take attribute node and print distinct value using xslt

php, xml, xpath, xslt

Solution

To select the distinct attribute values, you can use this XPath:

/page/tab[not(@dim=preceding-sibling::tab/@dim)]/@dim

A possible XSLT template would be

<?xml version="1.0" encoding="utf-8"?>
<xsl:stylesheet version="1.0" xmlns:xsl="http://www.w3.org/1999/XSL/Transform">
    <xsl:output method="text" />
    <xsl:template match="/">
        <xsl:for-each select="/page/tab[not(@dim=preceding-sibling::tab/@dim)]/@dim">
            <xsl:sort select="." data-type="number"/>
            <xsl:value-of select="concat(., substring(',', 2 - (position() != last())))"/>
        </xsl:for-each>
    </xsl:template>
</xsl:stylesheet>

To transform the source document with the stylesheet in PHP, you can use:

$xml = new DOMDocument;
$xml->load('collection.xml');
$xsl = new DOMDocument;
$xsl->load('collection.xsl');
$proc = new XSLTProcessor;
$proc->importStyleSheet($xsl);
echo $proc->transformToXML($xml);

This will give 30,40,70 in the output.

You can achieve the same without an XSLT by simply doing:

$page = simplexml_load_file('NewFile.xml');
$dims = $page->xpath('/page/tab[not(@dim=preceding-sibling::tab/@dim)]/@dim');
$dims = array_map('strval', $dims);
sort($dims);
echo implode(',', $dims);

Also see

- http://schlitt.info/opensource/blog/0704_xpath.html

- How do I generate a comma-separated list with XSLT/XPath?

- XPath 1.0 select distinct attribute of siblings

Problem

Original source

Related problems

• How do I generate a comma-separated list with XSLT/XPath?