摘要：微信授權第三方應用平臺微信第三方應用平臺微信第三方應用平臺微信第三方應用平臺消息檢驗微信第三方應用平臺消息加解密微信公眾號小程序授權給第三方應用平臺授權后的回調地址值授權類型，公眾號，小程序授權鏈接接收微信消息自身推送事件，

component_appid     = $component_appid;
        $this->component_secret = $component_secret;
        $this->component_token     = $component_token;
        $this->component_key     = $component_key;
    }

    /*
    *微信公眾號/小程序授權給第三方應用平臺
    *@params string $redirect_url : 授權后的回調地址
    *@params string $ticket : component_verify_ticket值
    *@params int $auth_type : 授權類型，1公眾號，2小程序
    *return string $auth_url : 授權鏈接
     */
    public function start_authorization($redirect_uri,$ticket,$auth_type)
    {
        $component_access_token = $this->get_component_access_token($ticket);
        $pre_auth_code = $this->get_pre_auth_code($component_access_token);
        return "https://mp.weixin.qq.com/cgi-bin/componentloginpage?component_appid=".$this->component_appid."&pre_auth_code=".$pre_auth_code."&redirect_uri=".urlencode($redirect_uri)."&auth_type=".$auth_type;
    }
    /*
    *接收微信消息自身推送事件，如：公眾號/小程序取消授權，ticket值等
    *解密ticket值/AuthorizerAppid
    *對應的URL鏈接在微信應用第三方平臺中填寫的“授權事件接收URL”
     */
    public function receiveMsg()
    {
        require_once("crypt/wxBizMsgCrypt.php");
        $encryptMsg = isset($GLOBALS["HTTP_RAW_POST_DATA"]) ? $GLOBALS["HTTP_RAW_POST_DATA"] : file_get_contents("php://input");
        $xml_tree = new DOMDocument();
        $xml_tree->loadXML($encryptMsg);
        $xml_array = $xml_tree->getElementsByTagName("Encrypt");
        $encrypt = $xml_array->item(0)->nodeValue;
        $Prpcrypt = new Prpcrypt($this->component_key);
        $postData = $Prpcrypt->decrypt($encrypt, $this->component_appid);
        if($postData[0] != 0){
            return $postData[0];
        } else {
            $xml = new DOMDocument();
            $xml->loadXML($postData[1]);
            $array_a = $xml->getElementsByTagName("InfoType");
            $infoType = $array_a->item(0)->nodeValue;
            //取消授權
            if($infoType == "unauthorized") {
                $array_b = $xml->getElementsByTagName("AuthorizerAppid");
                $AuthorizerAppid = $array_b->item(0)->nodeValue;
            }
            //ticket值
            elseif($infoType == "component_verify_ticket") {
                $array_e = $xml->getElementsByTagName("ComponentVerifyTicket");
                $component_verify_ticket = $array_e->item(0)->nodeValue;
            }
        }
    }
    /*
    *獲取微信第三方應用平臺componet_access_token
    *@params string $component_ticket : 第三方應用平臺ticket值（每10分鐘微信后臺將推送該值）
    *return string $compoent_access_token : 第三方應用平臺access_token
     */
    private function get_component_access_token($component_verify_ticket)
    {

        $json = json_decode(file_get_contents("component_access_token.json"));
        if(isset($json->component_access_token) && !empty($json->component_access_token) && ($json->expires_in < time()) ){
            return $json->component_access_token;
        } else {
            $url = "https://api.weixin.qq.com/cgi-bin/component/api_component_token";
            $data = "{"component_appid":"".$this->component_appid."","component_appsecret":"".$this->component_secret."","component_verify_ticket":"".$component_verify_ticket.""}";
            $ret = json_decode($this->https_post($url,$data));
            if(isset($ret->component_access_token)) {
                $json = "{"component_access_token":"".$ret->component_access_token."","expires_in":"".(time() + $ret->expires_in).""}";
                file_put_contents("component_access_token.json",$json);
                return $ret->component_access_token;
            } else {
                return null;
            }
        }
    }
    /*
    *獲取預授權碼pre_auth_code
    *@params string $component_access_token : 第三方應用平臺access_token
    *return json $ret : 返回pre_auth_code、expires_in
     */
    private function get_pre_auth_code($component_access_token)
    {
        $json = json_decode(file_get_contents("pre_auth_code.json"));
        if(isset($json->pre_auth_code) && !empty($json->pre_auth_code) && ($json->expires_in < time()) ){
            return $json->pre_auth_code;
        } else {
            $url = "https://api.weixin.qq.com/cgi-bin/component/api_create_preauthcode?component_access_token=".$component_access_token;
            $data = "{"component_appid":"".$this->component_appid.""}";
            $ret = json_decode($this->https_post($url,$data));
            if(isset($ret->pre_auth_code)) {
                $json = "{"pre_auth_code":"".$ret->pre_auth_code."","expires_in":"".(time() + $ret->expires_in).""}";
                file_put_contents("pre_auth_code.json",$json);
                return $ret->pre_auth_code;
            } else {
                return null;
            }
        }
    }

    /*
    *發送https_post請求
    *@params string $url : URL鏈接
    *@params json $data : 發送JSON數據
    *return json $ret : 返回請求的結果
     */
    private function https_post($url,$data)
    {
        $curl = curl_init();
        curl_setopt($curl, CURLOPT_URL, $url);
        if (!empty($data)){
            curl_setopt($curl, CURLOPT_POST, 1);
            curl_setopt($curl, CURLOPT_POSTFIELDS, $data);
        }
        curl_setopt($curl, CURLOPT_RETURNTRANSFER, 1);
        $output = curl_exec($curl);
        curl_close($curl);
        return $output;
    }
    /*
    *發送https_get請求
    *@params string $url : URL鏈接
    *return json $ret : 返回請求的結果
     */
    private function https_get($url)
    {
        $curl = curl_init();
        curl_setopt($curl, CURLOPT_URL, $url); 
        curl_setopt($curl, CURLOPT_RETURNTRANSFER, TRUE); 
        curl_setopt($curl, CURLOPT_SSL_VERIFYPEER, FALSE); 
        curl_setopt($curl, CURLOPT_SSL_VERIFYHOST, FALSE);
        curl_setopt($curl, CURLOPT_HEADER, FALSE) ; 
        curl_setopt($curl, CURLOPT_TIMEOUT,60);    
        if (curl_errno($curl)) {
            return "Errno".curl_error($curl);
        }
        else{$result=curl_exec($curl);}
        curl_close($curl);
        return $result;
    }
}



$link = mysqli_connect("localhost","root","root","weixin");
$sql = " select `appId`,`appSecret`,`token`,`encodingAesKey`,`component_verify_ticket`,`component_access_token` from `weixin` where `type` = 1 ";
$result = mysqli_query($link,$sql);
$component = [];
while ($row = mysqli_fetch_assoc($result)) {
    $component["appid"] = $row["appId"];
    $component["secret"] = $row["appSecret"];
    $component["token"] = $row["token"];
    $component["key"] = $row["encodingAesKey"];
    $component["ticket"] = $row["component_verify_ticket"];
    $component["component_access_token"] = $row["component_access_token"];
}
$authorize = new Authorize($component["appid"],$component["secret"],$component["token"],$component["key"]);
$auth_url = $authorize->start_authorization("http://www.baidu.com/user/authorize_back.html",$component["ticket"],1);
echo "".$auth_url."";
?>

crypt為微信官方消息解密demo包，下載地址：https://wximg.gtimg.com/shake...