What are some best practices for integrating scripts in PHP?

When integrating scripts in PHP, it is important to ensure that the scripts are properly included and executed without causing conflicts or errors. One best practice is to use the require_once() function to include scripts, as it will only include the file once to prevent duplication. Additionally, organizing scripts into separate files based on functionality can help improve code readability and maintainability.

// Include a script using require_once()
require_once('script.php');