对php数组进行分组的最好方法是什么？

<?php
$students = [
    ['name' => 'Alice', 'age' => 20, 'gender' => 'female'],
    ['name' => 'Bob', 'age' => 22, 'gender' => 'male'],
    ['name' => 'Charlie', 'age' => 21, 'gender' => 'male'],
    ['name' => 'David', 'age' => 20, 'gender' => 'male'],
    ['name' => 'Eve', 'age' => 22, 'gender' => 'female'],
];

// 使用array_reduce函数对数组进行分组
$grouped = array_reduce($students, function ($result, $student) {
    $age = $student['age'];
    if (!isset($result[$age])) {
        $result[$age] = [];
    }
    $result[$age][] = $student;
    return $result;
}, []);

// 打印分组结果
foreach ($grouped as $age => $students) {
    echo "Age $age:\n";
    foreach ($students as $student) {
        echo "- {$student['name']}\n";
    }
    echo "\n";
}
?>