How can developers ensure that external PHP scripts, like "Guestcal 2.1.4," are integrated correctly into a website without causing conflicts?

To ensure that external PHP scripts like "Guestcal 2.1.4" are integrated correctly into a website without causing conflicts, developers should carefully review the documentation provided by the script's author. They should also check for any naming conflicts with existing variables or functions in their code. Additionally, developers should test the integration thoroughly in a development environment before deploying it to the live website.

// Example of integrating "Guestcal 2.1.4" script into a website without conflicts

// Include the external script file
require_once 'guestcal-2.1.4.php';

// Initialize the Guestcal object
$guestcal = new Guestcal();

// Use the Guestcal methods as needed
$guestcal->displayCalendar();