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>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] => [privilege] => Array ( ) ) )