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Last updated: Fri, 22 Jun 2007

next

(PHP 3, PHP 4 , PHP 5)

next --  将数组中的内部指针向前移动一位

说明

mixed next ( array array)

返回数组内部指针指向的下一个单元的值,或当没有更多单元时返回 FALSE

next()current() 的行为类似,只有一点区别,在返回值之前将内部指针向前移动一位。这意味着它返回的是下一个数组单元的值并将数组指针向前移动了一位。如果移动指针的结果是超出了数组单元的末端,则 next() 返回 FALSE

警告

如果数组包含空的单元,或者单元的值是 0 则本函数碰到这些单元也返回 FALSE。要正确遍历可能含有空单元或者单元值为 0 的数组,参见 each() 函数。

例子 1. next() 及相关函数的用法示例

<?php
$transport
= array('foot', 'bike', 'car', 'plane');
$mode = current($transport); // $mode = 'foot';
$mode = next($transport);    // $mode = 'bike';
$mode = next($transport);    // $mode = 'car';
$mode = prev($transport);    // $mode = 'bike';
$mode = end($transport);    // $mode = 'plane';
?>

参见 current()end()prev()reset()




add a note add a note User Contributed Notes
next
bm at ANTISPAM dot solidwave dot com
17-Apr-2004 12:49
Take care when replacing code using reset()/next() with code using foreach as foreach does not update the array's internal pointer.  This means you cannot, say, use next() to skip an element in foreach loop, or use current() within a function to get a reference to the current element.  You probably have code depending on this internal pointer and replacing it will be more work than you anticipated.

See http://www.php.net/foreach

<natsortpos>
 Last updated: Fri, 22 Jun 2007
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