PHP 간단한... ip 접근 금지 체크

<?if (preg_match("/$REMOTE_ADDR/i","210.218.166.227,211.243.109.185,211.243.109.213, 127.0.0.1")) {?>

<frameset rows='0,*' frameborder=0 framespacing=0 border=0>
<frame name=empty src="empty.php" NORESIZE scrolling='no' frameborder=0>
<frame name=main src="php/admin.php" NORESIZE frameborder=0>
</frameset>

<?} else {?>
<meta http-equiv='Refresh' content='0;URL=http://daum.net'>
<?}?>