php xpath基于多个属性和父属性检索属性值

Question

I need to select nodes from xml, conditions see below. I am using simplexml, so the xpath has to be 1.0.

XML snippet:

<scales>
    <scale id="1" gender="*" age="*">
        <d scid="hi" raw="10" t="76" />
        <d scid="pn" raw="12" t="80" />
    </scale>
    <scale id="2" gender="m" age="*">
        <d scid="hi" raw="8" t="79" />
        <d scid="pn" raw="2" t="50" />
    </scale>
    <scale id="3" gender="*" age="19-39">
        <d scid="hi" raw="0" t="48" />
        <d scid="pn" raw="10" t="49" />
    </scale>
</scales>

Now, I want to select the t-Attribute of a <d> node that has...

 raw="10" AND scid="hi"

 $result=$xml->xpath('//d[@scid="hi"][@raw="10"]/@t');

And its parent-node <scale> has...

(gender="*" OR gender="m") AND (age="*" OR age="39-59")

$result=$xml->xpath('//scale[@gender="*" or @gender="m"][@age="*" or @age="39-59"]');

I'd like to get this with 1 xpath-statement from my simplexml-object $xml.

Answer 1

Just combine your two XPath query...

Live demo

$str=<<<XML
<scales>
    <scale id="1" gender="*" age="*">
        <d scid="hi" raw="10" t="76" />
        <d scid="pn" raw="12" t="80" />
    </scale>
    <scale id="2" gender="m" age="*">
        <d scid="hi" raw="8" t="79" />
        <d scid="pn" raw="2" t="50" />
    </scale>
    <scale id="3" gender="*" age="19-39">
        <d scid="hi" raw="0" t="48" />
        <d scid="pn" raw="10" t="49" />
    </scale>
</scales>
XML;
$xml=simplexml_load_string($str);
foreach($xml->xpath('//scale[@gender="*" or @gender="m"][@age="*" or @age="39-59"]/d[@scid="hi"][@raw="10"]/@t') as $t)
{
    echo $t;
}

Outputs 76.