(PECL ds >= 1.0.0)
Ds\PriorityQueue::isEmpty — Returns whether the queue is empty
Returns whether the queue is empty.
This function has no parameters.
Returns true
if the queue is empty, false
otherwise.
Example #1 Ds\PriorityQueue::isEmpty() example
<?php$a = new \Ds\PriorityQueue();$b = new \Ds\PriorityQueue();$a->push("a", 5);$a->push("b", 15);$a->push("c", 10);var_dump($a->isEmpty());var_dump($b->isEmpty());?>
The above example will output something similar to:
bool(false) bool(true)