Return current node index

SplPriorityQueue::isEmpty
SplPriorityQueue::next
SplPriorityQueue
PHP Manual

# SplPriorityQueue::key

(PHP 5 >= 5.3.0)

SplPriorityQueue::key — Return current node index

### Description

public mixed SplPriorityQueue::key ( void )

This function returns the current node index

### Parameters

This function has no parameters.

### Return Values

The current node index.

SplPriorityQueue::isEmpty
SplPriorityQueue::next
SplPriorityQueue
PHP Manual