What tools and techniques can be used to troubleshoot issues with linking between local and live PHP sites?

When troubleshooting issues with linking between local and live PHP sites, one common technique is to check the file paths and URLs being used in the code. Ensure that the paths are correct and that there are no typos or errors in the links. Additionally, using tools like browser developer tools or PHP error logs can help identify any specific errors that may be causing the linking issue.

// Example code snippet to check and correct file paths when linking between local and live PHP sites
$base_url = 'http://www.example.com/';
$link = $base_url . 'page.php';

echo '<a href="' . $link . '">Link</a>';