XslManager.php

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<?php

declare(strict_types=1);

namespace ILIAS\COPage\Xsl;

class XslManager
{
    public function __construct()
    {
    }

    public function process(
        string $xml,
        array $params
    ): string {
        $xslt = new \XSLTProcessor();
        $xsl = file_get_contents(ILIAS_ABSOLUTE_PATH . "/components/ILIAS/COPage/xsl/page.xsl");
        $xslt_domdoc = new \DomDocument();
        $xslt_domdoc->loadXML($xsl);
        $xslt->importStylesheet($xslt_domdoc);
        foreach ($params as $key => $value) {
            $xslt->setParameter("", $key, (string) $value);
        }
        $xml_domdoc = new \DomDocument();
        $xml_domdoc->loadXML($xml);
        // show warnings again due to discussion in #12866
        $result = $xslt->transformToXml($xml_domdoc);
        unset($xslt);
        return (string) $result;
    }
}