Extracts a node from top of the heap and sift up.

SplHeap::extract

(PHP 5 >= 5.3.0)

SplHeap::extractExtracts a node from top of the heap and sift up.

Description

mixed SplHeap::extract ( void )

Parameters

This function has no parameters.

Return Values

The value of the extracted node.

Errors/Exceptions

Throws RuntimeException when the data-structure is empty.


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