本文实例讲述了微信公众平台实现获取用户OpenID的方法。分享给大家供大家参考。具体分析如下:
用户点击微信自定义菜单view类型按钮后,微信客户端将会打开开发者在按钮中填写的url值 (即网页链接),达到打开网页的目的,但是view不能获取用户的openid,需要使用微信“网页授权获取用户基本信息”高级接口结合使用,获得用户的登入个人信息。
具体方法:
1、配置网页授权回调域名,如 www.bitsCN.com
2、模拟公众号的第三方网页,http://www.bitsCN.com/getcodeurl.php
<?php if(isset($_SESSION['user'])){ print_r($_SESSION['user']); exit; } $APPID='公众号在微信的appid'; $REDIRECT_URI='http://www.bitsCN.com/callback.php'; $scope='snsapi_base'; //$scope='snsapi_userinfo';//需要授权 $url='https://open.weixin.qq.com/connect/oauth2/authorize?appid='.$APPID.'&redirect_uri='.urlencode($REDIRECT_URI).'&response_type=code&scope='.$scope.'&state='.$state.'#wechat_redirect'; header("Location:".$url); ?>
3、第三方网页的回跳url中,首先从请求中取得code,然后根据code进一步换取openid和access_token,然后就可以根据openid和access_token调用微信的相关接口查询用户信息了。
<?php //http://www.bitsCN.com/callback.php $appid = "公众号在微信的appid"; $secret = "公众号在微信的app secret"; $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); //根据openid和access_token查询用户信息 $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.'&lang=zh_CN'; $ch = curl_init(); curl_setopt($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); ?>
希望本文所述对大家基于php的微信公众平台开发有所帮助。

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