(PECL libevent >= 0.0.1)
Event::free — Make event non-pending and free resources allocated for this event.
Removes event from the list of events monitored by libevent, and free resources allocated for the event.
    The
    Event::free()
    method currently doesn't destruct the object itself. To destruct the
    object completely call
    unset()
    , or assign NULL.
   
This function has no parameters.
No value is returned.