Mine

function strMiddleReduceWordSensitive ($string, $max = 50, $rep = '[...]') {
    $strlen = strlen($string);

    if ($strlen <= $max)
        return $string;

    $lengthtokeep = $max - strlen($rep);
    $start = 0;
    $end = 0;

    if (($lengthtokeep % 2) == 0) {
        $start = $lengthtokeep / 2;
        $end = $start;
    } else {
        $start = intval($lengthtokeep / 2);
        $end = $start + 1;
    }

    $i = $start;
    $tmp_string = $string;
    while ($i < $strlen) {
        if ($tmp_string[$i] == ' ') {
            $tmp_string = substr($tmp_string, 0, $i) . $rep;
            $return = $tmp_string;
        }
        $i++;
    }

    $i = $end;
    $tmp_string = strrev ($string);
    while ($i < $strlen) {
        if ($tmp_string[$i] == ' ') {
            $tmp_string = substr($tmp_string, 0, $i);
            $return .= strrev ($tmp_string);
        }
        $i++;
    }
//    return $return;
    return substr($string, 0, $start) . $rep . substr($string, - $end);

return "ok";
}