php获取公众号_PHP 获取微信公众号openid

在公众号设置->功能设置->网页授权域名->添加域名授权

```

header("Content-type: text/html; charset=utf-8");

$sosid_Composite_Point_Coding = $_GET['sosid_Composite_Point_Coding'];

$s_id = $_GET['s_id'];

if(!isset($_GET['code'])){

$APPID='xxxxxxxx';

// $REDIRECT_URI='http://baidu.com';

$REDIRECT_URI='http://www.xxx.cn/php.php';

$scope='snsapi_base'; //snsapi_base snsapi_userinfo

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

header("Location:".$url);

}else{

$appid = "xxxxxxxx";

$secret = "xxxxxxxx";

$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);

// print_r("
");

// print_r($get_user_info_url);

// print_r("
");

// print_r($openid);

// return json_decode($openid);

print_r("".$openid." ");

// echo ""$openid."";

Header("Location:http://www.xxx.cn/admin/sosid/gp ... osite_Point_Coding=".$sosid_Composite_Point_Coding."&openid=".$openid."&s_id=".$s_id);

}

```