求高手，模拟浏览器抓取网页,该如何处理

<br /><br />function file_get($url){<br />	 ob_start();<br />	 $ch = curl_init();<br />	 <br />	 curl_setopt($ch, CURLOPT_COOKIEJAR, "./cookie.txt");<br />	 curl_setopt($ch, CURLOPT_USERAGENT, "Mozilla/4.0 (compatible; MSIE 7.0; Windows NT 5.1; .NET CLR 2.0.50727; InfoPath.1; CIBA)");<br />	curl_setopt($ch, CURLOPT_URL, $url);<br />	 curl_setopt($ch, CURLOPT_HEADER, FALSE);<br />	 curl_setopt($ch, CURLOPT_COOKIESESSION, TRUE);<br />	 curl_setopt($ch, CURLOPT_NOBODY, FALSE);<br /><br />	 curl_exec($ch);<br />	 curl_close($ch);<br />	 $content = ob_get_clean();<br />	 <br />	 <br /><br />	return $content;<br /><br />}<br />