token = $wx_token; $this->captcha = $wx_captcha; } private function __checkSignature() { $signature = $_GET["signature"]; $timestamp = $_GET["timestamp"]; $nonce = $_GET["nonce"]; $token = $this->token; $tmpArr = array($token, $timestamp, $nonce); sort($tmpArr, SORT_STRING); $tmpStr = implode($tmpArr); $tmpStr = sha1($tmpStr); return $tmpStr == $signature ? true : false; } protected function _valid() { $echoStr = $_GET["echostr"]; //valid signature , option if ($this->checkSignature()) { echo $echoStr; exit; } else { echo 'error signature'; } } public function responseMsg() { //如果是验证请求,则执行签名验证并退出 if (!empty($_GET["echostr"])) { $this->valid(); //验证签名是否有效 return; //返回退出 } if ($_SERVER['REQUEST_METHOD'] != 'POST') { 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 ($messgeType == 'text' && $keyword == '验证码') { $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 $xmlText; } } else { echo ""; exit; } } } function wx_process() { if(isset($_GET["signature"])) { global $wx_captchas; if(!isset($wx_captchas)) { $wx_token = trim(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);