Kalender dengan PHP

// fungsi untuk bikin kalender 1 bulan


function calendar($month = NULL, $year = NULL) {
    $month = $month ? $month : date("m");
    $year = $year >= 1900 ? $year : date("Y");
    $year = $year > 2038 ? 2038 : $year;
    $firstDayOfMonth = mktime(0, 0, 0, $month, 1, $year);
    $numberDays = date("t", $firstDayOfMonth);
    $dayOfWeek = date("w", $firstDayOfMonth);
    $month = (int) $month;
    $daysOfWeek = array('Ming', 'Sen', 'Sel', 'Rab', 'Kam', 'Jum', 'Sab');
    $nama_bulan = array(1 = > "Januari", "Februari", "Maret", "April", "Mei", "Juni", "Juli", "Agustus", "September", "Oktober", "November", "Desember");

    $calendar = "<table class=\"kalender\" border=0 cellspacing=0 cellpadding=1>";
    $calendar. = "<tr><th colspan=7 class=\"cap\">$nama_bulan[$month] $year</th></tr>";
    $calendar. = "<tr><th class=\"ming\">Ming</th><th>Sen</th><th>Sel</th><th>Rab</th><th>Kam</th><th class=\"jum\">Jum</th><th class=\"sab\">Sab</th></tr>";
    $currentDay = 1;
    $today = date("d");
    $calendar. = "<tr>";

    if ($dayOfWeek > 0) {
        $calendar. = "<td colspan=\"$dayOfWeek\">&nbsp;</td>";
    }

    while ($currentDay <= $numberDays) {
        if ($dayOfWeek == 7) {
            $dayOfWeek = 0;
            $calendar. = "</tr><tr>";
        }

        if ($dayOfWeek == "0") {
            if ($today == $currentDay && $month == date("n") && $year == date("Y")) $class_today = " today";
            else$class_today = "";
            $calendar. = "<td class=\"ming$class_today\">$currentDay</td>";
        }
        elseif($dayOfWeek == "5") {
            if ($today == $currentDay && $month == date("n") && $year == date("Y")) $class_today = " today";
            else$class_today = "";
            $calendar. = "<td class=\"jum$class_today\">$currentDay</td>";
        }
        elseif($dayOfWeek == "6") {
            if ($today == $currentDay && $month == date("n") && $year == date("Y")) $class_today = " today";
            else$class_today = "";
            $calendar. = "<td class=\"sab$class_today\">$currentDay</td>";
        } else {
            if ($today == $currentDay && $month == date("n") && $year == date("Y")) $class_today = " class=\"today\"";
            else$class_today = "";
            $calendar. = "<td$class_today>$currentDay</td>";
        }

        $currentDay++;
        $dayOfWeek++;
    }

    if ($dayOfWeek != 7) {
        $remainingDays = 7 - $dayOfWeek;
        $calendar. = "<td colspan=\"$remainingDays\">&nbsp;</td>";
    }
    $calendar. = "</tr></table>\n";
    return $calendar;
}


// olah data kalender menjadi kalender 12 bulan
echo "<table align=\"center\" class=all cellpadding=2 cellspacing=1>\n<tr>\n";
for ($i = 1; $i <= 12; $i++) {
    echo "<td id=m align=\"center\" valign=\"top\">\n";

    echo calendar($i, $y);
    echo "</td>\n";
    if (($i) % $cols == 0) {
        echo "</tr>\n<tr>";
    }
}
echo "</tr>\n</table>\n";