巧用rsort()和sort(),求PHP数组最大值和最小值

一、巧用rsort()求数组最大值

<?php
$fruits = array("155::武侠::http://www.movie618.com/movie/618133551.html", "1::电影618::http://www.movie618.com/", "2::窃听风云2::http://www.movie618.com/movie/618141596.html", "3::关云长::http://www.movie618.com/movie/618123753.html");
print_r($fruits);
rsort($fruits,SORT_NUMERIC);//降序排列,SORT_NUMERIC - 把值作为数字来处理,详见rsort()的用法
print_r($fruits);
?>

 查看rsort()的用法

 显示结果:

原数组:

Array
(
    [0] => 155::武侠::http://www.movie618.com/movie/618133551.html
    [1] => 1::电影618::http://www.movie618.com/
    [2] => 2::窃听风云2::http://www.movie618.com/movie/618141596.html
    [3] => 3::关云长::http://www.movie618.com/movie/618123753.html
)

排序后数组:
Array
(
    [0] => 155::武侠::http://www.movie618.com/movie/618133551.html
    [1] => 3::关云长::http://www.movie618.com/movie/618123753.html
    [2] => 2::窃听风云2::http://www.movie618.com/movie/618141596.html
    [3] => 1::电影618::http://www.movie618.com/
)

所以数组的第一个元素就是最大值。

二、巧用rsort()求数组最大值

<?php
$fruits = array("155::武侠::http://www.movie618.com/movie/618133551.html", "1::电影618::http://www.movie618.com/", "2::窃听风云2::http://www.movie618.com/movie/618141596.html", "3::关云长::http://www.movie618.com/movie/618123753.html");
print_r($fruits);
sort($fruits,SORT_NUMERIC);//升序排列,SORT_NUMERIC - 把值作为数字来处理,详见sort()的用法
print_r($fruits);
?>

查看 sort()的用法

显示结果:

原数组:

Array
(
    [0] => 155::武侠::http://www.movie618.com/movie/618133551.html
    [1] => 1::电影618::http://www.movie618.com/
    [2] => 2::窃听风云2::http://www.movie618.com/movie/618141596.html
    [3] => 3::关云长::http://www.movie618.com/movie/618123753.html
)

排序后数组:
Array
(
    [0] => 1::电影618::http://www.movie618.com/
    [1] => 2::窃听风云2::http://www.movie618.com/movie/618141596.html
    [2] => 3::关云长::http://www.movie618.com/movie/618123753.html
    [3] => 155::武侠::http://www.movie618.com/movie/618133551.html
)

所以数组的第一个元素就是最小值。

posted @ 2011-10-31 17:54  飞天神鼠  阅读(1397)  评论(0编辑  收藏  举报