function getUserName($userID) { // connect to the database $conn = mysqli_connect("localhost", "username", "password", "database_name"); // query the database to retrieve the user's real name $result = mysqli_query($conn, "SELECT real_name FROM users WHERE id = '$userID'"); // return the user's real name $row = mysqli_fetch_assoc($result); return $row['real_name']; }
function getUserName($userID) { // set up API URL and parameters $url = 'https://api.example.com/users/' . $userID; $params = array('auth_token' => '123456'); // send a GET request to the API and parse the JSON response $response = json_decode(file_get_contents($url . '?' . http_build_query($params)), true); // return the user's real name return $response['real_name']; }In this example, we use getRealName() function to retrieve user name from an external API. We send a GET request to the API using file_get_contents() function with an auth token parameter and parse the JSON response using json_decode() function. We then return the user's real name from the response. Possible package libraries that include getRealName() function are PHP core, Laravel, Symfony, CodeIgniter, or Yii.