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PHP:二维数组根据某个字段排序

zhoulujun 2022-02-15 阅读 138
 /**
     * 二维数组根据某个字段排序
     */
    public function sortArr()
    {
        $user_list = [
            ['name' => '张三', 'age' => 28],
            ['name' => '赵六', 'age' => 21],
            ['name' => '王五', 'age' => 20],
            ['name' => '李四', 'age' => 21]
        ];
        //按字段age排序
        array_multisort(array_column($user_list, 'age'),SORT_ASC,$user_list);
        echo "<pre>";
        var_dump($user_list);

        $user_list = [
            ['name' => 'candy', 'age' => 28],
            ['name' => 'ac', 'age' => 21],
            ['name' => 'Bd', 'age' => 18],
            ['name' => 'abby', 'age' => 20],
            ['name' => 'fly', 'age' => 21],
            ['name' => 'Ay', 'age' => 26]
        ];
        //SORT_STRING 按照字符串比较。但是不区分大小写字母排序。所以这里可以先转换为小写
        $user_list_name = array_map("strtolower",array_column($user_list, 'name'));
        array_multisort($user_list_name,SORT_ASC,SORT_STRING,$user_list);
        var_dump($user_list);
    }

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