微信网页授权(OAuth2.0) PHP 源码简单实现

提要： 
　　1. 建议对OAuth2.0协议做一个学习。 
　　2. 微信官方文档和微信官网工具要得到充分利用。 
比较简单，直接帖源代码了。其中“xxxxxxxxxx”部分，是需要依据自己环境做替换的

/**  * OAuth2.0微信授权登录实现  *  * @author zzy  * @文件名：GetWxUserInfo.php  */ // 回调地址 $url = urlencode("http://www.xxxxxxxxx.com/GetWxUserInfo.php"); // 公众号的id和secret $appid = 'xxxxxxxxx'; $appsecret = 'xxxxxxxxx'; session_start();  // 获取code码，用于和微信服务器申请token。 注：依据OAuth2.0要求，此处授权登录需要用户端操作 if(!isset($_GET['code']) && !isset($_SESSION['code'])){  echo   '<a href="https://open.weixin.qq.com/connect/oauth2/authorize?appid=wx6c11a252ff1d00c4  &redirect_uri='.$url.'&response_type=code&scope=snsapi_userinfo&state=1#wechat_redirect">  <font style="font-size:30">授权</font></a>';    exit; }  // 依据code码去获取openid和access_token，自己的后台服务器直接向微信服务器申请即可 if (isset($_GET['code']) && !isset($_SESSION['token'])){  $_SESSION['code'] = $_GET['code'];    $url="https://api.weixin.qq.com/sns/oauth2/access_token?appid=".$appid.   "&secret=".$appsecret."&code=".$_GET['code']."&grant_type=authorization_code";  $res = https_request($url);  $res=(json_decode($res, true));  $_SESSION['token'] = $res; }  print_r($_SESSION);  // 依据申请到的access_token和openid，申请Userinfo信息。 if (isset($_SESSION['token']['access_token'])){  $url = "https://api.weixin.qq.com/sns/userinfo?access_token=".$_SESSION['token']['access_token']."&openid=".$_SESSION['token']['openid']."&lang=zh_CN";  echo $url;  $res = https_request($url);  $res = json_decode($res, true);    $_SESSION['userinfo'] = $res; }  print_r($_SESSION); // cURL函数简单封装 function https_request($url, $data = null) {  $curl = curl_init();  curl_setopt($curl, CURLOPT_URL, $url);  curl_setopt($curl, CURLOPT_SSL_VERIFYPEER, FALSE);  curl_setopt($curl, CURLOPT_SSL_VERIFYHOST, FALSE);  if (!empty($data)){   curl_setopt($curl, CURLOPT_POST, 1);   curl_setopt($curl, CURLOPT_POSTFIELDS, $data);  }  curl_setopt($curl, CURLOPT_RETURNTRANSFER, 1);  $output = curl_exec($curl);  curl_close($curl);  return $output; } 

得到正确结果如下：

Array( [code] => 041GZI4l0tvGHg10N75l05FQ4l0GZI42 [token] => Array  (   [access_token] => TWo6w5QMpzTZibu3FPh2k4EdC5bllp4sGeQkC4NbZtj-zti-ctZj1SrrNL1qGCf2lB1-6o3N7kh2bcxl5bxtQqJEGk1cq12l8CzF40R9XvA   [expires_in] => 7200   [refresh_token] => Iz3olCrkqPBOJvSSH2bOKvA09Sjvsp1c8Ltm7MvxxPfQXSbvI_WoVmzhjqASzwlMa7TAGgsg3mIJmaHjL7jrJHDqUF1jKbhd6GNDnLtXq0U   [openid] => ota_XwQ4r_5nioVmshQ   [scope] => snsapi_userinfo  ) [userinfo] => Array  (   [openid] => ota_XwQ4r_5nioVmshQq   [nickname] => 野狐   [sex] => 1   [language] => zh_CN   [city] => 杭州   [province] => 浙江   [country] => 中国   [headimgurl] => http://wx.qlogo.cn/mmopen/PiajxSqBRaELwee7rhrt2ibnkC1MEnu04WiaWrw9FkuPBbGOgnrMbynNoEuxicgXOetW5VqQbTrS4fZDXNvAWsz6GQ/0   [privilege] => Array    (    )  ))