douchuang4181 2010-01-25 02:21
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使用simplexml按属性获取节点(及其子节点)

Using simplexml, is it possible to get the children of a node based on the parent's attributes. For example, I want to get a list of the variants in myItem1 (output would be small, large)

Here is some psuedo code of what I'm after:

foreach($xml->xpath('//family[@name="myItem1"]')->variants->children() as $child) {
    $child->getName()
}

(Of course this doesn't work, but hopefully it describes what I'm trying to do.)

Sample XML:

<library>
 <family name="myItem1">
   <variants>
    <small>
     ...
    </small>
    <large>
     ...
    </large>    
   </variants>
 </family>
 <family name="myItem2">
   <variants>
    <small>
     ...
    </small>
    <medium>
     ...
    </medium>   
   </variants>
 </family>
</library>

Thank you.

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  • dongling2545 2010-01-25 03:28
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    If I understand correctly, you want to get the names of all the children of a given node. There are various way to do it, one of them is to iterate over all the children, like this:

    foreach ($xml->xpath('//family[@name="myItem1"]') as $family)
    {
        $variants = array();
        foreach ($family->variants->children() as $name => $node)
        {
            $variants[] = $name;
        }
    
        // in case there are duplicates you can do
        $variants = array_unique($variants);
    
        var_dump($variants);
    }
    
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