SplHeap::valid
(PHP 5 >= 5.3.0, PHP 7)
SplHeap::valid — Check whether the heap contains more nodes
Description
public SplHeap::valid ( ) : bool
Checks if the heap contains any more nodes.
Parameters
This function has no parameters.
Return Values
Returns true if the heap contains any more nodes, false otherwise.
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https://www.php.net/manual/en/splheap.valid.php