The first step to using WHMCS is installing it on your server. WHMCS includes an easy browser installation tool to suit most users' needs.
If you want more configuration options than browser-based installation offers, you can install and upgrade WHMCS on the command line.
If you use a cPanel & WHM version that supports it, you can install WHMCS easily using deprecated cPanel's Site Software feature.
ionCube Loader® is a PHP extension that allows decoding and encoding of WHMCS files. Make sure your system uses the correct version.
You can use automated options like Sync Accounts or Importassist to migrate your data, or you can add data using manual entry.
To prevent problems, we recommend testing updates and customizations in a test environment before applying them to your production server.
If you need to uninstall WHMCS, you can do so manually by removing the related WHMCS files, data, cron jobs, and email piping or importing.