I have an email login screen that sends the username and password to
an authentication screen. I designate the username with the name of
the input, i.e. <input type="text" name="username"> with 'user'
entered sends $username=user to the php authentication page. The
problem is, to log in, users have to enter 'user+domain.com' in the
user name (ISP requirement). Is there a php script I can add to the
login page so that a user can just type their user name and the code
will automatically add '+domain.com' to the end of it and send it as
$username=user+domain.com?