Ds\Queue::pop

(PECL ds >= 1.0.0)

Ds\Queue::popRemoves 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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