update : 2015.11.03
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Returns the value pointed to by a certain object
WeakMap
PHP Manual

WeakMap::offsetGet

(PECL weakref >= 0.2.0)

WeakMap::offsetGet — Returns the value pointed to by a certain object

설명

public mixed WeakMap::offsetGet ( object $object )

Returns the value pointed to by a certain object.

인수

object

Some object contained as key in the map.

반환값

Returns the value associated to the object passed as argument, NULL otherwise.

WeakMap
PHP Manual