cur怎么显示验证码
要显示的网址为:https://pin.aliyun.com/get_img?sessionid=47b7c5dbac3eb7cf9f678227fadd3e67&identity=taobao.login&type=150_40&_r_=1427727728245
用了一些常规方法代码都不行呢，是不是有些有些参数没有传入呢？有朋友知道的指点下小弟哈
$curl = curl_init();
curl_setopt($curl, curlopt_url, 'https://pin.aliyun.com/get_img?sessionid=47b7c5dbac3eb7cf9f678227fadd3e67&identity=taobao.login&type=150_40&_r_=1427727728245');
curl_setopt($curl, curlopt_referer, '');
curl_setopt($curl, curlopt_useragent, '');
curl_setopt($curl, curlopt_returntransfer, 1);
$result = curl_exec($curl);
header('content-type: image/jpeg');
echo $result;

------解决思路----------------------
$curl = curl_init();
curl_setopt($curl, curlopt_url, 'https://pin.aliyun.com/get_img?sessionid=47b7c5dbac3eb7cf9f678227fadd3e67&identity=taobao.login&type=150_40&_r_=1427727728245');
curl_setopt($curl, curlopt_referer, ''); //这句可以不要
curl_setopt($curl, curlopt_useragent, ''); //这句可以不要
curl_setopt($curl, curlopt_returntransfer, 1);
curl_setopt($curl, curlopt_ssl_verifypeer, false); //这句一定要，因为是 https
curl_setopt($curl, curlopt_ssl_verifyhost, false); //这句可以不要
$result = curl_exec($curl);
header('content-type: image/jpeg'); //这句可以不要
echo $result;