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POParse a xml attribute depending on child content
 

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    <p>I load an external xml file containing user metas looking like this:</p> <pre><code>&lt;?xml version="1.0" encoding="utf-8"?&gt; &lt;user_information&gt; &lt;user url="http://usersweb.com"&gt; &lt;name&gt;Arnold&lt;/name&gt; &lt;lastname&gt; &lt;name&gt;Arnoldson&lt;/name&gt; &lt;/lastname&gt; &lt;age&gt;42&lt;/age&gt; &lt;/user&gt; &lt;user url="http://anotheruserweb.com"&gt; &lt;name&gt;Arnold&lt;/name&gt; &lt;lastname&gt; &lt;name&gt;Arichson&lt;/name&gt; &lt;/lastname&gt; &lt;age&gt;42&lt;/age&gt; &lt;/user&gt; And so on.... &lt;/user_information&gt; </code></pre> <p>I know the formatting with</p> <pre><code>&lt;lastname&gt; </code></pre> <p>is really stupid, but i can't modify the source.</p> <p>I want to load in the "url"-attribute from </p> <pre><code>&lt;user&gt; </code></pre> <p>, but only if </p> <pre><code>&lt;name&gt; </code></pre> <p>and </p> <pre><code>&lt;lastname&gt; </code></pre> <p>matches the name values i have stored in my own user database.</p> <p>I know how to parse the rest of it with PHP, but just the matching sequence seems difficult to me. Any help appreciated!</p> <hr> <p><strong>EDIT:</strong> Since i can not give you the source XML, i found a similar code structure in the Spotify Metadata API. We can laborate with the returning XML-file from the track search "Domino Dancing": <a href="http://ws.spotify.com/search/1/track?q=Domino%20Dancing" rel="nofollow" title="Spotify Metadata API">ws.spotify.com/search/1/track?q=Domino Dancing</a></p> <p>It has the exactly same structur, excepts it use other words. The returning file looks like this:</p> <pre><code>&lt;?xml version="1.0" encoding="utf-8"?&gt; &lt;tracks xmlns:opensearch="http://a9.com/-/spec/opensearch/1.1/" xmlns="http://www.spotify.com/ns/music/1"&gt; &lt;opensearch:Query role="request" startPage="1" searchTerms="Domino Dancing"/&gt; &lt;opensearch:totalResults&gt;39&lt;/opensearch:totalResults&gt; &lt;opensearch:startIndex&gt;0&lt;/opensearch:startIndex&gt; &lt;opensearch:itemsPerPage&gt;100&lt;/opensearch:itemsPerPage&gt; &lt;track href="spotify:track:2aV5vCNH5tOOe0GGKqfx5Z"&gt; &lt;name&gt;Domino dancing&lt;/name&gt; &lt;artist href="spotify:artist:2ycnb8Er79LoH2AsR5ldjh"&gt; &lt;name&gt;Pet Shop Boys&lt;/name&gt; &lt;/artist&gt; &lt;id type="isrc"&gt;GBAYE0301704&lt;/id&gt; &lt;album href="spotify:album:0BAfuhzkGjckMhsL2gVbzR"&gt; &lt;name&gt;Ultimate&lt;/name&gt; &lt;released&gt;2010&lt;/released&gt; &lt;availability&gt; &lt;territories&gt;AT BE CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IT LT LU NL NO PL PT RO SE SI SK&lt;/territories&gt; &lt;/availability&gt; &lt;/album&gt; &lt;track-number&gt;7&lt;/track-number&gt; &lt;length&gt;258.106000&lt;/length&gt; &lt;popularity&gt;0.57092&lt;/popularity&gt; &lt;/track&gt; &lt;track href="spotify:track:4mVLzFbc3gaCoWCEENLouc"&gt; &lt;name&gt;Domino Dancing&lt;/name&gt; &lt;artist href="spotify:artist:2ycnb8Er79LoH2AsR5ldjh"&gt; &lt;name&gt;Pet Shop Boys&lt;/name&gt; &lt;/artist&gt; &lt;id type="isrc"&gt;GBAYE8800056&lt;/id&gt; &lt;album href="spotify:album:0Jt2LzWgtGxy3GZH5i2Kcy"&gt; &lt;name&gt;Discography - Complete Singles Collection&lt;/name&gt; &lt;released&gt;1991&lt;/released&gt; &lt;availability&gt; &lt;territories&gt;AT BE CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IT LT LU NL NO PL PT RO SE SI SK&lt;/territories&gt; &lt;/availability&gt; &lt;/album&gt; &lt;track-number&gt;10&lt;/track-number&gt; &lt;length&gt;258.333000&lt;/length&gt; &lt;popularity&gt;0.56159&lt;/popularity&gt; &lt;/track&gt; &lt;track href="spotify:track:72kgJ1brMxxeDiPNdH6qqW"&gt; &lt;name&gt;Viva la vida/Domino dancing&lt;/name&gt; &lt;artist href="spotify:artist:2ycnb8Er79LoH2AsR5ldjh"&gt; &lt;name&gt;Pet Shop Boys&lt;/name&gt; &lt;/artist&gt; &lt;id type="isrc"&gt;GBCEW0900049&lt;/id&gt; &lt;album href="spotify:album:4DZfMTDyBwnJQ0k1PaT6U4"&gt; &lt;name&gt;Pet Shop Boys Christmas&lt;/name&gt; &lt;released&gt;2009&lt;/released&gt; &lt;availability&gt; &lt;territories&gt;AT BE CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IT LT LU NL NO PL PT RO SE SI SK&lt;/territories&gt; &lt;/availability&gt; &lt;/album&gt; &lt;track-number&gt;4&lt;/track-number&gt; &lt;length&gt;333.507000&lt;/length&gt; &lt;popularity&gt;0.51961&lt;/popularity&gt; &lt;/track&gt; &lt;/tracks&gt; </code></pre> <p>If we pretend that user_information=tracks user=track url=href lastname=artist.</p> <p>Hope this helps!</p> <p><strong>EDIT2:</strong> I solved it using Xpath Document and namespaces. Thank you all for trying!</p>
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