function checkEmail() { $email = urldecode(JRequest::getString('email', NULL, 'method')); // validate email format if (!UserHelper::isEmailAddressWellformed($email)) { echo JText::_("SYSTEM_EMAIL_INVALID_FORMAT"); return; } // verify that email is not used if (UserHelper::emailExists($email)) { echo JText::_("SYSTEM_EMAIL_ALREADY_USED"); return; } }