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Homephp教程PHP源码PHP数组分组排序程序代码

php中数据排序可以用sort但如果要做到数组分组排序的话我们可以使用array_multisort函数或者使用多重复遍历来做,下面看一个例子。

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PHP的数组,数组中的内容大致如下:

 代码如下 复制代码

$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:

 代码如下 复制代码

$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:

 代码如下 复制代码

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]);
    }
}

例子2

例如有下面的数据,从数据库里查出来的,是一个二维数组。
[0] => Array ( [trans_lang_id] => 1 [country_id] => 1 [trans_origin_id] => 1 [page_id] => 1 [trans_content] => test1
[1] => Array ( [trans_lang_id] => 2 [country_id] => 1 [trans_origin_id] => 2 [page_id] => 1 [trans_content] => test2
[2] => Array ( [trans_lang_id] => 3 [country_id] => 1 [trans_origin_id] => 3 [page_id] => 1 [trans_content] => test3
[3] => Array ( [trans_lang_id] => 4 [country_id] => 1 [trans_origin_id] => 4 [page_id] => 1 [trans_content] => test4
[4] => Array ( [trans_lang_id] => 6 [country_id] => 2 [trans_origin_id] => 1 [page_id] => 2 [trans_content] => test5

怎样按照country_id 和page_id分组,将里面的数据查分成多个数组?
也就是country_id和page_id相同的数据成为一个新数组。因为这样的数据会输出到同一个csv文件。
比如文件名为 zh_CN_1.csv。

 代码如下 复制代码

Array Translates:
US_en:Array (
        [1] => Array (
                    [0] => Array ( [0] => test [1] => 测试)
                    [1] => Array ( [0] => test [1] => 测试)
                    [2] => Array ( [0] => test [1] => 测试)
                    [3] => Array ( [0] => test [1] => 测试 )
                    )
            )

CN_zh:Array (
        [2] => Array (
                    [0] => Array ( [0] => There are no user contributed notes for this page. [1] => this belong to another country )
                        )
            )

        foreach ($translates as $translate) {
            $data[$translate["language_code"] . "_" . $translate['short_name'] ][$translate['page_id']][] = array($translate['content'], $translate['trans_content']);
        }
        foreach ($data as $locale_key => $item) {
            foreach ($item as $page_key => $csvContent) {
                $fileName = $locale_key . "_" . $page_key . ".csv";
                $translationFile->generateCSV($fileName, $csvContent);
            }

这样的话输出的CSV就像下面的结构:
zh_CN_1.csv
zh_CN_2.csv
en_US_1.csv
en_US_2.csv

每个csv里面可能有多条数据,就是那些国家语言以及page_id都相同的数据就放在同一个csv里

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