SplHeap::isEmpty
SplHeap::next
SplHeap
PHP Manual

# SplHeap::key

(No version information available, might be only in CVS)

SplHeap::key — Return current node index

### Description

mixed SplHeap::key ( void )

This function returns the current node index

### Parameters

This function has no parameters.

### Return Values

The current node index.

SplHeap::isEmpty
SplHeap::next
SplHeap
PHP Manual