php微博登录code换取access_token出错

Question

$code=$_GET['code'];         //echo $code; exit;         $url='https://api.weibo.com/oauth2/access_token';         $redirect_uri='...';         $appid='...';         //$url='https://api.weibo.com/oauth2/authorize?client_id='.$appid.'&redirect_uri='.$redirect_uri.'&response_type=code';         $data=array(             'client_id'=>'...',             'client_secret'=>'...',             'grant_type'=>'authorization_code',             'code'=>$code,             'redirect_uri'=>'...'             );         //$postfields=http_build_query($data);         $ch=curl_init();         curl_setopt($ch,CURLOPT_URL,$url);         curl_setopt($ch,CURLOPT_RETURNTRANSFER,1);         curl_setopt($ch,CURLOPT_POST,1);         curl_setopt($ch,CURLOPT_POSTFIELDS,$data);         $output=curl_exec($ch);         if(curl_errno($ch)){             return curl_error($ch);         }         curl_close($ch);         $arr=json_decode($output,true);         var_dump($arr);报错如图，求指导。

Answer 1

报错
Fatal error: Call to undefined function curl_init() in 
D:\wamp\www\test\one.php on line 17
$ch = curl_init();

你是不是没开启curl_init()