采集网站内容，停止在多少行！怎么操作

采集网站内容，停止在多少行！如何操作！

<br />
<br />
function get_content_by_socket($url){ <br />
$url = eregi_replace('^http://', '', $url);<br />
$temp = explode('/', $url);<br />
$host = array_shift($temp);<br />
$url = ''.implode('/', $temp);<br />
$temp = explode(':', $host);<br />
$host = $temp[0];<br />
$port = isset($temp[1]) ? $temp[1] : 80;<br />
//echo $url;<br />
//echo $host;<br />
   $fp = fsockopen($host, 80) or die("Open ". $url ." failed"); <br />
    $header = "GET /".$url ." HTTP/1.1\r\n"; <br />
    $header .= "Accept: */*\r\n"; <br />
    $header .= "Accept-Language: zh-cn\r\n"; <br />
   $header .= "Accept-Encoding: gzip, deflate\r\n"; <br />
   $header .= "If-Modified-Since: Tue, 06 Apr 2010 07:56:03 GMT; length=2235\r\n"; <br />
    $header .= "User-Agent: Mozilla/4.0 (compatible; MSIE 6.0; Windows NT 5.1; SV1; GTB6.4)\r\n"; <br />
    $header .= "Host: ". $host ."\r\n"; <br />
	$header .= "Referer: http://video.baidu.com/v?word=11&ct=301989888&rn=20&pn=0&db=0&s=0&fbl=800\r\n"; <br />
	//fputs($content, "Referer: $domainrn");//伪造部分 <br />
    $header .= "Connection: Keep-Alive\r\n"; <br />
    $header .= "Cookie: BAIDUID=5F96971273579588527A980F307E8B7A:FG=1\r\n\r\n"; <br />
    //$header .= "Connection: Close\r\n\r\n"; <br />
<br />
    fwrite($fp, $header); <br />
    while (!feof($fp)) { <br />
        $contents .= fgets($fp, 8192); <br />
    } <br />
    fclose($fp); <br />
    return $contents; <br />
} <br />

以这个函数与为例

只要读取到第10行，下面的就不取了直接结束输出内容！这样取到了自己想要的，节省时间资源！
或者只读取到

 自定义哪个字段
可实现吗

分享到：
------解决方案--------------------
$i = 0;
while(!eof($f) and $i  xxxx;
 $i++;
}