$xmlTpl = "<xml>
            <ToUserName><![CDATA[%s]]></ToUserName>
            <FromUserName><![CDATA[%s]]></FromUserName>
            <CreateTime>%s</CreateTime>
            <MsgType><![CDATA[text]]></MsgType>
            <Content><![CDATA[%s]]></Content>
            </xml>";
$keyword = isset ( $param ['Content'] ) ? trim ( $param ['Content'] ) : '';
if(isset($param ['Event']) && $param ['ToUserName'] == 'gh_3c884a361561'){ // 案例1
	$contentStr = $param ['Event'] . 'from_callback';
}elseif ($keyword == "TESTCOMPONENT_MSG_TYPE_TEXT") { // 案例2
	$contentStr = "TESTCOMPONENT_MSG_TYPE_TEXT_callback";
} elseif (strpos ( $keyword, "QUERY_AUTH_CODE:" ) !== false) { // 案例3
	$ticket = str_replace ( "QUERY_AUTH_CODE:", "", $keyword );
	$contentStr = $ticket . "_from_api";
	$tokenInfo = WechatOpenApiLogic::getAuthorizerAccessTokenByAuthCode ( $ticket );
	$param ['authorizerAccessToken'] = $tokenInfo ['authorization_info'] ['authorizer_access_token'];
	self::sendServiceMsg ( $param ['FromUserName'], $param ['ToUserName'], 1, $contentStr ); // 客服訊息介面
	return 1;
}
$result = '';
if (! empty ( $contentStr )) {
	$result = sprintf ( $xmlTpl, $param ['FromUserName'], $param ['ToUserName'], time (), $contentStr );
	if (isset ( $_GET ['encrypt_type'] ) && $_GET ['encrypt_type'] == 'aes') { // 密文傳輸
		$msgCryptObj = new WXBizMsgCrypt ( OPEN_MSG_VERIFY_TOKEN, OPEN_ENCRYPT_KEY, OPEN_APPID );
		$encryptMsg = '';
		$msgCryptObj->encryptMsg ( $result, $_GET ['timestamp'], $_GET ['nonce'], $encryptMsg );
		$result = $encryptMsg;
	}
}