$params['key'] = "d4899e2a-7ea8-40ab-a0d2-f258ddd7de15";$params['lc'] = "ch";$params['ft'] = "1.0";$params['text'] = $keyword;$url = "http://sandbox.api.simsimi.com/request.p?".http_build_query($params);

    $ch = curl_init();curl_setopt($ch, CURLOPT_URL, $url);curl_setopt($ch, CURLOPT_RETURNTRANSFER, 1);$output = curl_exec($ch);curl_close($ch);

    $message = json_decode($output,true);$result = "";if ($message['result'] == 100){$result = $message['response'];}else{$result = $message['result'].$message['msg'];}

function callSimsimi($keyword)
{$params['key'] = "d4899e2a-7ea8-40ab-a0d2-f258ddd7de15";$params['lc'] = "ch";$params['ft'] = "1.0";$params['text'] = $keyword;$url = "http://sandbox.api.simsimi.com/request.p?".http_build_query($params);$ch = curl_init();curl_setopt($ch, CURLOPT_URL, $url);curl_setopt($ch, CURLOPT_RETURNTRANSFER, 1);$output = curl_exec($ch);curl_close($ch);$message = json_decode($output,true);$result = "";if ($message['result'] == 100){$result = $message['response'];}else{$result = $message['result']."-".$message['msg'];}return $result;
}

define("TOKEN", "pondbay");$wechatObj = new wechatCallbackapiTest();
if (isset($_GET['echostr'])) {$wechatObj->valid();
}else{$wechatObj->responseMsg();
}class wechatCallbackapiTest
{public function valid(){$echoStr = $_GET["echostr"];if($this->checkSignature()){echo $echoStr;exit;}}private function checkSignature(){$signature = $_GET["signature"];$timestamp = $_GET["timestamp"];$nonce = $_GET["nonce"];$token = TOKEN;$tmpArr = array($token, $timestamp, $nonce);sort($tmpArr);$tmpStr = implode( $tmpArr );$tmpStr = sha1( $tmpStr );if( $tmpStr == $signature ){return true;}else{return false;}}public function responseMsg(){$postStr = $GLOBALS["HTTP_RAW_POST_DATA"];if (!empty($postStr)){$postObj = simplexml_load_string($postStr, 'SimpleXMLElement', LIBXML_NOCDATA);$RX_TYPE = trim($postObj->MsgType);switch ($RX_TYPE){case "text":$resultStr = $this->receiveText($postObj);break;case "event":$resultStr = $this->receiveEvent($postObj);break;}echo $resultStr;}else {echo "";exit;}}private function receiveText($object){$funcFlag = 0;$keyword = trim($object->Content);include('simsimi.php');$contentStr = callSimsimi($keyword);$resultStr = $this->transmitText($object, $contentStr, $funcFlag);return $resultStr;}private function receiveEvent($object){$contentStr = "";switch ($object->Event){case "subscribe":$contentStr = "欢迎关注方倍工作室\n小黄鸡为您服务！";}$resultStr = $this->transmitText($object, $contentStr);return $resultStr;}private function transmitText($object, $content, $flag = 0){$textTpl = "<xml>
<ToUserName><![CDATA[%s]]></ToUserName>
<FromUserName><![CDATA[%s]]></FromUserName>
<CreateTime>%s</CreateTime>
<MsgType><![CDATA[text]]></MsgType>
<Content><![CDATA[%s]]></Content>
<FuncFlag>%d</FuncFlag>
</xml>";$resultStr = sprintf($textTpl, $object->FromUserName, $object->ToUserName, time(), $content, $flag);return $resultStr;}
}