1 <?php 2 //启用session 3 session_start(); 4 //编码 5 header("Content-type: text/html; charset=utf-8"); 6 //保存微信openid 7 $weixin_openid = ""; 8 //保存从微信得到的code 9 $code = "";10 //获得菜单中设置的state值11 $state = "";12 13 //修改为注册的测试号信息14 $appid = "wx834404c1d1dbb5ec";15 $secret = "bf03cfa823d80dd537bd18e83ce9a4e4";16 17 if (isset($_GET[‘code‘]) && isset($_GET[‘state‘]) ){18     $weixin_openid = GetOpenid($_GET[‘code‘]);19     $code = $_GET[‘code‘];20     $state = $_GET[‘state‘];21     //echo $resultStr;22 }else{23     echo "NO CODE";24     return ;25 }26 27 // store session data28 $_SESSION[‘weixin_openid‘]=$weixin_openid;29 30 if($state == "s1"){31     //我的课堂32     header(‘Location: courseCenter.php‘);33 }else if($state == "s2"){34     //订单记录35     header(‘Location: orderList.php‘);36 }else{37     $textTpl="由认证接口进入我的课堂,<br/>您的 wx_openid: %s <br/> code: %s <br/> state: %s <br/>38     <a href=http://www.mamicode.com/‘orderList.php‘>订单记录";39     $resultStr = sprintf($textTpl, $weixin_openid, $code, $state);40 41     echo  $resultStr ;42 }43 44 45 46 //获取微信的openid47 function GetOpenid($c_code)48 {49     $url = "https://api.weixin.qq.com/sns/oauth2/access_token?appid=" . $appid . "&secret=" . $secret . "&code=" . $c_code .  "&grant_type=authorization_code";50     //$url = "http://www.baidu.com";51     $result = getData($url);52 53     $jsondecode = json_decode($result);54     if($jsondecode != null){55         if(property_exists ( $jsondecode, "openid" ) )56         {57             return $jsondecode->{"openid"};58         }else{59             return "code is invalid.";60         }61     }62 63     return null;64 }65 //获取https的get请求结果66 function getData($c_url)67 {68     $curl = curl_init(); // 启动一个CURL会话69     curl_setopt($curl, CURLOPT_URL, $c_url); // 要访问的地址70     curl_setopt($curl, CURLOPT_SSL_VERIFYPEER, 0); // 对认证证书来源的检查71     curl_setopt($curl, CURLOPT_SSL_VERIFYHOST, 1); // 从证书中检查SSL加密算法是否存在72     curl_setopt($curl, CURLOPT_USERAGENT, $_SERVER[‘HTTP_USER_AGENT‘]); // 模拟用户使用的浏览器73     curl_setopt($curl, CURLOPT_FOLLOWLOCATION, 1); // 使用自动跳转74     curl_setopt($curl, CURLOPT_AUTOREFERER, 1); // 自动设置Referer75 //    curl_setopt($curl, CURLOPT_POST, 1); // 发送一个常规的Post请求76 //    curl_setopt($curl, CURLOPT_POSTFIELDS, $data); // Post提交的数据包77     curl_setopt($curl, CURLOPT_TIMEOUT, 30); // 设置超时限制防止死循环78     curl_setopt($curl, CURLOPT_HEADER, 0); // 显示返回的Header区域内容79     curl_setopt($curl, CURLOPT_RETURNTRANSFER, 1); // 获取的信息以文件流的形式返回80     $tmpInfo = curl_exec($curl); // 执行操作81     if (curl_errno($curl)) {82        echo ‘Errno‘.curl_error($curl);//捕抓异常83     }84     curl_close($curl); // 关闭CURL会话85     return $tmpInfo; // 返回数据86 }87 88 ?>