We have a bunch of invitation codes that have the slash character in them. However, after an update of PieRegister special characters are no longer allowed in the invitation codes. Creating new invitation codes to replace these existing ones will cause a bunch of confusion. Is there a way to temporarily make the slash character allowed for the existing invitation codes? Any suggestion to point me in the right direction would be appreciated.
PR doest not allow any special charachter in invitation codes except dashes and underscores. If you want to customize the plugin you can find preg_match code in pie-register.php. Find InsertCode() in that file and change the preg_match as per your requirement.