How can PHP beginners ensure smooth integration of external scripts without compromising the functionality of their website?

To ensure smooth integration of external scripts without compromising the functionality of their website, PHP beginners should carefully review the documentation of the external script to understand its requirements and potential conflicts with existing code. Additionally, they should test the integration in a development environment before deploying it to the live website. Finally, beginners can use namespaces and proper error handling techniques to isolate the external script and prevent it from interfering with other parts of the website.

// Example code snippet demonstrating the use of namespaces to integrate an external script

namespace MyNamespace;

// Include the external script within the namespace
require_once 'external_script.php';

// Use the external script without conflicting with other code
$externalObject = new ExternalClass();
$externalObject->doSomething();