微信网页授权接口代码示例

OAuth2.0网页授权演示 
<a href="https://open.weixin.qq.com/connect/oauth2/authorize?appid=wx3b83200000000000&redirect_uri=http://www.domain.com/oauth2.php&response_type=code&scope=snsapi_userinfo&state=1#wechat_redirect">点击这里</a>

回调页面

<?php
if (isset($_GET['code'])){
  //  echo $_GET['code'];

	//通过code换取token
	$code = $_GET['code'];
	$url = "https://api.weixin.qq.com/sns/oauth2/access_token?appid=wx3b0000000&secret=575e05512121xxxxxxxxxxx&code=$code&grant_type=authorization_code";
	$json = file_get_contents($url);
	$arr = json_decode($json,true);
	$token = $arr['access_token'];
	$openid = $arr['openid'];
	//拿到token后就可以获取用户基本信息了
	$url = "https://api.weixin.qq.com/sns/userinfo?access_token=$token&openid=$openid ";
	$json = file_get_contents($url);//获取微信用户基本信息
	$arr = json_decode($json,true);
	$name = $arr['nickname'];//昵称
	$imgURL = $arr['headimgurl'];//头像地址
	$sex = $arr['sex'];//性别
	$province = $arr['province'];//用户个人资料填写的省份
	$city= $arr['city'];//普通用户个人资料填写的城市
	$country= $arr['country'];//国家，如中国为CN

	echo "OpenID:".$openid."<br/>";
	echo "昵称：".$name."<br/>"."头像地址：".$imgURL."<br/>"."性别：".$sex."<br/>"."省份：".$province."<br/>"."城市：".$city."<br/>";
	echo "<img src='".$imgURL."' />";

}else{
    echo "NO CODE";
}
?>