SplPriorityQueue
PHP Manual

SplPriorityQueue::isEmpty

(PHP 5 >= 5.3.0, PHP 7)

SplPriorityQueue::isEmptyChecks whether the queue is empty.

Description

public bool SplPriorityQueue::isEmpty ( void )

Parameters

This function has no parameters.

Return Values

Returns whether the queue is empty.


SplPriorityQueue
PHP Manual