email address from nis authentication

[vamsi_j]

how should i fetch the email address from NIS authentication.
function getUserByName($user)
{

  $fullname = yp_match (yp_get_default_domain(), "passwd.byname", $user);
  if ( ! empty ( $fullname ) ) {
      $fullname = explode ( ":", $fullname );
        return $fullname[4];
      } else {
        return $user;
    }
}


I have an unix command ypcat -k aliases | grep  $Username
which prints the username and email address.I dont know how to embed it in PHP..
is there anyway to fetch the email like the username which i have done above.Please help.,.

[trq]

[quote]I dont know how to embed it in PHP[/quote]

Maybe [url=http://php.net/shell_exec]shell_exec[/url] will help.

[vamsi_j]

or else is there any function to get the email address apart from the way which i have mentioned.