Ds\Queue::pop

(PECL ds >= 1.0.0)

Ds\Queue::pop — Removes and returns the value at the front of the queue.

说明

public mixed Ds\Queue::pop ( void )

Removes and returns the value at the front of the queue.

参数

此函数没有参数。

返回值

The removed value which was at the front of the queue.

错误／异常

UnderflowException if empty.

范例

Example #1 Ds\Queue::pop() example


<?php
$queue = new \Ds\Queue();

$queue->push("a");
$queue->push("b");
$queue->push("c");

var_dump($queue->pop());
var_dump($queue->pop());
var_dump($queue->pop());
?>

以上例程的输出类似于：

string(1) "a"
string(1) "b"
string(1) "c"

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