如何在Laravel 5.4中对Json输出进行分组？

use Illuminate\Support\Collection;

// 假设你有一个包含用户数据的集合
$users = collect([
    ['name' => 'John', 'age' => 25, 'gender' => 'male'],
    ['name' => 'Jane', 'age' => 30, 'gender' => 'female'],
    ['name' => 'Bob', 'age' => 35, 'gender' => 'male'],
    ['name' => 'Alice', 'age' => 28, 'gender' => 'female'],
]);

// 使用groupBy方法按照性别进行分组
$groupedUsers = $users->groupBy('gender');

// 将分组后的结果转换为Json输出
$jsonOutput = $groupedUsers->toJson();

// 输出Json结果
echo $jsonOutput;

{
    "male": [
        {"name": "John", "age": 25, "gender": "male"},
        {"name": "Bob", "age": 35, "gender": "male"}
    ],
    "female": [
        {"name": "Jane", "age": 30, "gender": "female"},
        {"name": "Alice", "age": 28, "gender": "female"}
    ]
}