SplPriorityQueue::key
(PHP 5 >= 5.3.0, PHP 7)
SplPriorityQueue::key — Return current node index
Description
public SplPriorityQueue::key ( ) : mixed
This function returns the current node index
Parameters
This function has no parameters.
Return Values
The current node index.
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https://www.php.net/manual/en/splpriorityqueue.key.php