About PHP to collect a page a certain number of questions, please help to write a master

About PHP to collect a page a number of questions, please help to write a master
I now want to make a Web site, need to remotely get a Web site query results, I wrote the regular some problems, always can't get the results of the desired query number. Please help the experts to solve the following:
Http://mytool.chinaz.com/baidusort.aspx?host=www.baidu.com
Above this is to query a domain name Baidu weight page, I just need to get the query structure in the "Baidu Weight of 9" This weight number,
My code is written like this:
function Baidu ($s) {
$baidu = "http://mytool.chinaz.com/baidusort.aspx?host=". $s;
$site =file_get_contents ($baidu);
Echo $site;
Preg_match (' How to write here ', $site, $count);
return $count [0];
}
$num 1=baidu ("http://www.baidu.com");
Echo ' website Baidu weights for '. $num 1;
?>
Ask a master is how to write, how to get that query Baidu weight value, thank you

------Solution--------------------
$str = file_get_contents (' data.txt ');
$nmatches = Preg_match ('/.* (. *) <\/font>/uis ', $str, $matches);
if ($nmatches) {
echo $matches [1][0]. Php_eol;
}
?>

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