SimpleSAML\Utils\XML::getDOMChildren PHP Method

    public static function getDOMChildren(\DOMElement $element, $localName, $namespaceURI)
    {
        if (!$element instanceof \DOMElement || !is_string($localName) || !is_string($namespaceURI)) {
            throw new \InvalidArgumentException('Invalid input parameters.');
        }
        $ret = array();
        for ($i = 0; $i < $element->childNodes->length; $i++) {
            $child = $element->childNodes->item($i);
            // skip text nodes and comment elements
            if ($child instanceof \DOMText || $child instanceof \DOMComment) {
                continue;
            }
            if (self::isDOMElementOfType($child, $localName, $namespaceURI) === true) {
                $ret[] = $child;
            }
        }
        return $ret;
    }