排序多维数组的帮助 [英] Sort multi-dimensional array help

问题描述

我试图解决这阵由 season_number ，但是我真的不知道该充当我想我需要自定义排序使用？任何想法？

 阵列
（
    [0] =＆GT;排列
        （
            [season_number] =＆GT; 7
            [show_id] =＆GT; 21
            [show_seasons_id] =＆GT; 14
        ）    [1] =＆GT;排列
        （
            [season_number] =＆GT; 6
            [show_id] =＆GT; 21
            [show_seasons_id] =＆GT; 31
        ）    [2] =＆GT;排列
        （
            [season_number] =＆GT; 1
            [show_id] =＆GT; 21
            [show_seasons_id] =＆GT; 40
        ）    [3] =＆GT;排列
        （
            [season_number] =＆GT; 2
            [show_id] =＆GT; 21
            [show_seasons_id] =＆GT; 41
        ）
）
 

解决方案

您可以使用的 usort 用比较函数功能：

 函数compare_my_elements（$ ARR1，$ ARR2）{
   $ S1 = $ ARR1 [season_number];
   $ S2 = $ ARR2 [season_number];
   如果（$ S1 == $ S2）返回0;
   返回（$ S1＆GT; $ S2？1：-1）;
}usort（$ my_md_array，compare_my_elements）;
 

I am trying to sort this array by season_number however I am not really sure which function to use as I assume I need a custom sort? Any ideas?

Array
(
    [0] => Array
        (
            [season_number] => 7
            [show_id] => 21
            [show_seasons_id] => 14
        )

    [1] => Array
        (
            [season_number] => 6
            [show_id] => 21
            [show_seasons_id] => 31
        )

    [2] => Array
        (
            [season_number] => 1
            [show_id] => 21
            [show_seasons_id] => 40
        )

    [3] => Array
        (
            [season_number] => 2
            [show_id] => 21
            [show_seasons_id] => 41
        )
)

解决方案

You can use the usort function with the 'compare' function:

function compare_my_elements( $arr1, $arr2 ) {
   $s1=$arr1["season_number"];
   $s2=$arr2["season_number"];
   if( $s1 == $s2 ) return 0;
   return ( $s1 > $s2 ? 1 : -1 );
}

usort( $my_md_array, compare_my_elements );

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