How to Check the PHP Version Joomla Is Using
When troubleshooting Joomla, check the PHP version that the Joomla web application is actually using. A hosting control panel or command-line php -v can report a different PHP installation or handler from the one serving the website.
When troubleshooting Joomla, verify the PHP version used by the web request that actually runs Joomla. A hosting panel, SSH command, cron job, or another virtual host can use a different PHP binary or configuration, so the version reported inside Joomla is the best starting point for website-specific diagnosis.
Check the PHP version in Joomla Administrator
- Sign in to Joomla Administrator.
- Open System → Information Panel → System Information.
- On the System Information tab, locate the PHP version.
- Record the complete version number before making any server changes.
This value comes from the PHP runtime handling the Administrator request, which makes it more relevant to Joomla than a version reported by an unrelated shell session.
Confirm the runtime with PHP Information
Open the PHP Information tab on the same screen. Confirm the PHP version and note the loaded configuration file, server API/handler, and other runtime details when they are relevant. If System Information and PHP Information agree, you have strong evidence about the PHP environment serving Joomla.
Explain differences between web and command-line PHP
It is normal for php -v over SSH to differ from Joomla when a server has multiple PHP versions. Apache modules, PHP-FPM pools, CGI/FastCGI handlers, control-panel selectors, CLI jobs, and scheduled tasks can each point to different binaries or INI files. When diagnosing a frontend or Administrator problem, follow the web runtime first; when diagnosing a cron or CLI command, verify that runtime separately.
Check compatibility before switching PHP
Before changing the domain's PHP version, verify the requirements for the installed Joomla release, template, and third-party extensions. Take a current backup. A PHP switch can also change loaded modules, memory limits, upload limits, disabled functions, and INI configuration, so a version change should be treated as an environment change rather than a single-number adjustment.
Verify the change from Joomla
- Change PHP using the hosting provider's supported method.
- Reload Joomla Administrator and return to System Information.
- Confirm the expected PHP version is now reported.
- Check PHP Information for required extensions and important limits.
- Test frontend pages, Administrator, forms, uploads, email, scheduled tasks, and critical extensions.
If Joomla still reports the old version, check the domain's PHP handler or PHP-FPM pool rather than repeatedly changing the CLI version.
Need More Help with Joomla?
Still having trouble? Open a support ticket with QuantaCade Support and we'll be happy to help where we can.
Support priority is given to QuantaCade products, services, and customers. However, we're also happy to assist fellow Joomla users with general Joomla questions and troubleshooting when possible.
QuantaCade is an independent Joomla extension developer and is not official Joomla support. Some issues involving third-party extensions, hosting environments, server configurations, or other systems outside our development control may be beyond what we're able to resolve.