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<?php $pq = new SplPriorityQueue(); //insert method inserts an element in the queue by shifting it up $pq->insert('A', 3); $pq->insert('B', 6); $pq->insert('C', -1); $pq->insert('D', 2); //count the elements echo "count ->" . $pq->count() . "<br />"; //Sets the mode of extraction (EXTR_DATA, EXTR_PRIORITY, EXTR_BOTH) $pq->setExtractFlags(SplPriorityQueue::EXTR_BOTH); //go at the node from the top of the queue $pq->top(); //iterate the queue (by priority) and display each element while ($pq->valid()) { print_r($pq->current()); $pq->next(); }

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