if (@unknown_keys) {
_control_error($form, $file_name, sprintf($locale->text("Unknown control fields: #1", join(' ', sort({ lc $a cmp lc $b } @unknown_keys)))));
}
if (@unknown_keys) {
_control_error($form, $file_name, sprintf($locale->text("Unknown control fields: #1", join(' ', sort({ lc $a cmp lc $b } @unknown_keys)))));
}