微信多图文foreach验证失败，求找茬！头要炸了！

Question

请问这段代码哪里有错？$newsArr = array(          array("Title"=>"this is first item",             "Description"=>"this is first item description",             "PicUrl"=>"http://img4.imgtn.bdimg.com/it/u=2943793272,3641314298&fm=21&gp=0.jpg",             "Url"=>"http://www.baidu.com"          ),          array("Title"=>"this is second item",              "Description"=>"this is second item description",              "PicUrl"=>"http://img2.imgtn.bdimg.com/it/u=945726929,542696667&fm=21&gp=0.jpg",              "Url"=>"http://www.baidu.com"          ),          array("Title"=>"this is thired",             "Description"=>"this is thired",             "PicUrl"=>"http://img1.imgtn.bdimg.com/it/u=2783016379,35786742&fm=21&gp=0.jpg",             "Url"=>"http://www.baidu.com"          ) ); foreach ($newsArr as $key => $value) {    $itemstr .= "          <item>          <Title><![CDATA[".$value['Title']."]]></Title>          <Description><![CDATA[".$value['Description']."]]></Description>          <PicUrl><![CDATA[".$value['PicUrl']."]]></PicUrl>          <Url><![CDATA[".$value['Url']."]]></Url>          <item>"; }    $result = "<xml>          <ToUserName><![CDATA[%s]]></ToUserName>          <FromUserName><![CDATA[%s]]></FromUserName>          <CreateTime>%s</CreateTime>          <MsgType><![CDATA[news]]></MsgType>          <ArticleCount>".count($newsArr)."</ArticleCount>          <Articles>".$itemstr."</Articles>          </xml>";    $newsInfo = sprintf($result, $fromUser , $toUser , time());    echo $newsInfo;

Answer 1

$itemstr只在foreach中有作用，应该在foreach上面定义：$itemstr = "";