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SplPriorityQueue::extract (PHP 5 >= 5.3.0, PHP 7, PHP 8) SplPriorityQueue::extract — Extracts a node from top of the heap and sift up
Apr 22, 2021 · The SplPriorityQueue::extract () function is an inbuilt function in PHP which is used to extract a node from top of the heap and sift up. Syntax: mixed SplPriorityQueue::extract() Parameters: This function does not accept any parameter. Return Value: This function returns the value/priority (or both) of the extracted node depending on the ...
Sep 7, 2025 · SplPriorityQueue::compare — Compare priorities in order to place elements correctly in the heap while sifting up SplPriorityQueue::count — Counts the number of elements in the queue SplPriorityQueue::current — Return current node pointed by the iterator SplPriorityQueue::extract — Extracts a node from top of the heap and sift up
In the priorityQueue->insert(value, priority) method of the SplPriorityQueue class, the second parameter, priority, specifies the priority of the element being inserted. The queue uses this priority to order its elements, ensuring that elements with higher priority values will be extracted before those with lower priority values.
Methods public __construct () — Constructs a new empty queue compare () — Compare priorities in order to place elements correctly in the heap while sifting up. count () — Counts the number of elements in the queue. current () — Return current node pointed by the iterator extract () — Extracts a node from top of the heap and sift up.
The SplPriorityQueue class provides the main functionalities of a prioritized queue, implemented using a max heap. Note: The order of elements with identical priority is undefined. It may differ from the order in which they have been inserted.
SplPriorityQueue::extract — Extracts a node from top of the heap and sift up. SplPriorityQueue::insert — Inserts an element in the queue by sifting it up. SplPriorityQueue::isEmpty — Checks whether the queue is empty.
