$message
"; ?>
"John Smith", "age" => 35, "email" => "john@example.com" ); header('Content-Type: application/json'); echo json_encode($data); ?>In this example, the PHP code generates a JSON response that contains an array of data about a fictional user named John Smith. This code specifically sets the Content-Type HTTP header to indicate that the response is in JSON format. To generate these types of responses, PHP developers may use packages and libraries such as Slim, Laravel, or Symfony. These frameworks provide built-in functions and templates for generating various types of responses, as well as other useful features for building web applications.