Supported PHP Versions
Sympl uses the relevant version of PHP for your version of Debian, along with the typical PHP extensions, see Website Configuration Reference for details.
- PHP 7.3 for Debian Buster (Sympl 10)
- PHP 7.4 for Debian Bullseye (Sympl 11)
- Configurable versions per site for Debian Bookworm (Sympl 12)
Since Debian and PHP each run different release schedules, Sympl often doesn't include the latest version of PHP. Debian handle providing backported security patches for their packaged versions of PHP [1] so using old versions of PHP isn't a cause for concern providing you use a supported version of Debian.
PHP versions selected per-site
It's strongly suggested that if you need an alternate version of PHP and you're running Sympl 10 or 11, you upgrade to Sympl 12 or newer.
If you're running Sympl 12 or newer, please see Website_Configuration_Reference#PHP Configuration for information on how to set a specific PHP version for a site.