Advanced

The following are some advanced customisation options.

• Upgrading to WHMCS 8.0
  Everything you need to know to ensure a smooth transition to Version 8.
• Creating Pages
  Learn how to create additional pages within the WHMCS client area.
• Authentication via CurrentUser
  Learn how to assess the current authentication state with CurrentUser.
• Interacting with the Database
  Learn how to interact with the WHMCS database
• Date Functions
  Learn how to use the date helper functions in WHMCS
• Currency Formatting
  Learn how to use the currency formatting helper functions in WHMCS
• Logging
  Learn how to use the logging helper functions in WHMCS
• Widgets
  Learn how to create widgets using AbstractWidget
• JSON File
  Provide meta information for modules
• OAuth
  Learn how to set up OAuth with WHMCS.