(PECL ds >= 1.0.0)
Ds\PriorityQueue::peek — Returns the value at the front of the queue
Returns the value at the front of the queue, but does not remove it.
�˺���û�в�����
The value at the front of the queue.
UnderflowException if empty.
Example #1 Ds\PriorityQueue::peek() example
<?php
$queue = new \Ds\PriorityQueue();
$queue->push("a", 5);
$queue->push("b", 15);
$queue->push("c", 10);
var_dump($queue->peek());
?>
�������̵���������ڣ�
string(1) "b"