经过URL抓取网页的TITLE，有些网站抓不到，方法愚笨，求指点

public function set_title()

	{

		// 获取进来URL

		$url = $_POST['url'];

		// $url = "www.pcauto.com.cn"; 抓不到！

		//一连串的curl设置		

		$ch = curl_init();

		curl_setopt($ch,CURLOPT_URL,$url);

		curl_setopt($ch,CURLOPT_HEADER,0);

		curl_setopt($ch,CURLOPT_ENCODING,'gzip');

		curl_setopt($ch,CURLOPT_RETURNTRANSFER,1);

		$content_source = curl_exec($ch);

		curl_close($ch);

	

		//获取抓到内容的编码格式



		$encode = mb_detect_encoding($content_source, array('GB2312','GBK','UTF-8','ASCII')); 

		

		//转码

		$content_source = iconv($encode, 'utf-8//IGNORE',$content_source);

		

		//截取