What are the potential reasons for a PHP script running on XAMPP but not on a web server?

The potential reasons for a PHP script running on XAMPP but not on a web server could be due to differences in server configurations, PHP versions, or missing extensions on the web server. To solve this issue, ensure that the PHP script is compatible with the version of PHP running on the web server, check for any missing extensions required by the script, and adjust the code accordingly to work in the new environment.

// Example code snippet to check PHP version compatibility
if (version_compare(PHP_VERSION, '7.0.0') < 0) {
    die('PHP version 7.0.0 or higher is required');
}

// Example code snippet to check for missing extensions
if (!extension_loaded('mysqli')) {
    die('The mysqli extension is required');
}