Blog post that explains how to display custom data from another datatable table (mysqli) and display the data in piwik as a widget and a new menu entry:
Piwik custom data tracking
Thanks for this useful blog post! 
Blog post that explains how to display custom data from another datatable table (mysqli) and display the data in piwik as a widget and a new menu entry:
Piwik custom data tracking
Thanks for this useful blog post!