Applications

How to switch PHP version per application

~1 min read

Each application on your server can run a different PHP version. Switch between PHP 7.4 and PHP 8.3 per app without affecting anything else.

Steps

1
Open the application
Open your server, click "Applications", and click the application you want to change.
2
Go to Control or Settings
Click the "Control" tab (or "Settings") inside the application.
3
Change the PHP version
Find the "PHP Version" dropdown and select the version you want (e.g. switch from 8.1 to 8.3).
4
Save the change
Click "Save" or the update button. DeployFly creates a new PHP-FPM pool for this app and reloads Nginx automatically.
5
Verify the change
Create a temporary file at /var/www/yourdomain.com/public/phpinfo.php containing <?php phpinfo(); ?> and visit it. Delete the file after confirming the version.
```
<?php phpinfo();
```

Watch out

Some WordPress plugins are not fully compatible with PHP 8.x. Test thoroughly after switching.
Check your app's error log after switching PHP versions to catch any compatibility warnings.

Tips

Install the new PHP version first from the server's "Install" tab if it doesn't appear in the dropdown.
Test a PHP version switch on a staging app before applying it to production.