【微信】根據appid, secret, code獲取使用者基本資訊

function getUserInfo(){
    $appid = "yourappid"; 
    $secret = "yoursecret"; 
    $code = $_GET["code"]; 
    $get_token_url = 'https://api.weixin.qq.com/sns/oauth2/access_token?appid='.$appid.'&secret='.$secret.'&code='.$code.'&grant_type=authorization_code'; 
       
    $ch = curl_init(); 
    curl_setopt($ch,CURLOPT_URL,$get_token_url); 
    curl_setopt($ch,CURLOPT_HEADER,0); 
    curl_setopt($ch, CURLOPT_RETURNTRANSFER, 1 ); 
    curl_setopt($ch, CURLOPT_CONNECTTIMEOUT, 10); 
    $res = curl_exec($ch); 
    curl_close($ch); 
    $json_obj = json_decode($res,true); 
       
    //根據openid和access_token查詢使用者資訊 
    $access_token = $json_obj['access_token']; 
    $openid = $json_obj['openid']; 
    $get_user_info_url = 'https://api.weixin.qq.com/sns/userinfo?access_token='.$access_token.'&openid='.$openid; 
       
    $ch = curl_init(); 
    curl_setopt($ch,CURLOPT_URL,$get_user_info_url); 
    curl_setopt($ch,CURLOPT_HEADER,0); 
    curl_setopt($ch, CURLOPT_RETURNTRANSFER, 1 ); 
    curl_setopt($ch, CURLOPT_CONNECTTIMEOUT, 10); 
    $res = curl_exec($ch); 
    curl_close($ch); 
       
    //解析json 
    $user_obj = json_decode($res,true); 
    $_SESSION['user'] = $user_obj; 
    //print_r($user_obj);
    return $user_obj;
}