PHP 7.4 has not been officially supported since 2022. If your site is still on it — it's time to update. Let's look at what it gives and what to watch out for.
Performance
PHP 8.3 processes requests noticeably faster than 7.4 and uses memory more efficiently. For high-load sites this is a direct saving of resources.
Security
Old versions don't get patches. That's an open door for known vulnerabilities.
Compatibility
- First test the update on a staging copy.
- Update plugins and the theme to current versions.
- Check the error log after switching.
On WPHost the PHP version can be switched in the panel in one click, and staging lets you check everything without risk to production.