用PHP进行HTTP认证,该怎么处理

$url = "http://www.vividchanelhandbags.com/images/20000665.jpg";
$ch = curl_init($url);
$useragent = "Mozilla/4.0 (compatible; MSIE 6.0; Windows NT 5.1; SV1)";      
$header = array('Accept-Language: zh-cn','Connection: Keep-Alive','Cache-Control: no-cache'); 

//HEADER信息   
curl_setopt($ch,CURLOPT_HTTPHEADER,$header);      
//USER_AGENT   
curl_setopt($ch, CURLOPT_USERAGENT, $useragent); 
curl_setopt( $ch, CURLOPT_USERPWD , "test:123789");
$response = curl_exec($ch);
//你获取的是图片二进制内容,要显示图片,就得告诉浏览器,内容格式是什么
header("content-type:image/jpg");
echo $response;

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PHP code