Troubleshoot and resolve PHP Fatal error: Maximum execution time of 300 seconds exceeded in /path/to/file.php errors in WHMCS. You can view information about your PHP configuration from within the Admin Area. To meet WHMCS's PHP version requirements, you may need to periodically update PHP to a new supported version. You can check your system's compatibility with PHP from within the Admin Area. We plan to permanently remove support for legacy Smarty tags in WHMCS 9.0. You must remove these tags from your customizations. Troubleshoot and resolve Required function is not available errors. Troubleshoot and resolve Segmentation fault errors. File sessions and database sessions can help you preserve data across subsequent page loads within your custom web applications. Troubleshoot and resolve issues with sessions not being removed. Smarty Security Policies are security hardening measures that protect a system. WHMCS applies a Smarty Security Policy for system-wide use and a mail policy for stored and dynamic email-based templates. How to troubleshoot and resolve display issues in Server Status Monitoring. Troubleshoot and resolve An Error Occurred. Please try again. errors. Troubleshoot and resolve issues that cause the WHMCS installation process to stop on Step 4. Use System Health to view your system environment status and quickly find and address issues. Troubleshoot and resolve timezone-related automation issues, like incorrect timestamps or cron frequency warnings. Troubleshoot and resolve Call to undefined function PHPMailer
HPMailerscapeshellarg() errors. Troubleshoot and resolve Whoops Exception Maximum execution time of 30 seconds exceeded errors. You can use cPanel's MultiPHP Manager and MultiPHP INI Editor features to upgrade PHP.