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PHP Manual [WeakMap

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PHP Manual || WeakMap

(PECL weakref >= 0.2.0)

WeakMap::keyReturns the current key under iteration


public WeakMap::key ( void ) : object

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


This function has no parameters.

Return Values

The object key currently being iterated.

PHP Manual || WeakMap