网页访问
https://open.weixin.qq.com/connect/oauth2/authorize?appid=xxx&redirect_uri=http://dopan.net/ceshiweixin.php&response_type=code&scope=snsapi_userinfo&state=123&connect_redirect=1#wechat_redirect
保存以下内容至文件，回调至这个网页
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=UTF-8">
</head>
<body>
<?php
$code = $_GET['code'];
$state = $_GET['state'];
//换成自己的接口信息
$appid = 'xxx';
$appsecret = 'xxx';
if (empty($code)) $this->error('授权失败');
$token_url = 'https://api.weixin.qq.com/sns/oauth2/access_token?appid='.$appid.'&secret='.$appsecret.'&code='.$code.'&grant_type=authorization_code';
$token = json_decode(file_get_contents($token_url));
if (isset($token->errcode)) {
echo '<h1>错误：</h1>'.$token->errcode;
echo '<br/><h2>错误信息：</h2>'.$token->errmsg;
exit;
}
$access_token_url = 'https://api.weixin.qq.com/sns/oauth2/refresh_token?appid='.$appid.'&grant_type=refresh_token&refresh_token='.$token->refresh_token;
//转成对象
$access_token = json_decode(file_get_contents($access_token_url));
if (isset($access_token->errcode)) {
echo '<h1>错误：</h1>'.$access_token->errcode;
echo '<br/><h2>错误信息：</h2>'.$access_token->errmsg;
exit;
}
$user_info_url = 'https://api.weixin.qq.com/sns/userinfo?access_token='.$access_token->access_token.'&openid='.$access_token->openid.'&lang=zh_CN';
//转成对象
$user_info = json_decode(file_get_contents($user_info_url));
if (isset($user_info->errcode)) {
echo '<h1>错误：</h1>'.$user_info->errcode;
echo '<br/><h2>错误信息：</h2>'.$user_info->errmsg;
exit;
}
//打印用户信息
echo '<pre>';
print_r($user_info);
echo '</pre>';
?>
</body>
</html>
如果微信开发的时候碰到了redirect_uri 参数错误的问题，尝试一下方法
如果授权文件目录为www.xxxx.com/xxx/xxx/OAuth2.0.PHP，那么回调域名就要
填www.xxxx.com/xxx/xxx
