You would just have to modify the com_registration component to remove the check on [ and ]
Michel Staal wrote:
Does any of you know if it is possible to alter Joomla in a way that characters like [ and ] are allowed to use during registration?
I am hosting a Joomla clansite and members want to use their clantag at registration ( example: [CLAN]Flits ).
By default these characters are not allowed by Joomla. It is possible though to use these tags when members edit their profile after registration.
But I prever to have them registering with their clantags from the start.
Is that possible? What needs to be changed?