PHP array_column重新构建二维数组

$list = [
            [
                'id' => 1,
                'name' => '刘德华',
                'old' => 57,
                'sex' => '男'
            ],
            [
                'id' => 2,
                'name' => '梁朝伟',
                'old' => 55,
                'sex' => '男'
            ],
            [
                'id' => 3,
                'name' => '刘嘉玲',
                'old' => 59,
                'sex' => '女'
            ],
            [
                'id' => 4,
                'name' => '俞飞鸿',
                'old' => 59,
                'sex' => '女'
            ]
        ];
        $f_list = array_column($list, 'name', 'old');//参数：数组 新数组展示字段(仅支持1个字段) 新数组的key
        print_r($f_list);die;

        //输出结果
        [
            57 => '刘德华',
            55 => '梁朝伟',
            59 => '俞飞鸿',
        ];

//array_column第二个字段传null时，显示所有字段
        $list = [
            [
                'id' => 1,
                'name' => '刘德华',
                'old' => 57,
                'sex' => '男'
            ],
            [
                'id' => 2,
                'name' => '梁朝伟',
                'old' => 55,
                'sex' => '男'
            ],
            [
                'id' => 3,
                'name' => '刘嘉玲',
                'old' => 59,
                'sex' => '女'
            ],
            [
                'id' => 4,
                'name' => '俞飞鸿',
                'old' => 59,
                'sex' => '女'
            ]
        ];
        $f_list = array_column($list, null, 'old');//参数：数组 新数组展示字段(仅支持1个字段) 新数组的key
        print_r($f_list);die;

        //输出结果
        [
            57 => [
                'id' => 1,
                'name' => '刘德华',
                'old' => 57,
                'sex' => '男'
            ],
            55 => [
                'id' => 2,
                'name' => '梁朝伟',
                'old' => 55,
                'sex' => '男'
            ],
            59 => [
                'id' => 4,
                'name' => '俞飞鸿',
                'old' => 59,
                'sex' => '女'
            ]
        ];