Are there any best practices for merging PHP code snippets to ensure the functionality of the original online.php file is maintained?

When merging PHP code snippets, it is important to carefully review and test the changes to ensure that the functionality of the original online.php file is maintained. One best practice is to use version control systems like Git to track changes and easily revert back if needed. Additionally, documenting the changes made and testing thoroughly before deploying the merged code can help prevent any unexpected issues.

// Example of merging two PHP code snippets while ensuring functionality is maintained

// Original online.php file
include 'file1.php';
include 'file2.php';

// Merged code snippet
// Make sure to review and test the changes before deploying
include 'file1.php';
include 'file3.php'; // New functionality from the second code snippet