Can JSONP and CORS be implemented in PHP to overcome the Origin Policy limitations when accessing elements from different domains?

When accessing elements from different domains, the Same Origin Policy restricts the browser from making requests to a different domain. JSONP (JSON with Padding) and CORS (Cross-Origin Resource Sharing) are two techniques that can be implemented to overcome this limitation. JSONP works by dynamically adding a script tag to the HTML document to fetch data from a different domain, while CORS involves setting appropriate headers on the server-side to allow cross-origin requests.

// JSONP implementation in PHP
$callback = $_GET['callback'];
$data = ['name' => 'John', 'age' => 30];
$json = json_encode($data);

header('Content-Type: application/javascript');
echo $callback . '(' . $json . ')';
```

```php
// CORS implementation in PHP
header('Access-Control-Allow-Origin: *');
header('Access-Control-Allow-Methods: GET, POST, PUT, DELETE');
header('Access-Control-Allow-Headers: Content-Type');