php 二维数组排序

主要通过 array_multisort 函数来进行排序

<?php
//原数组
$arr = [
    ["name"=>"小明","age"=>18],
    ["name"=>"小红","age"=>7],
    ["name"=>"小刚","age"=>52],
    ["name"=>"小亮","age"=>33],
];
//将元素组的需排序的字段获取出来
$column = array_column($arr,"age");

//进行排序
array_multisort($column,SORT_DESC,$arr);
var_dump($arr);

结果如下

array(4) { [0]=> array(2) { ["name"]=> string(6) "小刚" ["age"]=> int(52) } [1]=> array(2) { ["name"]=> string(6) "小亮" ["age"]=> int(33) } [2]=> array(2) { ["name"]=> string(6) "小明" ["age"]=> int(18) } [3]=> array(2) { ["name"]=> string(6) "小红" ["age"]=> int(7) } }