Plugin stops working after upgrading PHP version on the server.
Plugin Crashes After PHP Update
Key Points: Server update to PHP 8.1+ causes plugin to throw fatal errors or stop functioning.
You upgrade to a newer PHP version — and a plugin immediately fails. Missing parameters, deprecation warnings, or full-on crashes. Not all plugins are ready for modern PHP.
⚠️ Symptoms
- Fatal error logs referencing undefined variables or functions
- Blank pages or broken plugin functionality
- Warnings about deprecated PHP features
🛠️ Steps to Resolve
- Downgrade PHP temporarily to regain access
- Check for plugin updates or patches that fix compatibility
- Replace old plugins that haven’t been maintained
💡 Advice
Test PHP version upgrades in staging first — and keep a list of plugins that pass compatibility checks.