PHP Manual Function Reference Other Basic Extensions SPL Datastructures SplHeap SplHeap::insert SplHeap::extract SplHeap::isEmpty SplHeap::insert (PHP 5 >= 5.3.0)SplHeap::insert — Inserts an element in the heap by sifting it up. Description public void SplHeap::insert ( mixed $value ) Insert value in the heap. Parameters value The value to insert. Return Values No value is returned.