erroneous vod inclusion

function include_vods()
{
    global $nen, $prj;
    $ret = '';

    if( !is_dir( $nen['root'] . 'showcase/vault/' . $prj . '/vods' ) )
    {
        return '';
    }

    $d = array_diff( scandir( $nen['root'] . 'showcase/vault/' . $prj . '/vods/' ), array('..', '.' ) );
    foreach( $d as $entry );
    {

        if( strtolower( substr( $entry, -4, 4 ) ) === '.mp4' )
        {
            $ret .= '<span>{{vod|' . $prj . '|' . strtolower( substr( $entry, 0, -4 ) ) . '|' . strtolower( substr( $entry, 0, -4 ) ) . '}}</span>' . "\r\n";
        }
    }

    if ( strlen( $ret ) !== 0)
    {
        $ret = '<table><th><h2>Vods</h2></th><tr><td>' . $ret . '</td></tr></table>';
    }
    return $ret;
}