How can one effectively troubleshoot PHP code that suddenly stops working?

To effectively troubleshoot PHP code that suddenly stops working, start by checking for any recent changes or updates that may have caused the issue. Review the error logs to identify any specific errors or warnings that can point you towards the problem. Use debugging tools like var_dump() or print_r() to inspect variables and data flow in your code. Additionally, consider breaking down the code into smaller parts and testing each component individually to isolate the issue.

// Example code snippet demonstrating how to use var_dump() for debugging
$variable = 10;
var_dump($variable);