模拟get和post请求(支持自定义header和测试CDN节点)

<?php  
error_reporting(0);  
$user_agent="Mozilla/5.0 (Windows; U; Windows NT 6.0; en-US; rv:1.9.0.10)";  
 
list($rheaders,$conntent)=request_url("60.28.14.148","80","get","/uploads/allimg/201111/20111109074558511.png",array("User-Agent"=> $user_agent),array());  
 
//list($rheaders,$conntent)=request_url("","","get","http://www.baidu.com/s",array("User-Agent"=>$user_agent),array("wd"=>"test"));  
if($rheaders["httpstatus"]>=200&&$rheaders["httpstatus"]<=300)  
{  
 
  //根据返回的类型，修改header  
  if($rheaders['Content-Type']!="")  
    header('Content-Type: '.$rheaders['Content-Type']);  
    echo  &nb