Example PHP Page
In this example, we use PHP to process form data submitted by the user. We retrieve the submitted values using the `$_POST` superglobal and store them in variables, then use these values to perform some action (such as sending an email). We also use the `htmlspecialchars` function to sanitize the user input and prevent against cross-site scripting attacks. Package library: The examples above use built-in PHP functions and do not require any external libraries or packages. However, there are many third-party libraries available for PHP that can provide additional functionality, such as working with specific databases or implementing complex algorithms. Some popular PHP package libraries include Laravel, Symfony, and CodeIgniter.