token = $wx_token; $this->captcha = $wx_captcha; } private function __checkSignature() { $signature = $_GET['signature']; $timestamp = $_GET['timestamp']; $nonce = $_GET['nonce']; $token = $this->token; $tmpArr = [$token, $timestamp, $nonce]; sort($tmpArr, SORT_STRING); $tmpStr = implode($tmpArr); $tmpStr = sha1($tmpStr); return $tmpStr == $signature ? true : false; } public function responseMsg() { //如果是验证请求,则执行签名验证并退出 if (!empty($_GET['echostr'])) { $this->valid(); //验证签名是否有效 return; //返回退出 } if ('POST' != $_SERVER['REQUEST_METHOD']) { echo ''; return; } //如果不是验证请求，则 //首先，取得POST原始数据(XML格式) //$postData = $GLOBALS["HTTP_RAW_POST_DATA"]; $postData = file_get_contents('php://input'); if (empty($postData)) { echo ''; return; } //如果没有POST数据，则退出 if (!empty($postData)) { //解析POST数据(XML格式) $object = simplexml_load_string($postData, 'SimpleXMLElement', LIBXML_NOCDATA); $messgeType = trim($object->MsgType); //取得消息类型 $this->fromUser = $object->FromUserName; $this->toUser = $object->ToUserName; $keyword = trim($object->Content); if ('text' == $messgeType && '验证码' == $keyword) { $response_content = '您的验证码为：【'.$this->captcha.'】，验证码有效期为2分钟，请抓紧使用，过期需重新申请'; $xmlTemplate = ' %s %d '; $xmlText = sprintf($xmlTemplate, $this->fromUser, $this->toUser, time(), $response_content, 0); echo $xmlText; } } else { echo ''; exit; } } protected function _valid() { $echoStr = $_GET['echostr']; //valid signature , option if ($this->checkSignature()) { echo $echoStr; exit; } echo 'error signature'; } } function wx_process() { if (isset($_GET['signature'])) { global $wx_captchas; if (!isset($wx_captchas)) { $wx_token = gdk_option('gdk_wxmp_token'); $wx_captchas = new Wechat_Captcha($wx_token, wx_captcha()); $wx_captchas->responseMsg(); exit; } } } add_action('parse_request', 'wx_process', 4);