bide böyle bir dene bakalım
for($i = 0; $i < count($atclist); $i++) 
{ 
	$atcLogin=$atclist[$i][37]; 
	$atcID=$atclist[$i][1]; 
	$atcName=$atclist[$i][2]; 
	if (substr($atclist[$i][0],-4,4) == "ATIS" || substr($atclist[$i][0],-3,3) == "OBS") continue; 
	 
	$tabloAdi="".date('Y').strtolower(date('F')); 
	$tabloYap="CREATE TABLE IF NOT EXISTS $tabloAdi (`onlineid` int(11) NOT NULL AUTO_INCREMENT,`onlinevatsimid` int(11) NOT NULL,`onlinename` varchar(50) NOT NULL,`onlinetime` int(11) NOT NULL,`onlinelogin` varchar(14) NOT NULL,PRIMARY KEY (`onlineid`)) ENGINE=MyISAM DEFAULT CHARSET=utf8 AUTO_INCREMENT=1"; 
	if (date('j')=="1") mysql_query($tabloYap); 
	$tabloYaz="insert into $tabloAdi (onlinevatsimid,onlinename,onlinetime,onlinelogin) values ('$atcID','$atcName','$atcOnline','$atcLogin')"; 
	$tabloDuzenle="update $tabloAdi set onlinetime='$atcOnline' where onlinevatsimid='$atcID' and onlinelogin='$atcLogin'"; 
	 
	$kontrol=mysql_num_rows(mysql_query("SELECT * FROM $tabloAdi  where onlinevatsimid='$atcID' and onlinelogin='$atcLogin'")); 

			if ($kontrol>0){
				mysql_query($tabloDuzenle); 	
			}
			else{
				mysql_query($tabloYaz); 
			}