使用PHP解析XML
我一直在用PHP解析XML时遇到了一个问题,而且没有真正找到“正确的方式”或者至少是解析XML文件的标准方式。使用PHP解析XML
首先我试图分析此:
<item>
<title>2884400</title>
<description><![CDATA[ ><img width="126" alt="" src="http://userserve-ak.last.fm/serve/126/27319921.jpg" /> ]]></description>
<link>http://www.last.fm/music/+noredirect/Beatles/+images/27319921</link>
<author>anne710</author>
<pubDate>Tue, 21 Apr 2009 16:12:31 +0000</pubDate>
<guid>http://www.last.fm/music/+noredirect/Beatles/+images/27319921</guid>
<media:content url="http://userserve-ak.last.fm/serve/_/27319921/Beatles+2884400.jpg" fileSize="13065" type="image/jpeg" expression="full" width="126" height="126" />
<media:thumbnail url="http://userserve-ak.last.fm/serve/126/27319921.jpg" type="image/jpeg" width="126" height="126" />
</item>
我使用这个代码:
$doc = new DOMDocument();
$doc->load('http://ws.audioscrobbler.com/2.0/artist/beatles/images.rss');
$arrFeeds = array();
foreach ($doc->getElementsByTagName('item') as $node) {
$itemRSS = array (
'title' => $node->getElementsByTagName('title')->item(0)->nodeValue,
'desc' => $node->getElementsByTagName('description')->item(0)->nodeValue,
'link' => $node->getElementsByTagName('link')->item(0)->nodeValue,
'date' => $node->getElementsByTagName('pubDate')->item(0)->nodeValue
);
array_push($arrFeeds, $itemRSS);
}
现在我想要得到的“媒体:内容”和“媒体:缩略图“网址属性,我会怎么做?现在我想我应该使用DOMElement :: getAttribute,但是我没有设法使它工作:/任何人都可以对此有所了解,并且让我知道这是否是解析XML的好方法?
问候, 沙迪
这是如何我一直在使用的XMLReader最终做到了:
<?php
define ('XMLFILE', 'http://ws.audioscrobbler.com/2.0/artist/vasco%20rossi/images.rss');
echo "<pre>";
$items = array();
$i = 0;
$xmlReader = new XMLReader();
$xmlReader->open(XMLFILE, null, LIBXML_NOBLANKS);
$isParserActive = false;
$simpleNodeTypes = array ("title", "description", "media:title", "link", "author", "pubDate", "guid");
while ($xmlReader->read())
{
$nodeType = $xmlReader->nodeType;
// Only deal with Beginning/Ending Tags
if ($nodeType != XMLReader::ELEMENT && $nodeType != XMLReader::END_ELEMENT) { continue; }
else if ($xmlReader->name == "item") {
if (($nodeType == XMLReader::END_ELEMENT) && $isParserActive) { $i++; }
$isParserActive = ($nodeType != XMLReader::END_ELEMENT);
}
if (!$isParserActive || $nodeType == XMLReader::END_ELEMENT) { continue; }
$name = $xmlReader->name;
if (in_array ($name, $simpleNodeTypes)) {
// Skip to the text node
$xmlReader->read();
$items[$i][$name] = $xmlReader->value;
} else if ($name == "media:thumbnail") {
$items[$i]['media:thumbnail'] = array (
"url" => $xmlReader->getAttribute("url"),
"width" => $xmlReader->getAttribute("width"),
"height" => $xmlReader->getAttribute("height"),
"type" => $xmlReader->getAttribute("type")
);
} else if ($name == "media:content") {
$items[$i]['media:content'] = array (
"url" => $xmlReader->getAttribute("url"),
"width" => $xmlReader->getAttribute("width"),
"height" => $xmlReader->getAttribute("height"),
"filesize" => $xmlReader->getAttribute("fileSize"),
"expression" => $xmlReader->getAttribute("expression")
);
}
}
print_r($items);
echo "</pre>";
?>
你会想是这样的:
'content' => $node->getElementsByTagNameNS('http://search.yahoo.com/mrss/', 'content')->item(0)->getAttribute('url');
'thumbnail' => $node->getElementsByTagNameNS('http://search.yahoo.com/mrss/', 'thumbnail')->item(0)->getAttribute('url');
我相信会的工作,它已经有一段时间,因为我做了这样的事。
这是不是工作? – 2009-07-13 21:13:55
[Mon Jul 13 23:13:04 2009] [error] [client xxx.xxx.xxx.xxx] PHP致命错误:在/ v2中的非对象上调用成员函数getAttribute()。73行上的php – 2009-07-13 21:21:34
<?php
#Convert the String Into XML
$xml = new SimpleXMLElement($_POST['name']);
#Itterate through the XML for the data
$values = "VALUES('' , ";
foreach($xml->item as $item)
{
//you now have access to that aitem
}
?>
可以使用SimpleXML通过其他海报的建议,但你需要使用儿童()和属性()函数,所以你可以deal with the different namespaces
例(未经测试):
$feed = file_get_contents('http://ws.audioscrobbler.com/2.0/artist/beatles/images.rss');
$xml = new SimpleXMLElement($feed);
foreach ($xml->channel->item as $item) {
foreach ($item->children('http://search.yahoo.com/mrss' as $media_element) {
var_dump($media_element);
}
}
或者,您可以使用XPath(再次,未经测试):
$feed = file_get_contents('http://ws.audioscrobbler.com/2.0/artist/beatles/images.rss');
$xml = new SimpleXMLElement($feed);
$xml->registerXPathNamespace('media', 'http://ws.audioscrobbler.com/2.0/artist/beatles/images.rss');
$images = $xml->xpath('/rss/channel/item/media:[email protected]');
var_dump($images);
试试这个。它会正常工作。
$doc = new DOMDocument();
$doc->load('http://ws.audioscrobbler.com/2.0/artist/beatles/images.rss');
$arrFeeds = array();
foreach ($doc->getElementsByTagName('item') as $node) {
$itemRSS = array (
'title' => $node->getElementsByTagName('title')->item(0)->nodeValue,
'desc' => $node->getElementsByTagName('description')->item(0)->nodeValue,
'link' => $node->getElementsByTagName('link')->item(0)->nodeValue,
'date' => $node->getElementsByTagName('pubDate')->item(0)->nodeValue,
'thumbnail' => $node->getElementsByTagName('thumbnail')->item(0)->getAttribute('url')
);
array_push($arrFeeds, $itemRSS);
}
如果饲料中缺少像thumbnail
条目您可能会收到错误Call to a member function getAttribute() on a non-object
,因此,虽然我很喜欢@Helder罗巴洛的答案,你应该检查,以确保节点试图用之类的东西getAttribute()
之前就存在:
<?php
header('Content-type: text/plain; charset=utf-8');
$doc = new DOMDocument();
$doc->load('http://ws.audioscrobbler.com/2.0/artist/beatles/images.rss');
$arrFeeds = array();
foreach ($doc->getElementsByTagName('item') as $node) {
$itemRSS = array (
'title' => $node->getElementsByTagName('title')->item(0)->nodeValue,
'desc' => $node->getElementsByTagName('description')->item(0)->nodeValue,
'link' => $node->getElementsByTagName('link')->item(0)->nodeValue,
'date' => $node->getElementsByTagName('pubDate')->item(0)->nodeValue
);
if(sizeof($node->getElementsByTagName('thumbnail')->item(0)) > 0)
{
$itemRSS['thumbnail'] = $node->getElementsByTagName('thumbnail')->item(0)->getAttribute('url');
}
else
{
$itemRSS['thumbnail'] = '';
}
array_push($arrFeeds, $itemRSS);
}
print_r($arrFeeds);
媒体:内容属性实际上是非常容易得到与简单的XML
if([email protected]$x=simplexml_load_file($feed_url)){
}
else
{
foreach($x->channel->item as $entry)
{
$media = $entry->children('http://search.yahoo.com/mrss/')->attributes();
$url = (string) $media['url'];
}
}
这整个问题/线程是非常糟糕的。问题是缺乏对名字空间的理解。我建议任何人阅读这篇文章了解XML名称空间。人们在下面提到了这一点。问题在于media:内容意味着属于'media'命名空间的'content'标记,而不是默认的命名空间(这就是你要查询的内容)。 – Jotham 2010-02-11 02:04:18