比如鏈接為 https://open.weixin.qq.com/connect/oauth2/authorize?appid='.$appid.'&redirect_uri='.$url.'&response_type=code&scope=snsapi_userinfo&state=1#wechat_redirect' 我們可以在state上做文章，因為state你傳入什么微信那邊返回什么

可以作為服務器與微信段的一個標識:

public function creatqrAction(){
if($_GET['app']){
$wtoken=$_COOKIE['wtoken'];
$postdata=$_SESSION['w_state'];
if($wtoken){
$postdata=$wtoken;
}
include CONFIG_PATH . 'phpqrcode/'.'phpqrcode.php'
$sh=$this->shar1();
$value="https://open.weixin.qq.com/connect/oauth2/authorize?appid=wx138697ef383a9167&redirect_uri=http://www.xxx.net/login/wcallback&response_type=code&scope=snsapi_userinfo&state=".$postdata."&connect_redirect=1#wechat_redirect";
$errorCorrectionLevel = "L";
$matrixPointSize = "5";
QRcode::png($value, false, $errorCorrectionLevel, $matrixPointSize);
}
}

此時生成了二維碼 state是標識，phpqrcode可以在文章末尾下載,這樣我們設置了回調(diào)地址http://www.xxx.net/login/wcallback

就可以在wcallback方法里面處理數(shù)據(jù) 插入用戶生成session，跳轉(zhuǎn)登陸，pc端可以設置幾秒鐘ajax請求服務器，一旦獲取到了state,即實現(xiàn)調(diào)整，微信瀏覽器里處理完后可以關閉窗口,微信js可實現(xiàn):

document.addEventListener('WeixinJSBridgeReady', function onBridgeReady() {
WeixinJSBridge.call('closeWindow');}, false);

也可以授權登陸成功后跳轉(zhuǎn)到微信服務號關注頁面:

header("Location: weixin://profile/gh_a5e1959f9a4e");
wcallback方法做處理登陸
$code = $_GET['code'];
$state = $_GET['state'];
$setting = include CONFIG_PATH . 'setting.php'
$appid=$setting['weixin']['appid'];
$appsecret=$setting['weixin']['appsecret'];
if (emptyempty($code)) $this->showMessage('授權失敗');
try{
$token_url = 'https://api.weixin.qq.com/sns/oauth2/access_token?appid='.$appid.'&secret='.$appsecret.'&code='.$code.'&grant_type=authorization_code'
$token = json_decode($this->https_request($token_url));
}catch(Exception $e)
{
print_r($e);
}
if (isset($token->errcode)) {
echo '錯誤：'.$token->errcode;
echo '錯誤信息：'.$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;
//轉(zhuǎn)成對象
$access_token = json_decode($this->https_request($access_token_url));
if (isset($access_token->errcode)) {
echo '錯誤：'.$access_token->errcode;
echo '錯誤信息：'.$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'
//轉(zhuǎn)成對象
$user_info = json_decode($this->https_request($user_info_url));
if (isset($user_info->errcode)) {
echo '錯誤：'.$user_info->errcode;
echo '錯誤信息：'.$user_info->errmsg;
exit;
}
//打印用戶信息
// echo ''
// print_r($user_info);
// echo ''

phpqrcode類庫下載在此不提供各位可以百度搜索下載

magento微信掃碼網(wǎng)站自動登錄的例子
https://open.weixin.qq.com/cgi-bin/showdocument?action=dir_list&t=resource/res_list&verify=1&lang=zh_CN

查看授權后接口調(diào)用（UnionID），不難發(fā)現(xiàn)填寫回調(diào)地址，用戶確認登陸pc端即可跳轉(zhuǎn)

獲取UnionID方法

public function wcallbackAction(){
$code = $_GET['code'];
$state = $_GET['state'];
$setting = include CONFIG_PATH . 'setting.php';
$appid=$setting['weixin']['appid'];
$appsecret=$setting['weixin']['appsecret'];
if (emptyempty($code)) $this->showMessage('授權失敗');
try{
$token_url = 'https://api.weixin.qq.com/sns/oauth2/access_token?appid='.$appid.'&secret='.$appsecret.'&code='.$code.'&grant_type=authorization_code';
$token = json_decode($this->https_request($token_url));
}catch(Exception $e)
{
print_r($e);
}
if (isset($token->errcode)) {
echo '<h1>錯誤：</h1>'.$token->errcode;
echo '<br/><h2>錯誤信息：</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;
//轉(zhuǎn)成對象
$access_token = json_decode($this->https_request($access_token_url));
if (isset($access_token->errcode)) {
echo '<h1>錯誤：</h1>'.$access_token->errcode;
echo '<br/><h2>錯誤信息：</h2>'.$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';
//轉(zhuǎn)成對象
$user_info = json_decode($this->https_request($user_info_url));
if (isset($user_info->errcode)) {
echo '<h1>錯誤：</h1>'.$user_info->errcode;
echo '<br/><h2>錯誤信息：</h2>'.$user_info->errmsg;
exit;
}
//打印用戶信息
// echo '<pre>';
// print_r($user_info);
// echo '</pre>';
//獲取unionid
$uid=$user_info->unionid;
}
//用戶操作處理 分為再次登錄和第一次登陸
$sql="select h_user_id from dtb_user_binded as t1 left join dtb_user_weixin as t2 on t1.u_id=t2.id where t1.u_type='".
User::$arrUtype['weixin_num_t']."' and t2.openid='$user_info->unionid'";
$h_user_id = Core_Db::getOne($sql);
if(!emptyempty($h_user_id)){//該weixin號再次登錄
}{//該weixin號第一次登錄
}

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