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Homephp教程php手册PHP中数组的分组排序实例

这篇文章主要介绍了PHP中数组的分组排序实例,对PHP数组分组排序的方法,需要的朋友可以参考下

PHP的数组,数组中的内容大致如下:

复制代码 代码如下:


$list = array(
    array(2,3,5),
    array(2,5,24),
    array(3,8,6),
    array(3,2,10),
    array(4,7,20),
    array(4,1,15),
    array(6,4,10),
    array(7,9,20),
    );


为了方便表达,我把3列数字分别称为,ABC三列

需求:默认以A列排序为主,如果A列相同则以C列倒序排列相同的元素。B列其实没有参与排序,,但是在实际运用中有用,所以我也写出来了。

方法一:

复制代码 代码如下:


$a = $c = array();
foreach($list as $val){
    $a[] = $val[0]; //a列
    $c[] = $val[2]; //c列
}
//安装a列升序,然后安装b列降序 , 类似sql,orderby a asc,b desc
array_multisort($a,SORT_ASC , $c, SORT_DESC, $list);
print_r($list);


方法二:

复制代码 代码如下:


for($j=0;$j    for($i=count($list)-1;$i>$j;$i--){
        if($list[$i][0] == $list[$i-1][0] && $list[$i][2] > $list[$i-1][2])
            list($list[$i],$list[$i-1]) = array($list[$i-1],$list[$i]);
    }
}

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