WeakMap
PHP Manual

WeakMap::key

(PECL weakref >= 0.2.0)

WeakMap::keyReturns the current key under iteration.

설명

public object WeakMap::key ( void )

Returns the object serving as key in the map, at the current iterating position.

인수

이 함수는 인수가 없습니다.

반환값

The object key currently being iterated.


WeakMap
PHP Manual