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Get Tags That Start With Uppercase In Xpath (php)

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I'm trying to get html tags that start with uppercase using DOMDocument in PHP 5.3. I'm using a php function registered in XPath to test it, but the function is receiving as first

Solution 1:

Load the code as XML and not HTML. The HTML is not case-sensitive.

$xmlDoc->loadXML('<html>');

instead of:

$xmlDoc->loadHTML('<html>');

Solution 2:

A complete working example (test.php):

$doc = new DOMDocument;
$doc->load('test.xml');

$xpath = new DOMXPath($doc);
$xpath->registerNamespace("php", "http://php.net/xpath");
$xpath->registerPHPFunctions("isUpper");

functionisUpper($name) {
    return (bool)preg_match('/^[A-Z]/', $name);
}

$els = $xpath->query('//*[php:function("isUpper", name())]');

foreach ($elsas$el) {
    echo$el->nodeValue . "\n";
}

test.xml:

<test><A>Match this</A><b>Dont match this</b></test>

Output:

lwburk$ php test.php 
Match this

Solution 3:

Use this one-liner:

//*[contains('ABCDEFGHIJKLMNOPQRSTUVWXYZ', substring(name(),1,1))]

this selects any element in the XML document, the first character of whose name is contained in the string of all capital letters.

XSLT - based verification:

<xsl:stylesheetversion="1.0"xmlns:xsl="http://www.w3.org/1999/XSL/Transform"><xsl:outputomit-xml-declaration="yes"indent="yes"/><xsl:templatematch="/"><xsl:copy-ofselect=
  "//*[contains('ABCDEFGHIJKLMNOPQRSTUVWXYZ', substring(name(),1,1))]"/></xsl:template></xsl:stylesheet>

when this transformation is applied on the provided XML document:

<test><A>Match this</A><b>Dont match this</b></test>

the XPath expression is evaluated and the selected nodes (in this case just one) are copied to the output:

<A>Match this</A>

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