WeakMap
PHP Manual

WeakMap::offsetExists

(PECL weakref >= 0.2.0)

WeakMap::offsetExistsChecks whether a certain object is in the map

설명

public bool WeakMap::offsetExists ( object $object )

Checks whether the passed object is referenced in the map.

인수

object

Object to check for.

반환값

Returns TRUE if the object is contained in the map, FALSE otherwise.


WeakMap
PHP Manual