接口异常是什么意思？

include_once "WXBizMsgCryptphp";
// 第三方发送消息给公众平台
$encodingAesKey = "rpJmhCphnndiCLIcNKcUmhTn2GQBNjISPU9GfsfOlxx";
$token = "xxxxxxx";
$corpId ="wxa9a0031f24631f9x"; //这里已正确填写自己的corpid
//公众号服务器数据
$sReqMsgSig = $sVerifyMsgSig = $_GET['msg_signature'];
$sReqTimeStamp = $sVerifyTimeStamp = $_GET['timestamp'];
$sReqNonce = $sVerifyNonce = $_GET['nonce'];
$sReqData = file_get_contents("php://input");;
$sVerifyEchoStr = $_GET['echostr'];
$wxcpt = new WXBizMsgCrypt($token, $encodingAesKey, $corpId);
if($sVerifyEchoStr){
$sEchoStr = "";
$errCode = $wxcpt->VerifyURL($sVerifyMsgSig, $sVerifyTimeStamp, $sVerifyNonce, $sVerifyEchoStr, $sEchoStr);
if ($errCode == 0) {
print($sEchoStr);
} else {
print($errCode "\n\n");
}
exit;
}
//decrypt
$sMsg = ""; //解析之后的明文
$errCode = $wxcpt->DecryptMsg($sReqMsgSig, $sReqTimeStamp, $sReqNonce, $sReqData, $sMsg);
if ($errCode == 0) {
$xml = new DOMDocument();
$xml->loadXML($sMsg);
$reqToUserName = $xml->getElementsByTagName('ToUserName')->item(0)->nodeValue;
$reqFromUserName = $xml->getElementsByTagName('FromUserName')->item(0)->nodeValue;
$reqCreateTime = $xml->getElementsByTagName('CreateTime')->item(0)->nodeValue;
$reqMsgType = $xml->getElementsByTagName('MsgType')->item(0)->nodeValue;
$reqContent = $xml->getElementsByTagName('Content')->item(0)->nodeValue;
$reqMsgId = $xml->getElementsByTagName('MsgId')->item(0)->nodeValue;
$reqAgentID = $xml->getElementsByTagName('AgentID')->item(0)->nodeValue;
switch($reqContent){
case "马云":
$mycontent="您好，马云！我知道您创建了阿里巴巴！";
break;
case "马化腾":
$mycontent="您好，马化腾！我知道创建了企鹅帝国！";
break;
case "史玉柱":
$mycontent="您好，史玉柱！我知道您创建了巨人网络！";
break;
default :
$mycontent="你是谁啊？！一边凉快去！";
break;
}
$sRespData =
"<xml>
<ToUserName><![CDATA["$reqFromUserName"]]></ToUserName>
<FromUserName><![CDATA["$corpId"]]></FromUserName>
<CreateTime>"sReqTimeStamp"</CreateTime>
<MsgType><![CDATA[text]]></MsgType>
<Content><![CDATA["$mycontent"]]></Content>
</xml>";
$sEncryptMsg = ""; //xml格式的密文
$errCode = $wxcpt->EncryptMsg($sRespData, $sReqTimeStamp, $sReqNonce, $sEncryptMsg);
if ($errCode == 0) {
//file_put_contents('smg_responsetxt', $sEncryptMsg); //debug:查看smg
print($sEncryptMsg);
} else {
print($errCode "\n\n");
}
} else {
print($errCode "\n\n");
}
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WXBizMsgCryptphp 文件请点击下面地址下载 ：
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