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$REDIRECT_URI=‘http://www.111cn.net/callback.php‘;
$state = ‘init‘;//自定义参数
$scope=‘snsapi_base‘;
//$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.111cn.net/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‘;
$res = httpRequest($get_token_url);
$json_obj = json_decode($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‘;
//解析json
$user_obj = json_decode($res,true);
$_SESSION[‘user‘] = $user_obj;
print_r($user_obj);
function httpRequest($url, $data=null){
?>
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原文地址:http://www.cnblogs.com/qhorse/p/4627639.html