DO NOT UPGRADE TO 3.0.0 if you use [php_everywhere] shortcode

Shame it broke your site, however I suggest you either DO upgrade to the latest version OR use an alternative plugin. Staying on an outdated version of this plugin leaves your installation vulnerable to remote code execution. See the changelog of this plugin or the in detail post on WordFence (I’m not allowed to place links here). In the support section a fellow user wrote a guide how to move away from this plugin.

Best advice is NOT to run an outdated version.

• This reply was modified 2 years, 9 months ago by Bianca.

Agreed. Wordfence made a few vulnerabilities public this morning.
https://www.wordfence.com/blog/2022/02/critical-vulnerabilities-in-php-everywhere-allow-remote-code-execution/
Going back pre 3.0 isn’t a good option.

Did this and lost all the code added by a previous developer, how did you downgrage? I’d rather not do a full rollback of the site, I just need access to the PHP code that was lost in the upgrade.

In that case maybe it’s possible to (temporarily) rollback to a previous version of the plugin. On the plugin page in the right column there is a link that says “advanced view”. After clicking that a different version of the plugin page appears. Scroll to the bottom of the page and you are able to select a version to download.

If you want to do this from your wp dashboard, you can download a plugin called “WP Rollback” (search for it). It lets you install other versions from themes and plugin from within your dashboard.

Always backup first.

That worked, thank you!