Validates a password_confirm element.
function password_confirm_validate($element, &$element_state) {
$pass1 = trim($element['pass1']['#value']);
$pass2 = trim($element['pass2']['#value']);
if (!empty($pass1) || !empty($pass2)) {
if (strcmp($pass1, $pass2)) {
form_error($element, t('The specified passwords do not match.'));
}
}
elseif ($element['#required'] && !empty($element_state['input'])) {
form_error($element, t('Password field is required.'));
}
// Password field must be converted from a two-element array into a single
// string regardless of validation results.
form_set_value($element['pass1'], NULL, $element_state);
form_set_value($element['pass2'], NULL, $element_state);
form_set_value($element, $pass1, $element_state);
return $element;
}