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    copied!<p>You can use <a href="http://www.w3.org/TR/xslt" rel="nofollow noreferrer">xsl(t)</a> and <a href="http://docs.php.net/class.xsltprocessor" rel="nofollow noreferrer">php's XSLTProcessor</a>.<br> In xslt 2.0 you could use something like</p> <pre><code>&lt;xsl:for-each-group select="release" group-by="title"&gt; </code></pre> <p>Unfortunately <a href="http://xmlsoft.org/XSLT/" rel="nofollow noreferrer">libxslt</a> doesn't support this (at least the version used in the php.net win32 build of php 5.3.2 doesn't).<br> But you can use the <a href="http://radio-weblogs.com/0118231/stories/2005/05/25/areYouTheGuyWhoDiscoveredTheMuenchianMethodOfGroupingInXslt.html" rel="nofollow noreferrer">Muenchian grouping method</a>.</p> <p>test.xsl:</p> <pre><code>&lt;xsl:stylesheet version="1.0" xmlns:xsl="http://www.w3.org/1999/XSL/Transform"&gt; &lt;xsl:output method="html" version="4.0" encoding="utf-8" indent="yes"/&gt; &lt;xsl:key name="release-by-title" match="release" use="title" /&gt; &lt;xsl:template match="/"&gt; &lt;html&gt; &lt;head&gt;&lt;title&gt;...&lt;/title&gt;&lt;/head&gt; &lt;body&gt; &lt;xsl:apply-templates /&gt; &lt;/body&gt; &lt;/html&gt; &lt;/xsl:template&gt; &lt;xsl:template match="releases"&gt; &lt;table border="1"&gt; &lt;xsl:for-each select="release[count(. | key('release-by-title', title)[1]) = 1]"&gt; &lt;xsl:sort select="title" /&gt; &lt;tr&gt; &lt;th colspan="3"&gt;&lt;xsl:value-of select="title" /&gt;&lt;/th&gt; &lt;/tr&gt; &lt;xsl:for-each select="key('release-by-title', title)"&gt; &lt;xsl:sort select="year" /&gt; &lt;tr&gt; &lt;td&gt;&lt;xsl:value-of select="year" /&gt;&lt;/td&gt; &lt;td&gt;&lt;xsl:value-of select="label" /&gt;&lt;/td&gt; &lt;td&gt;&lt;xsl:value-of select="format" /&gt;&lt;/td&gt; &lt;/tr&gt; &lt;/xsl:for-each&gt; &lt;/xsl:for-each&gt; &lt;/table&gt; &lt;/xsl:template&gt; &lt;/xsl:stylesheet&gt; </code></pre> <p>test.xml containing the xml document you provided.<br> And test.php:</p> <pre><code>&lt;?php $doc = new DOMDocument; $doc-&gt;load('test.xsl'); $stylesheet = new XSLTProcessor; $stylesheet-&gt;importStyleSheet($doc); $doc-&gt;load('test.xml'); header('Content-type: text/html; charset=utf-8'); echo $stylesheet-&gt;transformToXML($doc); </code></pre> <p>And the output (onlye the &lt;table&gt;-part) is:</p> <pre><code>&lt;table border="1"&gt; &lt;tr&gt;&lt;th colspan="3"&gt;The M.O.F Blend&lt;/th&gt;&lt;/tr&gt; &lt;tr&gt; &lt;td&gt;2002&lt;/td&gt; &lt;td&gt;Blenda Records&lt;/td&gt; &lt;td&gt;LP&lt;/td&gt; &lt;/tr&gt; &lt;tr&gt; &lt;td&gt;2002&lt;/td&gt; &lt;td&gt;Blenda Records&lt;/td&gt; &lt;td&gt;CD&lt;/td&gt; &lt;/tr&gt; &lt;tr&gt;&lt;th colspan="3"&gt;Versions&lt;/th&gt;&lt;/tr&gt; &lt;tr&gt; &lt;td&gt;1999&lt;/td&gt; &lt;td&gt;Not On Label&lt;/td&gt; &lt;td&gt;12", EP&lt;/td&gt; &lt;/tr&gt; &lt;tr&gt;&lt;th colspan="3"&gt;Ännu En Gång Vol. 3&lt;/th&gt;&lt;/tr&gt; &lt;tr&gt; &lt;td&gt;2001&lt;/td&gt; &lt;td&gt;Hemmalaget&lt;/td&gt; &lt;td&gt;Cass, Comp, Mix&lt;/td&gt; &lt;/tr&gt; &lt;/table&gt; </code></pre> <p>Now, that's not much of an explaination. But maybe it gives you some hints to what to search for.</p>
 

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