使用SimpleXML获取XML属性 [英] Get XML Attribute with SimpleXML

问题描述

我正在尝试获取$xml->entry->yt:statistics->attributes()->viewCount属性，并且我已经使用SimpleXML进行了一些尝试，但是我真的无法使其正常工作！

I'm trying to get the $xml->entry->yt:statistics->attributes()->viewCount attribute, and I've tried some stuff with SimpleXML, and I can't really get it working!

尝试#1

<?php
$xml = simplexml_load_file("http://gdata.youtube.com/feeds/api/videos?author=Google");
echo $xml->entry[0]->yt:statistics['viewCount'];
?>

尝试#2

<?php
$xml = simplexml_load_file("http://gdata.youtube.com/feeds/api/videos?author=Google");
echo $xml->entry[0]->yt:statistics->attributes()->viewCount;
?>

尽管SimpleXML可以正常工作，但两者都返回空白，我试图获取供稿的标题，有效了！

Both of which return blank, though SimpleXML is working, I tried to get the feed's title, which worked!

有什么想法吗?

我已经查看了SO和其他站点上其他示例的负载，但是以某种方式行不通吗? PHP会识别':'是断言，还是我只是在做一些愚蠢的事情?

I've looked at loads of other examples on SO and other sites, but somehow this isn't working? does PHP recognize the ':' to be a cut-off, or am I just doing something stupid?

谢谢您，任何回复都非常感谢！

Thank you, any responses greatly appreciated!

推荐答案

如果您只想获取youtube视频的观看次数，则必须指定视频ID.在每个视频网址中都可以找到youtube ID.例如"http://www.youtube.com/watch?v=ccI-MugndOU"，因此ID为ccI-MugndOU.为了获得观看次数，请尝试下面的代码

If you just want to get the viewcount of a youtube video then you have to specify the video ID. The youtube ID is found in each video url. For example "http://www.youtube.com/watch?v=ccI-MugndOU" so the id is ccI-MugndOU. In order to get the viewcount then try the code below

$sample_video_ID = "ccI-MugndOU";
$JSON = file_get_contents("http://gdata.youtube.com/feeds/api/videos?q={$sample_video_ID}&alt=json");
$JSON_Data = json_decode($JSON);
$views = $JSON_Data->{'feed'}->{'entry'}[0]->{'yt$statistics'}->{'viewCount'};
    echo $views;

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