Opcode caching can be enabled on a per-website basis. This setting is disabled by default.
To enable Opcode caching on a website:
- On the website dashboard select Advanced then Optimisation
- Scroll to Caching
- Toggle Opcode caching On
This tool will cache the compiled operation code (opcodes) of PHP scripts to serve your website content faster.
Do not use Opcode caching on WHMCS installs as there are know issues.