$ch = curl_init($url);
curl_setopt($ch, CURLOPT_HEADER, 0 ); // 过滤HTTP头
curl_setopt($ch, CURLOPT_TIMEOUT, 40);                                                                                                                   
curl_setopt($ch, CURLOPT_USERAGENT, 'Baiduspider+(+http://www.baidu.com/search/spider.htm)');  
                                                       
$ip = '220.181.7.121';
curl_setopt($ch, CURLOPT_HTTPHEADER, array('X-FORWARDED-FOR:' . $ip, 'CLIENT-IP:' . $ip));                                                               
curl_setopt($ch, CURLOPT_REFERER, "http://www.baidu.com/search/spider.html");                                                                            
 
curl_setopt($ch,CURLOPT_RETURNTRANSFER, 1);// 显示输出结果                                                                                               
$responseText = curl_exec($ch);                                                                                                                          
curl_close($ch);