php - xml中具有相同名称的多个节点

Question

我在下面有这个 xml 文件:-

 <item> 
  <title>Troggs singer Reg Presley dies at 71</title>  
  <description>Reg Presley, the lead singer of British rock band The Troggs, whose hits in the 1960s included Wild Thing, has died aged 71.</description>  
  <link>http://www.bbc.co.uk/news/uk-21332048#sa-ns_mchannel=rss&amp;ns_source=PublicRSS20-sa</link>  
  <guid isPermaLink="false">http://www.bbc.co.uk/news/uk-21332048</guid>  
  <pubDate>Tue, 05 Feb 2013 01:13:07 GMT</pubDate>  
  <media:thumbnail width="66" height="49" url="http://news.bbcimg.co.uk/media/images/65701000/jpg/_65701366_65701359.jpg"/>  
  <media:thumbnail width="144" height="81" url="http://news.bbcimg.co.uk/media/images/65701000/jpg/_65701387_65701359.jpg"/> 
</item>  
<item> 
  <title>Horsemeat found at Newry cold store</title>  
  <description>Horse DNA has been found in frozen meat in a cold store in Northern Ireland, as Irish police investigate a third case of contamination.</description>  
  <link>http://www.bbc.co.uk/news/world-europe-21331208#sa-ns_mchannel=rss&amp;ns_source=PublicRSS20-sa</link>  
  <guid isPermaLink="false">http://www.bbc.co.uk/news/world-europe-21331208</guid>  
  <pubDate>Mon, 04 Feb 2013 23:47:38 GMT</pubDate>  
  <media:thumbnail width="66" height="49" url="http://news.bbcimg.co.uk/media/images/65700000/jpg/_65700000_002950295-1.jpg"/>  
  <media:thumbnail width="144" height="81" url="http://news.bbcimg.co.uk/media/images/65700000/jpg/_65700001_002950295-1.jpg"/> 
</item>  
<item> 
  <title>US 'will sue' Standard &amp; Poor's</title>  
  <description>Standard &amp; Poor's says it is to be sued by the US government over the credit ratings agency's assessment of mortgage bonds before the financial crisis.</description>  
  <link>http://www.bbc.co.uk/news/21331018#sa-ns_mchannel=rss&amp;ns_source=PublicRSS20-sa</link>  
  <guid isPermaLink="false">http://www.bbc.co.uk/news/21331018</guid>  
  <pubDate>Mon, 04 Feb 2013 22:45:52 GMT</pubDate>  
  <media:thumbnail width="66" height="49" url="http://news.bbcimg.co.uk/media/images/65701000/jpg/_65701717_mediaitem65699884.jpg"/>  
  <media:thumbnail width="144" height="81" url="http://news.bbcimg.co.uk/media/images/65701000/jpg/_65701718_mediaitem65699884.jpg"/> 
   </item>  

现在，当我将输入节点作为“项目”来检索数据时，而不是显示所有项目节点，它只显示最后一个项目节点......

我的代码是:-

    $dom->load($url);
    $link = $dom->getElementsByTagName($tag_name);
    $value = array();

    for ($i = 0; $i < $link->length; $i++) {
        $childnode['name'] = $link->item($i)->nodeName;
        $childnode['value'] = $link->item($i)->nodeValue;
        $value[$childnode['name']] = $childnode['value'];
    }

这里，$url是我的xml页面的url$tag_name 是节点的名称，在本例中是“item”

我得到的输出是:-

  US 'will sue' Standard & Poor's.Standard & Poor's says it is to be sued by the US government over the credit ratings agency's assessment of mortgage bonds before the financial crisis.http://www.bbc.co.uk/news/21331018#sa-ns_mchannel=rss&ns_source=PublicRSS20-sa.http://www.bbc.co.uk/news/world-europe-21331208.Mon, 04 Feb 2013 22:45:52 GMT

这是最后一个标签的数据。我想要所有项目标签的数据，而且我希望数据采用这种格式:-

title :-  US 'will sue' Standard & Poor's
description :- Standard & Poor's says it is to be sued by the US government over 
the credit ratings agency's assessment of mortgage bonds before the financial crisis

我什至想在我的输出中包含子节点的名称(如果有的话)...请帮帮我....

Answer 1

您似乎只在“项目”节点上循环，并且正如其他人提到的那样，在每次迭代时都会覆盖先前的值。

如果您使用 print_r($value) inside 循环调试 $value 数组；

$dom->load($url);
$link = $dom->getElementsByTagName($tag_name);
$value = array();

for ($i = 0; $i < $link->length; $i++) {
    $childnode['name'] = $link->item($i)->nodeName;
    $childnode['value'] = $link->item($i)->nodeValue;
    $value[$childnode['name']] = $childnode['value'];

    echo 'iteration: ' . $i . '<br />';
    echo '<pre>'; print_r($value); echo '</pre>';
}

你可能会看到这样的东西

// iteration: 0
Array
(
    [item] => Troggs singer Reg Presley dies at 71 ......
)

// iteration: 1
Array
(
    [item] => Horsemeat found at Newry cold store .........
)

// iteration: 2
Array
(
    [item] => US 'will sue' Standard & Poor's .........
)

你应该做的是:

$dom = new DOMDocument();
$dom->preserveWhiteSpace = false;
$dom->load($url);
$items = $dom->getElementsByTagName($tag_name);
$values = array();

foreach ($items as $item) {
    $itemProperties = array();

    // Loop through the 'sub' items 
    foreach ($item->childNodes as $child) {
        // Note: using 'localName' to remove the namespace
        if (isset($itemProperties[(string) $child->localName])) {
            // Quickfix to support multiple 'thumbnails' per item (although they have no content)
            $itemProperties[$child->localName] = (array) $itemProperties[$child->localName];
            $itemProperties[$child->localName][] = $child->nodeValue;
        } else {
            $itemProperties[$child->localName] = $child->nodeValue;
        }
    }

    // Append the item to the 'values' array
    $values[] = $itemProperties;

}


// Output the result
echo '<pre>'; print_r($values); echo '</pre>';

哪些输出:

Array
(
    [0] => Array
        (
            [title] => Troggs singer Reg Presley dies at 71
            [description] => Reg Presley, the lead singer of British rock band The Troggs, whose hits in the 1960s included Wild Thing, has died aged 71.
            [link] => http://www.bbc.co.uk/news/uk-21332048#sa-ns_mchannel=rss&ns_source=PublicRSS20-sa
            [guid] => http://www.bbc.co.uk/news/uk-21332048
            [pubDate] => Tue, 05 Feb 2013 01:13:07 GMT
            [thumbnail] => Array
                (
                    [0] => 
                    [1] => 
                )

        )

    [1] => Array
        (
            [title] => Horsemeat found at Newry cold store
            [description] => Horse DNA has been found in frozen meat in a cold store in Northern Ireland, as Irish police investigate a third case of contamination.
            [link] => http://www.bbc.co.uk/news/world-europe-21331208#sa-ns_mchannel=rss&ns_source=PublicRSS20-sa
            [guid] => http://www.bbc.co.uk/news/world-europe-21331208
            [pubDate] => Mon, 04 Feb 2013 23:47:38 GMT
            [thumbnail] => Array
                (
                    [0] => 
                    [1] => 
                )

        )

    [2] => Array
        (
            [title] => US 'will sue' Standard & Poor's
            [description] => Standard & Poor's says it is to be sued by the US government over the credit ratings agency's assessment of mortgage bonds before the financial crisis.
            [link] => http://www.bbc.co.uk/news/21331018#sa-ns_mchannel=rss&ns_source=PublicRSS20-sa
            [guid] => http://www.bbc.co.uk/news/21331018
            [pubDate] => Mon, 04 Feb 2013 22:45:52 GMT
            [thumbnail] => Array
                (
                    [0] => 
                    [1] => 
                )

        )

)