php case语句 分号

http://www.php.net/manual/zh/control-structures.switch.php

文档上说：

允许使用分号代替 case 语句后的冒号，例如：

<?php
switch($beer)
{
    case 'tuborg';
    case 'carlsberg';
    case 'heineken';
        echo 'Good choice';
    break;
    default;
        echo 'Please make a new selection...';
    break;
}
?>

我还以为微信公众平台搭建与开发揭秘 书上的示例代码错了呢……留念：

<?php
/**
  * wechat php test
  */

//define your token
define("TOKEN", "weixin");
$wechatObj = new wechatCallbackapiTest();
//$wechatObj->valid();
$wechatObj->responseMsg();
class wechatCallbackapiTest
{
	public function valid()
    {
        $echoStr = $_GET["echostr"];

        //valid signature , option
        if($this->checkSignature()){
        	echo $echoStr;
        	exit;
        }
    }

    public function responseMsg()
    {
		//get post data, May be due to the different environments
		$postStr = $GLOBALS["HTTP_RAW_POST_DATA"];

      	//extract post data
		if (!empty($postStr)){
                
              	$postObj = simplexml_load_string($postStr, 'SimpleXMLElement', LIBXML_NOCDATA);
                $fromUsername = $postObj->FromUserName;
                $toUsername = $postObj->ToUserName;
				$type = $postObj->MsgType;
				$customevent = $postObj->Event;
				$latitude  = $postObj->Location_X;
				$longitude = $postObj->Location_Y;
                $keyword = trim($postObj->Content);
                $time = time();
                $textTpl = "<xml>
							<ToUserName><![CDATA[%s]]></ToUserName>
							<FromUserName><![CDATA[%s]]></FromUserName>
							<CreateTime>%s</CreateTime>
							<MsgType><![CDATA[%s]]></MsgType>
							<Content><![CDATA[%s]]></Content>
							<FuncFlag>0</FuncFlag>
							</xml>";             
				switch ($type)
			{   case "event";
				if ($customevent=="subscribe")
				    {$contentStr = "感谢你的关注\n回复1查看联系方式\n回复2查看最新资讯\n回复3查看法律文书";}
				break;
				case "image";
				$contentStr = "你的图片很棒！";
				break;
				case "location";
				$contentStr = "你的纬度是{$latitude},经度是{$longitude},我已经锁定！";
				break;
				case "link" ;
				$contentStr = "你的链接有病毒吧！";
				break;
				case "text";
				  switch($keyword)
				  {
                    case "1";              					
					$contentStr = "联系方式：汕头市金平区华乾大厦703,1341702551，			email：[email protected]";
					break;
					case "2";
                	$contentStr = "最新资讯：《汕头市环境违法行为举报奖励办法》将于8月1日实施。";
					break;
					case "3";
                	$contentStr = "31离婚协议\n32租房合同\n33协议书";
					break;
					default;
					$contentStr ="hi";
				 }
				 break;					
			default;
			$contentStr ="此项功能尚未开发";	
			}
				$msgType="text";
				$resultStr = sprintf($textTpl, $fromUsername, $toUsername, $time, $msgType, $contentStr);
                echo $resultStr;
                

        }else {
        	echo "";
        	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;
		}
	}
}

?>

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