if ('true' == api_get_setting('login_is_email')) {
if ('true' == api_get_setting('login_is_email')) {
$form->addRule('email', sprintf(get_lang('The login needs to be maximum %s characters long'), (string) USERNAME_MAX_LENGTH), 'maxlength', USERNAME_MAX_LENGTH);
$form->addRule(
'email',
sprintf(get_lang('The login needs to be maximum %s characters long'), (string) USERNAME_MAX_LENGTH),
'maxlength',
USERNAME_MAX_LENGTH
);
$form->addRule('email', get_lang('This login is already in use'), 'username_available');
$form->addRule('email', get_lang('This login is already in use'), 'username_available');