if(isset($_SESSION['user'])){

print_r($_SESSION['user']);

exit;

}

$appid='wx1d7c6fcd6131143b3';

$redirect_url="http://www.antfortune.vip/callback.php";

$scope='snsapi_userinfo';//获取的方式;

$url='https://open.weixin.qq.com/connect/oauth2/authorize?appid='.$appid.'&redirect_uri='.urlencode($redirect_url).'&response_type=code&scope='.$scope.'&state=123#wechat_redirect';

header("Location：".$url);

getOpenid.php

<?php

//获取用户openid

$appid="your appid";

$appsecret="your appsecret";

$code=$_GET[&#39;code&#39;];

function getOpenID($appid,$appsecret,$code){

$url="https://api.weixin.qq.com/sns/oauth2/access_token?appid=".$appid."&secret=".

$appsecret."&code=".$code."&grant_type=authorization_code";

$weixin=file_get_contents($url);//通过code换取网页授权access_token

$jsondecode=json_decode($weixin); //对JSON格式的字符串进行编码

$array = get_object_vars($jsondecode);//转换成数组

$openid = $array[&#39;openid&#39;];//输出openid

return $openid;

}

echo getOpenID($appid,$appsecret,$code);