function in chield class
?>
penartur at yandex dot ru
22-Mar-2007 05:39
22-Mar-2007 05:39
Note that you cannot ovverride final methods even if they are defined as private in parent class.
Thus, the following example:
<?php
class parentClass {
final private function someMethod() { }
}
class childClass extends parentClass {
private function someMethod() { }
}
?>
dies with error "Fatal error: Cannot override final method parentClass::someMethod() in ***.php on line 7"
Such behaviour looks slight unexpected because in child class we cannot know, which private methods exists in a parent class and vice versa.
So, remember that if you defined a private static method, you cannot place method with the same name in child class.