while ($idx < strlen($test)) {
$check = substr($test, $idx, 1);
if ((!in_array($check, $GLOBALS['valid_email_chars'])) && ($check != '@')) {
// Char found so end here again
break;
while ($idx < strlen($test)) {
$check = substr($test, $idx, 1);
if ((!in_array($check, $GLOBALS['valid_email_chars'])) && ($check != '@')) {
// Char found so end here again
break;