How can numerical entities be used as a solution when dealing with special characters in XSL stylesheets in PHP?

When dealing with special characters in XSL stylesheets in PHP, numerical entities can be used as a solution. This involves replacing special characters with their corresponding numerical entities in the XSL stylesheet to ensure proper rendering. By using numerical entities, we can avoid conflicts with reserved characters in XML and ensure that the stylesheet is processed correctly. 

$xsl = '<?xml version="1.0" encoding="UTF-8"?>
<xsl:stylesheet version="1.0" xmlns:xsl="http://www.w3.org/1999/XSL/Transform">
  <xsl:template match="/">
    <html>
      <body>
        <h1>© Copyright Example</h1>
      </body>
    </html>
  </xsl:template>
</xsl:stylesheet>';

$processor = new XSLTProcessor();
$processor->importStylesheet(new SimpleXMLElement($xsl));
$result = $processor->transformToXML(new SimpleXMLElement('<root></root>'));

echo $result;

Keywords

numerical entities special characters XSL stylesheets PHP solution

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