如何使用php访问嵌套json中的特定数据？

$jsonData = '{
    "employees": [
        {
            "firstName": "John",
            "lastName": "Doe",
            "email": "john@example.com"
        },
        {
            "firstName": "Jane",
            "lastName": "Smith",
            "email": "jane@example.com"
        }
    ]
}';

// 解析JSON数据为关联数组
$data = json_decode($jsonData, true);

// 访问特定数据
$firstName = $data['employees'][0]['firstName'];
$lastName = $data['employees'][0]['lastName'];
$email = $data['employees'][0]['email'];

echo "First Name: " . $firstName . "<br>";
echo "Last Name: " . $lastName . "<br>";
echo "Email: " . $email . "<br>";

First Name: John
Last Name: Doe
Email: john@example.com