PHP實現微信網頁授權登陸

這篇文章主要介紹的內容是關於PHP實現網頁授權登陸，有著一定的參考價值，現在分享給大家，有需要的朋友可以參考一下

公司要求有授權，自己研究了下，架構是tp3.2.

官方開發文檔地址

https://open.weixin.qq.com/cgi-bin/showdocument?action=dir_list&t=resource/res_list&verify=1&id=open1419316505&token=&lang=zh_CN；

1.識別瀏覽器，普通瀏覽器跳到登陸頁面；開啟的話，發起網頁授權登陸，使用者允許授權第三方應用後，會拉起應用或重新導向到第三方網站，並且帶上授權臨時票據code參數；

2.通過code參數加上AppID和AppSecret等，通過API換取access_token；

3.通過access_token進行介面調用，擷取使用者基本資料資源或協助使用者實現基本操作。

<?phpnamespace Home\Controller;use Think\Controller;class CommonController extends Controller {    /*    * 自動執行    */    public function _initialize(){        //判斷是否在開啟        $ua = $_SERVER['HTTP_USER_AGENT'];        //MicroMessenger 是android/iphone版所帶的        //Windows Phone 是winphone版帶的  (這個標識會誤傷winphone普通瀏覽器的訪問)        if(strpos($ua, 'MicroMessenger') == false && strpos($ua, 'Windows Phone') == false){            //普通瀏覽器            if(!$_SESSION['username']) {                header('Location:xxx');            }        }else{              //瀏覽器            $users = M('User');            $appid = 'xxx';            $secret = 'xxx';            if(!$_SESSION['username']) {                //網頁授權                $redirect_uri = urlencode ('http://'.$_SERVER['HTTP_HOST'].$_SERVER['REQUEST_URI']);                $url ="https://open.weixin.qq.com/connect/oauth2/authorize?appid=$appid&redirect_uri=$redirect_uri&response_type=code&scope=snsapi_userinfo&state=1&connect_redirect=1#wechat_redirect";                header("Location:".$url);                $code = $_GET["code"];                //第一步:取得openid                $oauth2Url = "https://api.weixin.qq.com/sns/oauth2/access_token?appid=$appid&secret=$secret&code=$code&grant_type=authorization_code";                $oauth2 = $this->getJson($oauth2Url);                //第二步:根據全域access_token和openid查詢使用者資訊                $access_token = $oauth2["access_token"];                $openid = $oauth2['openid'];                $get_user_info_url = "https://api.weixin.qq.com/sns/userinfo?access_token=$access_token&openid=$openid&lang=zh_CN";                $userinfo = $this->getJson($get_user_info_url);                //save使用者資訊                if($userinfo['openid']){                    $username = $userinfo['openid'];                    $nickname = $userinfo['nickname'];                    $headimg = $userinfo['headimgurl'];                    $province = $userinfo['province'];                    $city = $userinfo['city'];                    $sex = $userinfo['sex'];                    $user = $users->where(array('username' => $username))->find();                    if ($user) {                        $users->where(array('username' => $username))->save(array('nickname' => $nickname, 'avatar' => $headimg, 'lasttime' => time()));                    }else{                        $users->add(array('username' => $username, 'nickname' => $nickname, 'avatar' => $headimg, 'province' => $province, 'city' => $city, 'gender' => $sex, 'regtime' => time(), 'lasttime' => time()));                        // $data = array('username' => $username, 'nickname' => $nickname, 'avatar' => $headimg, 'province' => $province, 'city' => $city, 'gender' => $sex, 'regtime' => time(), 'lasttime' => time());                    }                    $_SESSION['username'] = $username;                    if($user['tel'] == NULL){                        //如果使用者手機號為空白的話跳轉到綁定手機號頁面                        header('Location:xxx');                     }                }                            }else{                $user = D('User')->getUserInfo();  //getUserInfo()是model根據session('username')擷取使用者資料的方法                if($user['tel'] == NULL){                    header('Location:xxx');                }            }            //擷取介面調用憑證access_token            $accessurl = 'https://api.weixin.qq.com/cgi-bin/token?grant_type=client_credential&appid='.$appid.'&secret='.$secret;            $access_token = S('access_token');            if(!$access_token){                $access = $this->getJson($accessurl);                if(!empty($access['access_token'])){                    S('access_token',$access['access_token'],$access['expires_in']);                }            }            //分享            /*$share = new WechatShare($appid, $_SESSION['username']);            $this->shareScript = $share->getSgin($access_token);            $this->assign('shareScript', $this->shareScript);            $this->assign('sharewechaid', $_SESSION['username']);            if($_GET['sharewechaid']){                $this->assign('getsharewechaid', $_GET['sharewechaid']);            }*/         }    }    public function getJson($url){        $ch = curl_init();        curl_setopt($ch, CURLOPT_URL, $url);        curl_setopt($ch, CURLOPT_SSL_VERIFYPEER, FALSE);        curl_setopt($ch, CURLOPT_SSL_VERIFYHOST, FALSE);        curl_setopt($ch, CURLOPT_RETURNTRANSFER, 1);        $output = curl_exec($ch);        curl_close($ch);        return json_decode($output, true);    }}

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