eCalendar.php

<style>
  html{direction:rtl;text-align:right;font-family: tahoma}
  .isToday{background:#ccc;color:red}
</style>

<?php
function build_calendar($month,$year) {
    // Create array containing abbreviations of days of week.
    $daysOfWeek = array('S','M','T','W','T','F','S');

    // What is the first day of the month in question?
    $firstDayOfMonth = mktime(0,0,0,$month,1,$year);

    // How many days does this month contain?
    $numberDays = date('t',$firstDayOfMonth);

    // Retrieve some information about the first day of the
    // month in question.
    $dateComponents = getdate($firstDayOfMonth);

    // What is the name of the month in question?
    $monthName = $dateComponents['month'];

    // What is the index value (0-6) of the first day of the
    // month in question.
    $dayOfWeek = $dateComponents['wday'];

    // Create the table tag opener and day headers
    $calendar = "<table class='calendar'>";
    $calendar .= "<caption>$monthName $year</caption>";
    $calendar .= "<tr>";

    // Create the calendar headers
    foreach($daysOfWeek as $day) {
      $calendar .= "<th class='header'>$day</th>";
    }

    // Create the rest of the calendar
    // Initiate the day counter, starting with the 1st.
    $currentDay = 1;
    $calendar .= "</tr><tr>";

    // The variable $dayOfWeek is used to ensure that the calendar
    // display consists of exactly 7 columns.
    if ($dayOfWeek > 0) {
      $calendar .= "<td colspan='$dayOfWeek'>&nbsp;</td>";
    }


    $today = date("Y-m-d", time());
    $month = str_pad($month, 2, "0", STR_PAD_LEFT);
    while ($currentDay <= $numberDays) {
      // Seventh column (Saturday) reached. Start a new row.
      if ($dayOfWeek == 7) {
           $dayOfWeek = 0;
           $calendar .= "</tr><tr>";
      }

      $currentDayRel = str_pad($currentDay, 2, "0", STR_PAD_LEFT);
      $date = "$year-$month-$currentDayRel";

      $isTodayCheck = $today == $date ? "isToday" : "";
      $calendar .= "<td class='day $isTodayCheck' rel='$date'>$currentDay</td>";

      // Increment counters
      $currentDay++;
      $dayOfWeek++;
    }

    // Complete the row of the last week in month, if necessary
    if ($dayOfWeek != 7) {
      $remainingDays = 7 - $dayOfWeek;
      $calendar .= "<td colspan='$remainingDays'>&nbsp;</td>";
    }

    $calendar .= "</tr>";
    $calendar .= "</table>";
    return $calendar;
}
?>

<?php
  // print Current Month
  $currentDate = getdate();
  $month = $currentDate['mon'];
  $year = $currentDate['year'];
  echo build_calendar($month,$year);
?>

<hr/>


<?php
  // print Month 1 of 2000
  $m1y2000=build_calendar(1,2000);
  echo $m1y2000;
?>