What versions of PHP does Gravity Flow support?

Gravity Flow currently supports PHP from 5.6 up to version 7.4.

• PHP 5.6 is the minimum version which WordPress supports since WordPress 5.2.
• PHP 7.4 is the latest version that WordPress recommends.
• Full PHP 8.0 compatibility for Gravity Flow (or Gravity Forms) is not possible until WordPress progresses past the “beta-compatible” status. The same limitation applies for PHP 8.1, see Gravity Forms PHP 8.1 compatibility.
  Beyond that,there are no Gravity Flow specific issues with PHP 8.0 or 8.1 known at this time. Note that if you run a compatibility test and see failure messages about $HTTP_RAW_POST_DATA this is expected. The code is there for backwards compatible with earlier versions of PHP.