(PECL weakref >= 0.2.0) Advances to the next map element

(PECL weakref >= 0.2.0) Returns the value pointed to by a certain object

(PECL weakref >= 0.2.0) Rewinds the iterator to the beginning of the map

(PECL weakref >= 0.2.0) Returns whether the iterator is still on a valid map element

(PECL weakref >= 0.2.0) Counts the number of live entries in the map

(PECL weakref >= 0.2.0) Returns the current value under iteration

(PECL weakref >= 0.2.0) Updates the map with a new key-value pair

(PECL weakref >= 0.2.0) Checks whether a certain object is in the map

(PECL weakref >= 0.2.0) Returns the current key under iteration.

(PECL weakref >= 0.2.0) Removes an entry from the map