php simplexml根据字段的值获取特定项
it1352
帮助1人
问题说明
有没有办法我可以使用SimpleXML获得特定项目?
Is there a way i can get a specific item with SimpleXML ?
例如，我想使用此示例xml获取ID设置为12437的项目的标题:
For example, i would like to get the title of an item having ID set to 12437 with this example xml :
<items>
<item>
<title>blah blah 43534</title>
<id>43534</id>
</item>
<item>
<title>blah blah 12437</title>
<id>12437</id>
</item>
<item>
<title>blah blah 7868</title>
<id>7868</id>
</item>
</items>
正确答案
#1
这里有2种简单的方式来做您想要的事情，一种是像这样对每个项目进行迭代:
Here are 2 simple ways of doing what you want, one is iterating with each item like this:
<?php
$str = <<<XML
<items>
<item>
<title>blah blah 43534</title>
<id>43534</id>
</item>
<item>
<title>blah blah 12437</title>
<id>12437</id>
</item>
<item>
<title>blah blah 7868</title>
<id>7868</id>
</item>
</items>
XML;
$data = new SimpleXMLElement($str);
foreach ($data->item as $item)
{
if ($item->id == 12437)
{
echo "ID: " . $item->id . "\n";
echo "Title: " . $item->title . "\n";
}
}
Live DEMO.
另一种方法是使用XPath来精确定位所需的数据，如下所示:
The other would be using an XPath, to pin point the exact data you want like this:
<?php
$str = <<<XML
<items>
<item>
<title>blah blah 43534</title>
<id>43534</id>
</item>
<item>
<title>blah blah 12437</title>
<id>12437</id>
</item>
<item>
<title>blah blah 7868</title>
<id>7868</id>
</item>
</items>
XML;
$data = new SimpleXMLElement($str);
// Here we find the element id = 12437 and get it's parent
$nodes = $data->xpath('//items/item/id[.="12437"]/parent::*');
$result = $nodes[0];
echo "ID: " . $result->id . "\n";
echo "Title: " . $result->title . "\n";
Live DEMO.
这篇好文章是转载于：学新通技术网
