Longhorn PHP 2019 Schedule

WeakMap::count

(PECL weakref >= 0.2.0)

WeakMap::countCounts the number of live entries in the map

说明

public WeakMap::count ( void ) : int

Counts the number of live entries in the map.

参数

此函数没有参数。

返回值

Returns the number of live entries in the map.

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