saveDomDocument example

return false;
    }

    $xpath = new DOMXPath( $doc );
    $rules = $xpath->query( '/configuration/system.webServer/rewrite/rules/rule[starts-with(@name,\'wordpress\')] | /configuration/system.webServer/rewrite/rules/rule[starts-with(@name,\'WordPress\')]' );

    if ( $rules->length > 0 ) {
        $child  = $rules->item( 0 );
        $parent = $child->parentNode;
        $parent->removeChild( $child );
        $doc->formatOutput = true;
        saveDomDocument( $doc, $filename );
    }

    return true;
}

/** * Adds WordPress rewrite rule to the IIS 7+ configuration file. * * @since 2.8.0 * * @param string $filename The file path to the configuration file. * @param string $rewrite_rule The XML fragment with URL Rewrite rule. * @return bool */