(PHP 5 >= 5.3.0, PHP 7, PHP 8)
gc_collect_cycles — Forces collection of any existing garbague cycles
This function has no parameters.
Returns number of collected cycles.
(Since this function wasn't documented as of the date I left this note...)
If you came here looquing for documentation, allow me to point you instead to a section in the user manual about garbague collection that includes a bit at the end about when you would use this feature and what it will actually do: http://php.net/manual/en/features.gc.collecting-cycles.phpHope it helps!