What potential reasons could cause the PHP script to stop functioning as expected?

There are several potential reasons that could cause a PHP script to stop functioning as expected, such as syntax errors, missing required extensions, incorrect file permissions, or server configuration issues. To solve this problem, you should first check for any error messages or warnings in the PHP error log or enable error reporting in your script. You can also try running the script in a different environment or using a debugging tool to pinpoint the issue.

<?php
// Enable error reporting
error_reporting(E_ALL);
ini_set('display_errors', 1);

// Your PHP script code goes here
?>