留言板封禁ip的代码片段

$wanna = $_GET['wanna'];
if($wanna=="forbidip")
{
	$lyid=(int)$_GET['lyid'];
	$bid=(int)$_GET['bid'];
	$ip = $empire->fetch1("select ip from {$dbtbpre}enewsgbook where lyid = $lyid");
	$closed = $empire->fetch1("select closedoip from {$dbtbpre}enewspublic order by id desc limit 1");
	
	$delimiter = "rn";
    $new_ip = $ip['ip'];
    
    if (strpos($closed['closedoip'], $new_ip) === false) {
        $updated_ips = $closed['closedoip'] . $delimiter . $new_ip;
        $close = $empire->query("UPDATE {$dbtbpre}enewspublic SET closedoip='$updated_ips' WHERE id=1");
        printerror2("IP已成功封禁","window.reload()");
    } else {
        $updated_ips = $closed['closedoip'];
        printerror2("被封禁ip已存在","window.reload()");
    }
}