微信企业号开发：简单实现自动回复

<?php

	include "../libs/weixin/WXBizMsgCrypt.php";
	
	// 参数设置
	$encodingAesKey = "2NakyiOvqqTIDW8GPUVnVxnCBO2mQIRsBQXuWsQWLCN";
	$token = "iuk83T8ejUzJLmADW6C4";
	$corpId = "请将这里修改为自己的企业corpID";

	$wxcpt = new WXBizMsgCrypt($token, $encodingAesKey, $corpId);

	// 获取URL参数
	$Xsignature = $_GET['msg_signature'];
	$Xtimestamp = $_GET['timestamp'];
	$Xnonce = $_GET['nonce'];

	// 获取用POST的消息 [获取到的消息为XML格式的密文]
	$userPostData = $GLOBALS["HTTP_RAW_POST_DATA"];

	// 明文用户消息 [解密后的明文XML格式]
	$userMessage = "";

	// 解析之后的明文
	$code = $wxcpt->DecryptMsg($Xsignature, $Xtimestamp, $Xnonce, $userPostData, $userMessage);

	// 判断解密结果
	if($code == 0) {
		$postStr = $userMessage;
		// 解析明文XML
		$userMessageObject = simplexml_load_string($postStr, 'SimpleXMLElement', LIBXML_NOCDATA);
		
		$toUserName = $userMessageObject->ToUserName;
		$fromUserName = $userMessageObject->FromUserName;
		$createTime = $userMessageObject->CreateTime;
		$msgType = $userMessageObject->MsgType;
		$content = trim($userMessageObject->Content);
		$msgId = $userMessageObject->MsgId;
		$agentID = $userMessageObject->AgentID;

		// 回复消息的XML模板
		$xmlTemplate = "<xml>
							<ToUserName><![CDATA[%s]]></ToUserName>
							<FromUserName><![CDATA[%s]]></FromUserName> 
							<CreateTime>%s</CreateTime>
							<MsgType><![CDATA[%s]]></MsgType>
							<Content><![CDATA[%s]]></Content>
						</xml>";

		// 设置回复数据的明文数据
		$toUser = $fromUserName;
		$fromUser = $toUserName;
		$text = "你好，欢迎来到企业号！西安格外科技欢迎你";
		$type = $msgType;
		$time = time();

		// 组装明文XML模板数据，等待加密
		$resultXML = sprintf($xmlTemplate, $toUser, $fromUser, $time, $type, $text);
		
		// 加密后的XML数据
		$responseData = "";

		// 通过微信加密库加密
		$code = $wxcpt->EncryptMsg($resultXML, $Xtimestamp, $Xnonce, $responseData);

		// 判断加密结果
		if($code == 0) {
			echo $responseData;
		} else {
			echo "Weixin EncryptMsg Error Code: " . $code;
		}
	} else {
		echo "Weixin DecryptMsg Error Code: " . $code;
	}
	

?>