preg match hakkında yardım

<?
$site = "http://www.site.com";
$baglan=file_get_contents($site);

    $veri='#<td class="td_back_select">(.*?)</td>#si';
    preg_match($veri,$baglan,$d_veri);
    $cekilen=$d_veri[1];
    
	echo $cekilen;
?>

<?
$site = "http://www.site.com";
$baglan=file_get_contents($site);

    $veri='#<td class=\"td_back_select\">(.*?)</td>#si';
    preg_match($veri,$baglan,$d_veri);
    $cekilen=$d_veri[1];
    
	echo $cekilen;
?>

   <? 
$site = "http://www.site.com"; 
$baglan=file_get_contents($site); 

    $veri='#<td width="165" class=\'td_back_select\' >(.*?)</td>#si'; 
    preg_match($veri,$baglan,$d_veri); 
    $cekilen=$d_veri[1]; 
     
    echo $cekilen; 
?>

<?  
$site = "http://havadurumu.ok.net/sehirler/35/";  
$baglan=file_get_contents($site);  

    $veri='#<TD colspan="3" class="borderstyle" align="center">(.*?)><img border="0" Src="http://havadurumu.ok.net/images/back.gif">#si';  
    preg_match($veri,$baglan,$d_veri);  
    $cekilen=$d_veri[1];  
      
    echo $cekilen."</A></TD></TR></TABLE>";  
?>