Weakref::release
(PECL weakref >= 0.1.0)
Weakref::release — Releases a previously acquired reference
Описание
public bool Weakref::release
( void
)
Releases a previously acquired reference, potentially turning a strong reference back into a weak reference.
The Weakref instance maintains an internal acquired counter to track outstanding strong references. If the call to Weakref::release() is successful, this counter will be decremented by one. Once this counter reaches zero, the strong reference is turned back into a weak reference.
Список параметров
У этой функции нет параметров.
Возвращаемые значения
Returns TRUE if the reference was previously acquired and thus could be
released, FALSE otherwise.
Примеры
Пример #1 Weakref::release() example
<?php
class MyClass {
public function __destruct() {
echo "Destroying object!\n";
}
}
$o1 = new MyClass;
$r1 = new Weakref($o1);
$r1->acquire();
echo "Unsetting o1...\n";
unset($o1);
$o2 = $r1->get();
$r1->release();
echo "Unsetting o2...\n";
unset($o2);
?>
Результат выполнения данного примера:
Unsetting o1... Unsetting o2... Destroying object!
- PHP Руководство
- Функции по категориям
- Индекс функций
- Справочник функций
- Изменение поведения PHP
- Weak References
- Функция Weakref::acquire() - Acquires a strong reference on that object
- Функция Weakref::__construct() - Constructs a new weak reference
- Функция Weakref::get() - Returns the object pointed to by the weak reference
- Функция Weakref::release() - Releases a previously acquired reference
- Функция Weakref::valid() - Checks whether the object referenced still exists
Коментарии
404 Not Found