使用多个键对数组进行排序

Question

所有,

我有数组格式的以下数组.显示JSON格式只是为了方便用户使用.如何在php中使用键"name"对数组进行升序排序？

            "food":
            [
                {
                    "id": 1,
                    "name": "dessert"
                },
                {
                    "id": 2,
                    "name": "maincourse"
                },
                {
                    "id": 3,
                    "name": "entrees"
                },
                {
                    "id": 4,
                    "name": "appetizers"
                }
            ]

所需的结果是这样的数组:

            "food":
            [
                {
                    "id": 4,
                    "name": "appetizers"
                },
                {
                    "id": 1,
                    "name": "dessert"
                },
                {
                    "id": 3,
                    "name": "entrees"
                },
                {
                    "id": 2,
                    "name": "maincourse"
                }
            ]

Answer 1

用途usort():

$array = array('food' => array(
        array(
            "id"=> 1,
            "name"=> "dessert"
        ),
        array(
            "id"=> 2,
            "name"=> "maincourse"
        ),
        array(
            "id"=> 3,
            "name"=> "entrees"
        ),
        array(
            "id"=> 4,
            "name"=> "appetizers"
        )
    )
);

function compare($a, $b) {
    return strcmp($a['name'], $b['name']);
}

usort($array['food'], 'compare');
print_r($array);