php curl通过代理获取数据

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$curl=curl_init();
			curl_setopt($curl, CURLOPT_URL, "http://www.baidu.com/");
			curl_setopt($curl, CURLOPT_USERAGENT, 'Mozilla/5.0 (X11; Ubuntu; Linux i686; rv:20.0) Gecko/20100101 Firefox/20.0');
			curl_setopt($curl, CURLOPT_REFERER, 'http://www.guahao.com/');
			curl_setopt($curl, CURLOPT_POST, true);
			curl_setopt($curl, CURLOPT_POSTFIELDS, http_build_query($param));
			curl_setopt($curl, CURLOPT_RETURNTRANSFER, true);
			curl_setopt($curl, CURLOPT_HTTPPROXYTUNNEL, true);
			curl_setopt($curl, CURLOPT_PROXYAUTH, CURLAUTH_BASIC);
			curl_setopt($curl, CURLOPT_PROXYTYPE, CURLPROXY_SOCKS5);
			curl_setopt($curl, CURLOPT_PROXY, "180.186.11.121");
			curl_setopt($curl, CURLOPT_PROXYPORT, "37211");
			curl_setopt($curl, CURLOPT_PROXYUSERPWD, "taras:taras-ss5");
			
			$result=curl_exec($curl);