What are common troubleshooting steps for PHP scripts that do not respond or execute expected actions when specific links are clicked?

When PHP scripts do not respond or execute expected actions when specific links are clicked, it could be due to errors in the code, such as syntax errors, incorrect file paths, or missing dependencies. To troubleshoot this issue, check the error logs for any error messages, ensure that the links are correctly pointing to the PHP scripts, and verify that the necessary files and libraries are included.

<?php
// Check for any syntax errors or missing dependencies in the code
error_reporting(E_ALL);
ini_set('display_errors', 1);

// Verify that the links are correctly pointing to the PHP scripts
<a href="script.php">Click here</a>

// Ensure that the necessary files and libraries are included
require_once 'path/to/file.php';
?>