多图文消息推送

[乄耏的程序员]

$post_msg = '{
"touser":"'.$row['wxid'].'",
"msgtype":"news",
"news":{
"articles": [
{
"title":"'.$w_title.'",
"description":"'.$w_description.'",
"url":"'.$w_url.'",
"picurl":"'.$w_picurl.'"
},{
"title":"'.$w_title.'",
"description":"'.$w_description.'",
"url":"'.$w_url.'",
"picurl":"'.$w_picurl.'"
},{
"title":"'.$w_title.'",
"description":"'.$w_description.'",
"url":"'.$w_url.'",
"picurl":"'.$w_picurl.'"
},{
"title":"'.$w_title.'",
"description":"'.$w_description.'",
"url":"'.$w_url.'",
"picurl":"'.$w_picurl.'"
}
]
}
}';


为什么复制三次可以发三个的多图文

再多的话就不好使了呢，什么原因呢