date.lib.php

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<?php
/* Copyright (C) 2004-2011 Laurent Destailleur  <eldy@users.sourceforge.net>
 * Copyright (C) 2005-2011 Regis Houssin        <regis.houssin@inodbox.com>
 * Copyright (C) 2011-2015 Juanjo Menent        <jmenent@2byte.es>
 * Copyright (C) 2017      Ferran Marcet        <fmarcet@2byte.es>
 * Copyright (C) 2018-2024 Charlene Benke       <charlene@patas-monkey.com>
 * Copyright (C) 2024-2025  MDW         <mdeweerd@users.noreply.github.com>
 * Copyright (C) 2024      Frédéric France      <frederic.france@free.fr>
 *
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation; either version 3 of the License, or
 * (at your option) any later version.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program. If not, see <https://www.gnu.org/licenses/>.
 * or see https://www.gnu.org/
 */
 
function get_tz_array()
{
  $tzarray = array(
    -11 => "Pacific/Pago_Pago",
    -10 => "Pacific/Honolulu",
    -9 => "America/Anchorage",
    -8 => "America/Los_Angeles",
    -7 => "America/Dawson_Creek",
    -6 => "America/Chicago",
    -5 => "America/Bogota",
    -4 => "America/Asuncion",
    -3 => "America/Araguaina",
    -2 => "America/Noronha",
    -1 => "Atlantic/Azores",
    0 => "Europe/London",
    1 => "Europe/Paris",
    2 => "Europe/Helsinki",
    3 => "Europe/Moscow",
    4 => "Asia/Dubai",
    5 => "Asia/Karachi",
    6 => "Indian/Chagos",
    7 => "Asia/Jakarta",
    8 => "Asia/Hong_Kong",
    9 => "Asia/Tokyo",
    10 => "Australia/Sydney",
    11 => "Pacific/Noumea",
    12 => "Pacific/Auckland",
    13 => "Pacific/Fakaofo",
    14 => "Pacific/Kiritimati"
  );
  return $tzarray;
}
 
 
function getServerTimeZoneString()
{
  return @date_default_timezone_get();
}
 
function getServerTimeZoneInt($refgmtdate = 'now')
{
  if (method_exists('DateTimeZone', 'getOffset')) {
    // Method 1 (include daylight)
    $gmtnow = dol_now('gmt');
    $yearref = dol_print_date($gmtnow, '%Y');
    $monthref = dol_print_date($gmtnow, '%m');
    $dayref = dol_print_date($gmtnow, '%d');
    if ($refgmtdate == 'now') {
      $newrefgmtdate = $yearref.'-'.$monthref.'-'.$dayref;
    } elseif ($refgmtdate == 'summer') {
      $newrefgmtdate = $yearref.'-08-01';
    } else {
      $newrefgmtdate = $yearref.'-01-01';
    }
    $newrefgmtdate .= 'T00:00:00+00:00';
    $localtz = new DateTimeZone(getServerTimeZoneString());
    $localdt = new DateTime($newrefgmtdate, $localtz);
    $tmp = -1 * $localtz->getOffset($localdt);
    //print $refgmtdate.'='.$tmp;
  } else {
    $tmp = 0;
    dol_print_error(null, 'PHP version must be 5.3+');
  }
  $tz = round(($tmp < 0 ? 1 : -1) * abs($tmp / 3600));
  return $tz;
}
 
 
function dol_time_plus_duree($time, $duration_value, $duration_unit, $ruleforendofmonth = 0, $tz = '')
{
  if (empty($duration_value)) {
    return $time;
  }
  if ($duration_unit == 's') {
    return $time + (int) ($duration_value);
  }
  if ($duration_unit == 'i' || $duration_unit == 'mn' || $duration_unit == 'min') {
    return $time + (int) (60 * $duration_value);
  }
  if ($duration_unit == 'h') {
    return $time + (int) (3600 * $duration_value);
  }
  if ($duration_unit == 'w') {
    return $time + (int) (3600 * 24 * 7 * $duration_value);
  }
 
  $deltastring = 'P';
 
  $sub = false;
 
  if ($duration_value > 0) {
    $deltastring .= abs($duration_value);
    $sub = false;
  }
  if ($duration_value < 0) {
    $deltastring .= abs($duration_value);
    $sub = true;
  }
  if ($duration_unit == 'd') {
    $deltastring .= "D";
  }
  if ($duration_unit == 'm') {
    $deltastring .= "M";
  }
  if ($duration_unit == 'y') {
    $deltastring .= "Y";
  }
 
  $date = new DateTime();
  if ($tz == 'gmt') {
    $date->setTimezone(new DateTimeZone('UTC'));
  } elseif ($tz !== '') {
    $date->setTimezone(new DateTimeZone($tz == 'tzserver' ? date_default_timezone_get() : $tz));
  } elseif (!function_exists('getDolGlobalString') || !getDolGlobalString('MAIN_DATE_IN_MEMORY_ARE_NOT_GMT')) { // Add function_exists to allow usage of this function with minimal context
    $date->setTimezone(new DateTimeZone('UTC'));
  }
 
 
  $date->setTimestamp((int) $time);
  $interval = new DateInterval($deltastring);
 
  if ($sub) {
    $date->sub($interval);
  } else {
    $date->add($interval);
  }
 
  // Change the behavior of PHP over data-interval when the result of this function is Feb 29 (non-leap years), 30 or Feb 31 (so php returns March 1, 2 or 3 respectively)
  if ($ruleforendofmonth == 1 && $duration_unit == 'm' && $tz !== '') {
    // Months are compared in the same timezone than the one used to add the delay
    $origin = new DateTime('@'.((int) $time));
    $origin->setTimezone($date->getTimezone());
    $monthsexpected = ((int) $origin->format('Y') * 12) + (int) $origin->format('n') + (int) $duration_value;
    if (((int) $date->format('Y') * 12) + (int) $date->format('n') != $monthsexpected) {
      $date->modify('last day of previous month');  // Keep the time of the day
    }
  } elseif ($ruleforendofmonth == 1 && $duration_unit == 'm') {
    $timeyear = (int) dol_print_date($time, '%Y');
    $timemonth = (int) dol_print_date($time, '%m');
    $timetotalmonths = (($timeyear * 12) + $timemonth);
 
    $monthsexpected = ($timetotalmonths + $duration_value);
 
    $newtime = $date->getTimestamp();
 
    $newtimeyear = (int) dol_print_date($newtime, '%Y');
    $newtimemonth = (int) dol_print_date($newtime, '%m');
    $newtimetotalmonths = (($newtimeyear * 12) +  $newtimemonth);
 
    if ($monthsexpected < $newtimetotalmonths || $monthsexpected > $newtimetotalmonths) { // If months differs
      $newtimehours = (int) dol_print_date($newtime, '%H');
      $newtimemins = (int) dol_print_date($newtime, '%M');
      $newtimesecs = (int) dol_print_date($newtime, '%S');
 
      $datelim = dol_mktime($newtimehours, $newtimemins, $newtimesecs, $newtimemonth, 1, $newtimeyear); // Take first day
      $datelim -= (3600 * 24);    // Remove 1 day to get the last day of month
 
      $date->setTimestamp($datelim);  // Set new date
    }
  }
  return $date->getTimestamp();
}
 
 
function convertTime2Seconds($iHours = 0, $iMinutes = 0, $iSeconds = 0)
{
  $iResult = ((int) $iHours * 3600) + ((int) $iMinutes * 60) + (int) $iSeconds;
  return $iResult;
}
 
 
function convertSecondToTime($iSecond, $format = 'all', $lengthOfDay = 86400, $lengthOfWeek = 7)
{
  global $langs;
 
  if (empty($lengthOfDay)) {
    $lengthOfDay = 86400; // 1 day = 24 hours
  }
  if (empty($lengthOfWeek)) {
    $lengthOfWeek = 7; // 1 week = 7 days
  }
  $nbHbyDay = $lengthOfDay / 3600;
 
  $sTime = '';
 
  if ($format == 'all' || $format == 'allwithouthour' || $format == 'allhour' || $format == 'allhourmin' || $format == 'allhourminsec') {
    if ((int) $iSecond === 0) {
      return '0'; // This is to avoid having 0 return a 12:00 AM for en_US
    }
 
    $sDay = 0;
    $sWeek = 0;
 
    if ($iSecond >= $lengthOfDay) {
      for ($i = $iSecond; $i >= $lengthOfDay; $i -= $lengthOfDay) {
        $sDay++;
        $iSecond -= $lengthOfDay;
      }
      $dayTranslate = $langs->trans("Day");
      if ($iSecond >= ($lengthOfDay * 2)) {
        $dayTranslate = $langs->trans("Days");
      }
    }
 
    if ($lengthOfWeek < 7) {
      if ($sDay) {
        if ($sDay >= $lengthOfWeek) {
          $sWeek = (int) (($sDay - $sDay % $lengthOfWeek) / $lengthOfWeek);
          $sDay %= $lengthOfWeek;
          $weekTranslate = $langs->trans("DurationWeek");
          if ($sWeek >= 2) {
            $weekTranslate = $langs->trans("DurationWeeks");
          }
          $sTime .= $sWeek.' '.$weekTranslate.' ';
        }
      }
    }
    if ($sDay > 0) {
      $dayTranslate = $langs->trans("Day");
      if ($sDay > 1) {
        $dayTranslate = $langs->trans("Days");
      }
      $sTime .= $sDay.' '.$langs->trans("d").' ';
    }
 
    if ($format == 'all') {
      if ($iSecond || empty($sDay)) {
        $sTime .= dol_print_date($iSecond, 'hourduration', true);
      }
    } elseif ($format == 'allhourminsec') {
      return sprintf("%02d", ($sWeek * $lengthOfWeek * $nbHbyDay + $sDay * $nbHbyDay + (int) floor($iSecond / 3600))).':'.sprintf("%02d", ((int) floor(($iSecond % 3600) / 60))).':'.sprintf("%02d", ((int) ($iSecond % 60)));
    } elseif ($format == 'allhourmin') {
      return sprintf("%02d", ($sWeek * $lengthOfWeek * $nbHbyDay + $sDay * $nbHbyDay + (int) floor($iSecond / 3600))).':'.sprintf("%02d", ((int) floor(($iSecond % 3600) / 60)));
    } elseif ($format == 'allhour') {
      return sprintf("%02d", ($sWeek * $lengthOfWeek * $nbHbyDay + $sDay * $nbHbyDay + (int) floor($iSecond / 3600)));
    }
  } elseif ($format == 'hour') {  // only hour part
    $sTime = dol_print_date($iSecond, '%H', true);
  } elseif ($format == 'fullhour') {
    if (!empty($iSecond)) {
      $iSecond /= 3600;
    } else {
      $iSecond = 0;
    }
    $sTime = $iSecond;
  } elseif ($format == 'min') { // only min part
    $sTime = dol_print_date($iSecond, '%M', true);
  } elseif ($format == 'sec') { // only sec part
    $sTime = dol_print_date($iSecond, '%S', true);
  } elseif ($format == 'month') { // only month part
    $sTime = dol_print_date($iSecond, '%m', true);
  } elseif ($format == 'year') {  // only year part
    $sTime = dol_print_date($iSecond, '%Y', true);
  }
  return trim((string) $sTime);
}
 
 
function convertDurationtoHour($duration_value, $duration_unit)
{
  $result = 0;
 
  if ($duration_unit == 's') {
    $result = $duration_value / 3600;
  }
  if ($duration_unit == 'i' || $duration_unit == 'mn' || $duration_unit == 'min') {
    $result = $duration_value / 60;
  }
  if ($duration_unit == 'h') {
    $result = $duration_value;
  }
  if ($duration_unit == 'd') {
    $result = $duration_value * 24;
  }
  if ($duration_unit == 'w') {
    $result = $duration_value * 24 * 7;
  }
  if ($duration_unit == 'm') {
    $result = $duration_value * 730.484;
  }
  if ($duration_unit == 'y') {
    $result = $duration_value * 365 * 24;
  }
 
  return $result;
}
 
function dolSqlDateFilter($datefield, $day_date, $month_date, $year_date, $excludefirstand = 0, $gm = false)
{
  global $db;
  $sqldate = '';
 
  $day_date = intval($day_date);
  $month_date = intval($month_date);
  $year_date = intval($year_date);
 
  if ($month_date > 0) {
    if ($month_date > 12) { // protection for bad value of month
      return " AND 1 = 2";
    }
    if ($year_date > 0 && empty($day_date)) {
      $sqldate .= ($excludefirstand ? "" : " AND ").$datefield." BETWEEN '".$db->idate(dol_get_first_day($year_date, $month_date, $gm));
      $sqldate .= "' AND '".$db->idate(dol_get_last_day($year_date, $month_date, $gm))."'";
    } elseif ($year_date > 0 && !empty($day_date)) {
      $sqldate .= ($excludefirstand ? "" : " AND ").$datefield." BETWEEN '".$db->idate(dol_mktime(0, 0, 0, $month_date, $day_date, $year_date, $gm));
      $sqldate .= "' AND '".$db->idate(dol_mktime(23, 59, 59, $month_date, $day_date, $year_date, $gm))."'";
    } else {
      // This case is not reliable on TZ, but we should not need it.
      $sqldate .= ($excludefirstand ? "" : " AND ")." date_format( ".$datefield.", '%c') = '".$db->escape((string) $month_date)."'";
    }
  } elseif ($year_date > 0) {
    $sqldate .= ($excludefirstand ? "" : " AND ").$datefield." BETWEEN '".$db->idate(dol_get_first_day($year_date, 1, $gm));
    $sqldate .= "' AND '".$db->idate(dol_get_last_day($year_date, 12, $gm))."'";
  }
  return $sqldate;
}
 
function dol_stringtotime($string, $gm = 1)
{
  $reg = array();
  // Convert date with format DD/MM/YYY HH:MM:SS. This part of code should not be used.
  if (preg_match('/^([0-9]+)\/([0-9]+)\/([0-9]+)\s?([0-9]+)?:?([0-9]+)?:?([0-9]+)?/i', $string, $reg)) {
    dol_syslog("dol_stringtotime call to function with deprecated parameter format", LOG_WARNING);
    // Date est au format 'DD/MM/YY' ou 'DD/MM/YY HH:MM:SS'
    // Date est au format 'DD/MM/YYYY' ou 'DD/MM/YYYY HH:MM:SS'
    $sday = (int) $reg[1];
    $smonth = (int) $reg[2];
    $syear = (int) $reg[3];
    $shour = (int) $reg[4];
    $smin = (int) $reg[5];
    $ssec = (int) $reg[6];
    if ($syear < 50) {
      $syear += 1900;
    }
    if ($syear >= 50 && $syear < 100) {
      $syear += 2000;
    }
    $string = sprintf("%04d%02d%02d%02d%02d%02d", $syear, $smonth, $sday, $shour, $smin, $ssec);
  } elseif (preg_match('/^([0-9]{4})-([0-9]{2})-([0-9]{2})T([0-9]{2}):([0-9]{2}):([0-9]{2})Z$/i', $string, $reg)  // Convert date with format YYYY-MM-DDTHH:MM:SSZ (RFC3339)
    || preg_match('/^([0-9]{4})-([0-9]{2})-([0-9]{2}) ([0-9]{2}):([0-9]{2}):([0-9]{2})$/i', $string, $reg)  // Convert date with format YYYY-MM-DD HH:MM:SS
    || preg_match('/^([0-9]{4})([0-9]{2})([0-9]{2})T([0-9]{2})([0-9]{2})([0-9]{2})Z$/i', $string, $reg)   // Convert date with format YYYYMMDDTHHMMSSZ
  ) {
    $syear = (int) $reg[1];
    $smonth = (int) $reg[2];
    $sday = (int) $reg[3];
    $shour = (int) $reg[4];
    $smin = (int) $reg[5];
    $ssec = (int) $reg[6];
    $string = sprintf("%04d%02d%02d%02d%02d%02d", $syear, $smonth, $sday, $shour, $smin, $ssec);
  }
 
  $string = preg_replace('/([^0-9])/i', '', $string);
  $tmp = $string.'000000';
  // Clean $gm
  if ($gm === 1) {
    $gm = 'gmt';
  } elseif (empty($gm) || $gm === 'tzserver') {
    $gm = 'tzserver';
  }
 
  $date = dol_mktime((int) substr($tmp, 8, 2), (int) substr($tmp, 10, 2), (int) substr($tmp, 12, 2), (int) substr($tmp, 4, 2), (int) substr($tmp, 6, 2), (int) substr($tmp, 0, 4), $gm);
 
  return $date;
}
 
 
function dol_get_prev_day($day, $month, $year)
{
  $time = dol_mktime(12, 0, 0, $month, $day, $year, 1, 0);
  $time -= 24 * 60 * 60;
  $tmparray = dol_getdate($time, true);
  return array('year' => $tmparray['year'], 'month' => $tmparray['mon'], 'day' => $tmparray['mday']);
}
 
function dol_get_next_day($day, $month, $year)
{
  $time = dol_mktime(12, 0, 0, $month, $day, $year, 1, 0);
  $time += 24 * 60 * 60;
  $tmparray = dol_getdate($time, true);
  return array('year' => $tmparray['year'], 'month' => $tmparray['mon'], 'day' => $tmparray['mday']);
}
 
function dol_get_prev_month($month, $year)
{
  if ($month == 1) {
    $prev_month = 12;
    $prev_year  = $year - 1;
  } else {
    $prev_month = $month - 1;
    $prev_year  = $year;
  }
  return array('year' => $prev_year, 'month' => $prev_month);
}
 
function dol_get_next_month($month, $year)
{
  if ($month == 12) {
    $next_month = 1;
    $next_year  = $year + 1;
  } else {
    $next_month = $month + 1;
    $next_year  = $year;
  }
  return array('year' => $next_year, 'month' => $next_month);
}
 
function dol_get_prev_week($day, $week, $month, $year)
{
  $tmparray = dol_get_first_day_week($day, $month, $year);
 
  $time = dol_mktime(12, 0, 0, $month, $tmparray['first_day'], $year, 1, 0);
  $time -= 24 * 60 * 60 * 7;
  $tmparray = dol_getdate($time, true);
  return array('year' => $tmparray['year'], 'month' => $tmparray['mon'], 'day' => $tmparray['mday']);
}
 
function dol_get_next_week($day, $week, $month, $year)
{
  $tmparray = dol_get_first_day_week($day, $month, $year);
 
  $time = dol_mktime(12, 0, 0, $tmparray['first_month'], $tmparray['first_day'], $tmparray['first_year'], 1, 0);
  $time += 24 * 60 * 60 * 7;
  $tmparray = dol_getdate($time, true);
 
  return array('year' => $tmparray['year'], 'month' => $tmparray['mon'], 'day' => $tmparray['mday']);
}
 
function dol_get_first_day($year, $month = 1, $gm = false)
{
  if ($year > 9999) {
    return '';
  }
  return dol_mktime(0, 0, 0, $month, 1, $year, $gm);
}
 
 
function dol_get_last_day($year, $month = 12, $gm = false)
{
  if ($year > 9999) {
    return '';
  }
  if ($month == 12) {
    $month = 1;
    $year += 1;
  } else {
    $month += 1;
  }
 
  // On se deplace au debut du mois suivant, et on retire un jour
  $datelim = dol_mktime(23, 59, 59, $month, 1, $year, $gm);
  $datelim -= (3600 * 24);
 
  return $datelim;
}
 
function dol_get_last_hour($date, $gm = 'tzserver')
{
  $tmparray = dol_getdate($date, false, ($gm == 'gmt' ? 'gmt' : ''));
  return dol_mktime(23, 59, 59, $tmparray['mon'], $tmparray['mday'], $tmparray['year'], $gm);
}
 
function dol_get_first_hour($date, $gm = 'tzserver')
{
  $tmparray = dol_getdate($date, false, ($gm == 'gmt' ? 'gmt' : ''));
  return dol_mktime(0, 0, 0, $tmparray['mon'], $tmparray['mday'], $tmparray['year'], $gm);
}
 
function dol_get_first_day_week($day, $month, $year, $gm = false)
{
  //$day=2; $month=2; $year=2015;
  $date = dol_mktime(0, 0, 0, $month, $day, $year, $gm);
 
  //Checking conf of start week
  $start_week = getDolGlobalInt('MAIN_START_WEEK', 1);
 
  $tmparray = dol_getdate($date, true); // detail of current day
 
  //Calculate days = offset from current day
  $days = $start_week - $tmparray['wday'];
  if ($days >= 1) {
    $days = 7 - $days;
  }
  $days = abs($days);
  $seconds = $days * 24 * 60 * 60;
  //print 'start_week='.$start_week.' tmparray[wday]='.$tmparray['wday'].' day offset='.$days.' seconds offset='.$seconds.'<br>';
 
  //Get first day of week
  $tmpdaytms = (int) date((string) $tmparray['0']) - $seconds; // $tmparray[0] is day of parameters
  $tmpday = idate("d", $tmpdaytms);
 
  //Check first day of week is in same month than current day or not
  if ($tmpday > $day) {
    $prev_month = $month - 1;
    $prev_year = $year;
 
    if ($prev_month == 0) {
      $prev_month = 12;
      $prev_year  = $year - 1;
    }
  } else {
    $prev_month = $month;
    $prev_year = $year;
  }
  $tmpmonth = $prev_month;
  $tmpyear = $prev_year;
 
  //Get first day of next week
  $tmptime = dol_mktime(12, 0, 0, $month, $tmpday, $year, 1, 0);
  $tmptime -= 24 * 60 * 60 * 7;
  $tmparray = dol_getdate($tmptime, true);
  $prev_day = $tmparray['mday'];
 
  //Check prev day of week is in same month than first day or not
  if ($prev_day > $tmpday) {
    $prev_month = $month - 1;
    $prev_year = $year;
 
    if ($prev_month == 0) {
      $prev_month = 12;
      $prev_year  = $year - 1;
    }
  }
 
  $week = date("W", dol_mktime(0, 0, 0, $tmpmonth, $tmpday, $tmpyear, $gm));
 
  return array('year' => $year, 'month' => $month, 'week' => $week, 'first_day' => $tmpday, 'first_month' => $tmpmonth, 'first_year' => $tmpyear, 'prev_year' => $prev_year, 'prev_month' => $prev_month, 'prev_day' => $prev_day);
}
 
function getGMTEasterDatetime($year)
{
  $base = new DateTime("$year-03-21", new DateTimeZone("UTC"));
  $days = easter_days($year); // Return number of days between 21 march and easter day.
  $tmp = $base->add(new DateInterval("P{$days}D"));
  return $tmp->getTimestamp();
}
 
function num_public_holiday($timestampStart, $timestampEnd, $countryCodeOrId = '', $lastday = 0, $includesaturday = -1, $includesunday = -1, $includefriday = -1, $includemonday = -1)
{
  global $conf, $db, $mysoc;
 
  $nbFerie = 0;
 
  // Check to ensure we use correct parameters
  if (($timestampEnd - $timestampStart) % 86400 != 0) {
    return 'Error Dates must use same hours and must be GMT dates';
  }
 
  if (empty($countryCodeOrId)) {
    $countryCodeOrId = $mysoc->country_code;
  }
  if ($includemonday < 0) {
    $includemonday = getDolGlobalInt('MAIN_NON_WORKING_DAYS_INCLUDE_MONDAY', 0);
  }
  if ($includefriday < 0) {
    $includefriday = getDolGlobalInt('MAIN_NON_WORKING_DAYS_INCLUDE_FRIDAY', 0);
  }
  if ($includesaturday < 0) {
    $includesaturday = getDolGlobalInt('MAIN_NON_WORKING_DAYS_INCLUDE_SATURDAY', 1);
  }
  if ($includesunday < 0) {
    $includesunday = getDolGlobalInt('MAIN_NON_WORKING_DAYS_INCLUDE_SUNDAY', 1);
  }
 
  if (is_numeric($countryCodeOrId)) {
    $country_id = $countryCodeOrId;
  } else {
    $country_id = dol_getIdFromCode($db, $countryCodeOrId, 'c_country', 'code', 'rowid');
  }
 
  if (empty($conf->cache['arrayOfActivePublicHolidays_'.$country_id])) {
    // Loop on public holiday defined into hrm_public_holiday for the day, month and year analyzed
    $tmpArrayOfPublicHolidays = array();
    $sql = "SELECT id, code, entity, fk_country, dayrule, year, month, day, active";
    $sql .= " FROM ".MAIN_DB_PREFIX."c_hrm_public_holiday";
    $sql .= " WHERE active = 1 and fk_country IN (0".($country_id > 0 ? ", ".$country_id : 0).")";
    $sql .= " AND entity IN (0," .getEntity('holiday') .")";
 
    $resql = $db->query($sql);
    if ($resql) {
      $num_rows = $db->num_rows($resql);
      $i = 0;
      while ($i < $num_rows) {
        $obj = $db->fetch_object($resql);
        $tmpArrayOfPublicHolidays[$obj->id] = array('dayrule' => $obj->dayrule, 'year' => $obj->year, 'month' => $obj->month, 'day' => $obj->day);
        $i++;
      }
    } else {
      dol_syslog($db->lasterror(), LOG_ERR);
      return 'Error sql '.$db->lasterror();
    }
 
    //var_dump($tmpArrayOfPublicHolidays);
    $conf->cache['arrayOfActivePublicHolidays_'.$country_id] = $tmpArrayOfPublicHolidays;
  }
 
  $arrayOfPublicHolidays = $conf->cache['arrayOfActivePublicHolidays_'.$country_id];
 
  $i = 0;
  while ((($lastday == 0 && $timestampStart < $timestampEnd) || ($lastday && $timestampStart <= $timestampEnd))
    && ($i < 50000)) {    // Loop end when equals (Test on i is a security loop to avoid infinite loop)
    $ferie = false;
    $specialdayrule = array();
 
    $jour  = (int) gmdate("d", $timestampStart);
    $mois  = (int) gmdate("m", $timestampStart);
    $annee = (int) gmdate("Y", $timestampStart);
    $jour_semaine = (int) gmdate("w", $timestampStart);   // sunday = 0, monday = 1, ...
 
    //print "jour=".$jour." month=".$mois." year=".$annee." includesaturday=".$includesaturday." includesunday=".$includesunday."\n";
    foreach ($arrayOfPublicHolidays as $entrypublicholiday) {
      if (!empty($entrypublicholiday['dayrule']) && $entrypublicholiday['dayrule'] != 'date') {   // For example 'easter', '...'
        $specialdayrule[$entrypublicholiday['dayrule']] = $entrypublicholiday['dayrule'];
      } else {
        $match = 1;
        if (!empty($entrypublicholiday['year']) && $entrypublicholiday['year'] != $annee) {
          $match = 0;
        }
        if ($entrypublicholiday['month'] != $mois) {
          $match = 0;
        }
        if ($entrypublicholiday['day'] != $jour) {
          $match = 0;
        }
 
        if ($match) {
          $ferie = true;
        }
      }
 
      $i++;
    }
    //var_dump($specialdayrule)."\n";
    //print "ferie=".$ferie."\n";
 
    if (!$ferie) {
      // Special dayrules
      if (in_array('easter', $specialdayrule)) {
        // Calculation for easter date
        $date_paques = getGMTEasterDatetime($annee);
        $jour_paques = gmdate("d", $date_paques);
        $mois_paques = gmdate("m", $date_paques);
        if ($jour_paques == $jour && $mois_paques == $mois) {
          $ferie = true;
        }
        // Easter (sunday)
      }
 
      if (in_array('eastermonday', $specialdayrule)) {
        // Calculation for the monday of easter date
        $date_paques = getGMTEasterDatetime($annee);
        //print 'PPP'.$date_paques.' '.dol_print_date($date_paques, 'dayhour', 'gmt')." ";
        $date_lundi_paques = $date_paques + (3600 * 24);
        $jour_lundi_paques = gmdate("d", $date_lundi_paques);
        $mois_lundi_paques = gmdate("m", $date_lundi_paques);
        if ($jour_lundi_paques == $jour && $mois_lundi_paques == $mois) {
          $ferie = true;
        }
        // Easter (monday)
        //print 'annee='.$annee.' $jour='.$jour.' $mois='.$mois.' $jour_lundi_paques='.$jour_lundi_paques.' $mois_lundi_paques='.$mois_lundi_paques."\n";
      }
 
      //Good Friday
      if (in_array('goodfriday', $specialdayrule)) {
        // Pulls the date of Easter
        $easter = getGMTEasterDatetime($annee);
 
        // Calculates the date of Good Friday based on Easter
        $date_good_friday  = $easter - (2 * 3600 * 24);
        $dom_good_friday   = gmdate("d", $date_good_friday);
        $month_good_friday = gmdate("m", $date_good_friday);
 
        if ($dom_good_friday == $jour && $month_good_friday == $mois) {
          $ferie = true;
        }
      }
 
      if (in_array('ascension', $specialdayrule)) {
        // Calcul du jour de l'ascension (39 days after easter day)
        $date_paques = getGMTEasterDatetime($annee);
        $date_ascension = $date_paques + (3600 * 24 * 39);
        $jour_ascension = gmdate("d", $date_ascension);
        $mois_ascension = gmdate("m", $date_ascension);
        if ($jour_ascension == $jour && $mois_ascension == $mois) {
          $ferie = true;
        }
        // Ascension (thursday)
      }
 
      if (in_array('pentecost', $specialdayrule)) {
        // Calculation of "Pentecote" (49 days after easter day)
        $date_paques = getGMTEasterDatetime($annee);
        $date_pentecote = $date_paques + (3600 * 24 * 49);
        $jour_pentecote = gmdate("d", $date_pentecote);
        $mois_pentecote = gmdate("m", $date_pentecote);
        if ($jour_pentecote == $jour && $mois_pentecote == $mois) {
          $ferie = true;
        }
        // "Pentecote" (sunday)
      }
      if (in_array('pentecotemonday', $specialdayrule)) {
        // Calculation of "Pentecote" (49 days after easter day)
        $date_paques = getGMTEasterDatetime($annee);
        $date_pentecote = $date_paques + (3600 * 24 * 50);
        $jour_pentecote = gmdate("d", $date_pentecote);
        $mois_pentecote = gmdate("m", $date_pentecote);
        if ($jour_pentecote == $jour && $mois_pentecote == $mois) {
          $ferie = true;
        }
        // "Pentecote" (monday)
      }
 
      if (in_array('viernessanto', $specialdayrule)) {
        // Viernes Santo
        $date_paques = getGMTEasterDatetime($annee);
        $date_viernes = $date_paques - (3600 * 24 * 2);
        $jour_viernes = gmdate("d", $date_viernes);
        $mois_viernes = gmdate("m", $date_viernes);
        if ($jour_viernes == $jour && $mois_viernes == $mois) {
          $ferie = true;
        }
        //Viernes Santo
      }
 
      if (in_array('fronleichnam', $specialdayrule)) {
        // Fronleichnam (60 days after easter sunday)
        $date_paques = getGMTEasterDatetime($annee);
        $date_fronleichnam = $date_paques + (3600 * 24 * 60);
        $jour_fronleichnam = gmdate("d", $date_fronleichnam);
        $mois_fronleichnam = gmdate("m", $date_fronleichnam);
        if ($jour_fronleichnam == $jour && $mois_fronleichnam == $mois) {
          $ferie = true;
        }
        // Fronleichnam
      }
 
      if (in_array('genevafast', $specialdayrule)) {
        // Geneva fast in Switzerland (Thursday after the first sunday in September)
        $date_1sunsept = strtotime('next thursday', strtotime('next sunday', mktime(0, 0, 0, 9, 1, $annee)));
        $jour_1sunsept = date("d", $date_1sunsept);
        $mois_1sunsept = date("m", $date_1sunsept);
        if ($jour_1sunsept == $jour && $mois_1sunsept == $mois) {
          $ferie = true;
        }
        // Geneva fast in Switzerland
      }
    }
    //print "ferie afterspe=".$ferie."\n";
 
    // If we have to include Friday, Saturday and Sunday
    if (!$ferie) {
      if ($includefriday || $includesaturday || $includesunday || $includemonday) {
        //Monday (1), Friday (5), Saturday (6) and Sunday (0)
        if ($includefriday && $jour_semaine == 5) {
          $ferie = true;
        }
        if ($includesaturday && $jour_semaine == 6) {
          $ferie = true;
        }
        if ($includesunday && $jour_semaine == 0) {
          $ferie = true;
        }
        if ($includemonday && $jour_semaine == 1) {
          $ferie = true;
        }
      }
    }
    //print "ferie afterincludexxxday=".$ferie."\n";
 
    // We increase the counter of non working day
    if ($ferie) {
      $nbFerie++;
    }
 
    // Increase number of days (on go up into loop)
    // Advance by exactly one GMT day. We can use += instead of dol_time_plus_duree() here because
    // inputs of this function are GMT dates (checked above), so a day
    // is always exactly 86400 seconds.
    //var_dump("before ".$jour.' '.$mois.' '.$annee.' '.$timestampStart);
    $timestampStart += 86400;
    //var_dump("after ".$jour.' '.$mois.' '.$annee.' '.$timestampStart);
 
    $i++;
  }
 
  //print "nbFerie=".$nbFerie."\n";
  return $nbFerie;
}
 
function listPublicHoliday($timestampStart, $timestampEnd, $countryCodeOrId = '', $lastday = 0, $excludesaturday = -1, $excludesunday = -1, $excludefriday = -1, $excludemonday = -1)
{
  global $conf, $db, $mysoc;
 
  // Check to ensure we use correct parameters
  if (($timestampEnd - $timestampStart) % 86400 != 0) {
    return 'Error Dates must use same hours and must be GMT dates';
  }
 
  if (empty($countryCodeOrId)) {
    $countryCodeOrId = $mysoc->country_code;
  }
  if ($excludemonday < 0) {
    $excludemonday = getDolGlobalInt('MAIN_NON_WORKING_DAYS_INCLUDE_MONDAY', 0);
  }
  if ($excludefriday < 0) {
    $excludefriday = getDolGlobalInt('MAIN_NON_WORKING_DAYS_INCLUDE_FRIDAY', 0);
  }
  if ($excludesaturday < 0) {
    $excludesaturday = getDolGlobalInt('MAIN_NON_WORKING_DAYS_INCLUDE_SATURDAY', 1);
  }
  if ($excludesunday < 0) {
    $excludesunday = getDolGlobalInt('MAIN_NON_WORKING_DAYS_INCLUDE_SUNDAY', 1);
  }
 
  if (is_numeric($countryCodeOrId)) {
    $country_id = $countryCodeOrId;
  } else {
    $country_id = dol_getIdFromCode($db, $countryCodeOrId, 'c_country', 'code', 'rowid');
  }
 
  if (empty($conf->cache['arrayOfActivePublicHolidays_' . $country_id])) {
    // Loop on public holiday defined into hrm_public_holiday for the day, month and year analyzed
    $tmpArrayOfPublicHolidays = array();
    $sql = "SELECT id, code, entity, fk_country, dayrule, year, month, day, active";
    $sql .= " FROM " . MAIN_DB_PREFIX . "c_hrm_public_holiday";
    $sql .= " WHERE active = 1 and fk_country IN (0" . ($country_id > 0 ? ", " . $country_id : 0) . ")";
    $sql .= " AND entity IN (0," . getEntity('holiday') . ")";
 
    $resql = $db->query($sql);
    if ($resql) {
      $num_rows = $db->num_rows($resql);
      $i = 0;
      while ($i < $num_rows) {
        $obj = $db->fetch_object($resql);
        $tmpArrayOfPublicHolidays[$obj->id] = array('dayrule' => $obj->dayrule, 'year' => $obj->year, 'month' => $obj->month, 'day' => $obj->day);
        $i++;
      }
    } else {
      dol_syslog($db->lasterror(), LOG_ERR);
      return 'Error sql ' . $db->lasterror();
    }
 
    //var_dump($tmpArrayOfPublicHolidays);
    $conf->cache['arrayOfActivePublicHolidays_' . $country_id] = $tmpArrayOfPublicHolidays;
  }
 
  $arrayOfPublicHolidays = $conf->cache['arrayOfActivePublicHolidays_' . $country_id];
  $listFeries = [];
  $i = 0;
  while ((($lastday == 0 && $timestampStart < $timestampEnd) || ($lastday && $timestampStart <= $timestampEnd))
    && ($i < 50000)) {        // Loop end when equals (Test on i is a security loop to avoid infinite loop)
    $nonWorkingDay = false;
    $ferie = false;
    $specialdayrule = array();
 
    $jour = (int) gmdate("d", $timestampStart);
    $mois = (int) gmdate("m", $timestampStart);
    $annee = (int) gmdate("Y", $timestampStart);
 
    // If we have to exclude Friday, Saturday and Sunday
    if ($excludefriday || $excludesaturday || $excludesunday) {
      $jour_julien = unixtojd($timestampStart);
      $jour_semaine = jddayofweek($jour_julien, 0);
      if ($excludefriday) {                    //Friday (5), Saturday (6) and Sunday (0)
        if ($jour_semaine == 5) {
          $nonWorkingDay = true;
        }
      }
      if ($excludesaturday) {                    //Friday (5), Saturday (6) and Sunday (0)
        if ($jour_semaine == 6) {
          $nonWorkingDay = true;
        }
      }
      if ($excludesunday) {                    //Friday (5), Saturday (6) and Sunday (0)
        if ($jour_semaine == 0) {
          $nonWorkingDay = true;
        }
      }
    }
    //print "ferie=".$nonWorkingDay."\n";
 
    if (!$nonWorkingDay) {
      //print "jour=".$jour." month=".$mois." year=".$annee." includesaturday=".$excludesaturday." includesunday=".$excludesunday."\n";
      foreach ($arrayOfPublicHolidays as $entrypublicholiday) {
        if (!empty($entrypublicholiday['dayrule']) && $entrypublicholiday['dayrule'] != 'date') {        // For example 'easter', '...'
          $specialdayrule[$entrypublicholiday['dayrule']] = $entrypublicholiday['dayrule'];
        } else {
          $match = 1;
          if (!empty($entrypublicholiday['year']) && $entrypublicholiday['year'] != $annee) {
            $match = 0;
          }
          if ($entrypublicholiday['month'] != $mois) {
            $match = 0;
          }
          if ($entrypublicholiday['day'] != $jour) {
            $match = 0;
          }
 
          if ($match) {
            $ferie = true;
            $listFeries[] = $timestampStart;
          }
        }
 
        $i++;
      }
      //var_dump($specialdayrule)."\n";
      //print "ferie=".$nonWorkingDay."\n";
    }
 
    if (!$nonWorkingDay && !$ferie) {
      // Special dayrules
      if (in_array('easter', $specialdayrule)) {
        // Calculation for easter date
        $date_paques = getGMTEasterDatetime($annee);
        $jour_paques = gmdate("d", $date_paques);
        $mois_paques = gmdate("m", $date_paques);
        if ($jour_paques == $jour && $mois_paques == $mois) {
          $ferie = true;
          $listFeries[] = $timestampStart;
        }
        // Easter (sunday)
      }
 
      if (in_array('eastermonday', $specialdayrule)) {
        // Calculation for the monday of easter date
        $date_paques = getGMTEasterDatetime($annee);
        //print 'PPP'.$date_paques.' '.dol_print_date($date_paques, 'dayhour', 'gmt')." ";
        $date_lundi_paques = $date_paques + (3600 * 24);
        $jour_lundi_paques = gmdate("d", $date_lundi_paques);
        $mois_lundi_paques = gmdate("m", $date_lundi_paques);
        if ($jour_lundi_paques == $jour && $mois_lundi_paques == $mois) {
          $ferie = true;
          $listFeries[] = $timestampStart;
        }
        // Easter (monday)
        //print 'annee='.$annee.' $jour='.$jour.' $mois='.$mois.' $jour_lundi_paques='.$jour_lundi_paques.' $mois_lundi_paques='.$mois_lundi_paques."\n";
      }
 
      //Good Friday
      if (in_array('goodfriday', $specialdayrule)) {
        // Pulls the date of Easter
        $easter = getGMTEasterDatetime($annee);
 
        // Calculates the date of Good Friday based on Easter
        $date_good_friday = $easter - (2 * 3600 * 24);
        $dom_good_friday = gmdate("d", $date_good_friday);
        $month_good_friday = gmdate("m", $date_good_friday);
 
        if ($dom_good_friday == $jour && $month_good_friday == $mois) {
          $ferie = true;
          $listFeries[] = $timestampStart;
        }
      }
 
      if (in_array('ascension', $specialdayrule)) {
        // Calcul du jour de l'ascension (39 days after easter day)
        $date_paques = getGMTEasterDatetime($annee);
        $date_ascension = $date_paques + (3600 * 24 * 39);
        $jour_ascension = gmdate("d", $date_ascension);
        $mois_ascension = gmdate("m", $date_ascension);
        if ($jour_ascension == $jour && $mois_ascension == $mois) {
          $ferie = true;
          $listFeries[] = $timestampStart;
        }
        // Ascension (thursday)
      }
 
      if (in_array('pentecost', $specialdayrule)) {
        // Calculation of "Pentecote" (49 days after easter day)
        $date_paques = getGMTEasterDatetime($annee);
        $date_pentecote = $date_paques + (3600 * 24 * 49);
        $jour_pentecote = gmdate("d", $date_pentecote);
        $mois_pentecote = gmdate("m", $date_pentecote);
        if ($jour_pentecote == $jour && $mois_pentecote == $mois) {
          $ferie = true;
          $listFeries[] = $timestampStart;
        }
        // "Pentecote" (sunday)
      }
 
      if (in_array('pentecotemonday', $specialdayrule)) {
        // Calculation of "Pentecote" (49 days after easter day)
        $date_paques = getGMTEasterDatetime($annee);
        $date_pentecote = $date_paques + (3600 * 24 * 50);
        $jour_pentecote = gmdate("d", $date_pentecote);
        $mois_pentecote = gmdate("m", $date_pentecote);
        if ($jour_pentecote == $jour && $mois_pentecote == $mois) {
          $ferie = true;
          $listFeries[] = $timestampStart;
        }
        // "Pentecote" (monday)
      }
 
      if (in_array('viernessanto', $specialdayrule)) {
        // Viernes Santo
        $date_paques = getGMTEasterDatetime($annee);
        $date_viernes = $date_paques - (3600 * 24 * 2);
        $jour_viernes = gmdate("d", $date_viernes);
        $mois_viernes = gmdate("m", $date_viernes);
        if ($jour_viernes == $jour && $mois_viernes == $mois) {
          $ferie = true;
          $listFeries[] = $timestampStart;
        }
        //Viernes Santo
      }
 
      if (in_array('fronleichnam', $specialdayrule)) {
        // Fronleichnam (60 days after easter sunday)
        $date_paques = getGMTEasterDatetime($annee);
        $date_fronleichnam = $date_paques + (3600 * 24 * 60);
        $jour_fronleichnam = gmdate("d", $date_fronleichnam);
        $mois_fronleichnam = gmdate("m", $date_fronleichnam);
        if ($jour_fronleichnam == $jour && $mois_fronleichnam == $mois) {
          $ferie = true;
          $listFeries[] = $timestampStart;
        }
        // Fronleichnam
      }
 
      if (in_array('genevafast', $specialdayrule)) {
        // Geneva fast in Switzerland (Thursday after the first sunday in September)
        $date_1sunsept = strtotime('next thursday', strtotime('next sunday', mktime(0, 0, 0, 9, 1, $annee)));
        $jour_1sunsept = date("d", $date_1sunsept);
        $mois_1sunsept = date("m", $date_1sunsept);
        if ($jour_1sunsept == $jour && $mois_1sunsept == $mois) {
          $ferie = true;
          $listFeries[] = $timestampStart;
        }
        // Geneva fast in Switzerland
      }
    }
    //print "ferie=".$nonWorkingDay."\n";
 
    // Increase number of days (on go up into loop)
    $timestampStart = dol_time_plus_duree($timestampStart, 1, 'd');
    //var_dump($jour.' '.$mois.' '.$annee.' '.$timestampStart);
 
    $i++;
  }
 
  //print "nbFerie=".$nbFerie."\n";
  return $listFeries;
}
 
function num_between_day($timestampStart, $timestampEnd, $lastday = 0)
{
  if ($timestampStart <= $timestampEnd) {
    if ($lastday == 1) {
      $bit = 0;
    } else {
      $bit = 1;
    }
    $nbjours = (int) floor(($timestampEnd - $timestampStart) / (60 * 60 * 24)) + 1 - $bit;
  } else {
    $nbjours = 0;
  }
  //print ($timestampEnd - $timestampStart) - $lastday;
  return $nbjours;
}
 
function num_open_day($timestampStart, $timestampEnd, $inhour = 0, $lastday = 0, $halfday = 0, $countryCodeOrId = '')
{
  global $langs, $mysoc;
 
  if (empty($countryCodeOrId) || $countryCodeOrId < 0) {
    $countryCodeOrId = $mysoc->country_code;
  }
 
  dol_syslog('num_open_day timestampStart='.$timestampStart.' timestampEnd='.$timestampEnd.' bit='.$lastday.' countryCodeOrId='.$countryCodeOrId);
 
  // Check parameters
  if (!is_int($timestampStart) && !is_float($timestampStart)) {
    return 'ErrorBadParameter_num_open_day';
  }
  if (!is_int($timestampEnd) && !is_float($timestampEnd)) {
    return 'ErrorBadParameter_num_open_day';
  }
 
  if ($timestampStart < $timestampEnd) {
    // --- 1. Calculate Gross Working Days ---
    // Gross working days = total days in range - non-working days (weekends & public holidays).
    $a = num_between_day($timestampStart, $timestampEnd, $lastday);
    $b = num_public_holiday($timestampStart, $timestampEnd, $countryCodeOrId, $lastday);
    $nbOpenDay = $a - $b;
 
    // --- 2. Apply Contextual Half-Day Deductions ---
    $halfday = (int) $halfday; // Ensure $halfday is an integer for reliable comparisons.
 
    // Check if start/end days are working days just ONCE to optimize performance
    // by avoiding redundant calls to the potentially slow num_public_holiday() function.
    // @phan-suppress-next-line PhanPluginSuspiciousParamPosition
    $isStartDayWorking = (num_public_holiday($timestampStart, $timestampStart, $countryCodeOrId, 1) == 0);
    // @phan-suppress-next-line PhanPluginSuspiciousParamPosition
    $isEndDayWorking   = (num_public_holiday($timestampEnd, $timestampEnd, $countryCodeOrId, 1) == 0);
 
    // Deduct 0.5 if the leave starts in the afternoon of a working day.
    if (($halfday == -1 || $halfday == 2) && $isStartDayWorking) {
      $nbOpenDay -= 0.5;
    }
 
    // Deduct 0.5 if the leave ends in the morning of a different, working day.
    if (($halfday == 1 || $halfday == 2) && date('Y-m-d', $timestampStart) != date('Y-m-d', $timestampEnd) && $isEndDayWorking) {
      $nbOpenDay -= 0.5;
    }
 
    // --- 3. Return Final Value ---
    if ($inhour == 1) {
      return $nbOpenDay * 24;
    }
 
    return $nbOpenDay;
  } elseif ($timestampStart == $timestampEnd) {
    $numholidays = 0;
    if ($lastday) {
      $numholidays = num_public_holiday($timestampStart, $timestampEnd, $countryCodeOrId, $lastday);
      if ($numholidays == 1) {
        return 0;
      }
    }
 
    $nbOpenDay = $lastday;
 
    if ($inhour == 1) {
      $nbOpenDay *= 24;
    }
    return $nbOpenDay - (($inhour == 1 ? 12 : 0.5) * abs($halfday));
  } else {
    return $langs->trans("Error");
  }
}
 
 
 
function monthArray($outputlangs, $short = 0)
{
  $montharray = array(
    1  => $outputlangs->trans("Month01"),
    2  => $outputlangs->trans("Month02"),
    3  => $outputlangs->trans("Month03"),
    4  => $outputlangs->trans("Month04"),
    5  => $outputlangs->trans("Month05"),
    6  => $outputlangs->trans("Month06"),
    7  => $outputlangs->trans("Month07"),
    8  => $outputlangs->trans("Month08"),
    9  => $outputlangs->trans("Month09"),
    10 => $outputlangs->trans("Month10"),
    11 => $outputlangs->trans("Month11"),
    12 => $outputlangs->trans("Month12")
  );
 
  if (!empty($short)) {
    $montharray = array(
      1  => $outputlangs->trans("MonthShort01"),
      2  => $outputlangs->trans("MonthShort02"),
      3  => $outputlangs->trans("MonthShort03"),
      4  => $outputlangs->trans("MonthShort04"),
      5  => $outputlangs->trans("MonthShort05"),
      6  => $outputlangs->trans("MonthShort06"),
      7  => $outputlangs->trans("MonthShort07"),
      8  => $outputlangs->trans("MonthShort08"),
      9  => $outputlangs->trans("MonthShort09"),
      10 => $outputlangs->trans("MonthShort10"),
      11 => $outputlangs->trans("MonthShort11"),
      12 => $outputlangs->trans("MonthShort12")
      );
  }
 
  return $montharray;
}
 
function getWeekNumbersOfMonth($month, $year)
{
  $nb_days = cal_days_in_month(CAL_GREGORIAN, $month, $year);
  $TWeek = array();
  for ($day = 1; $day <= $nb_days; $day++) {
    $week_number = getWeekNumber($day, $month, $year);
    $TWeek[$week_number] = $week_number;
  }
  return $TWeek;
}
 
function getFirstDayOfEachWeek($TWeek, $year)
{
  $TFirstDayOfWeek = array();
  // When a month overlaps 2 years, the weeks 52/53 of previous year and the week 01 of next year are present together in $TWeek.
  // If $TWeek starts with week 52 or 53 (a January), these first weeks belong to previous year.
  // If $TWeek ends with week 01 (a December), this last week belongs to next year.
  $startwithweeksofpreviousyear = ((int) reset($TWeek) >= 52 && in_array('01', $TWeek));
  foreach ($TWeek as $weekNb) {
    $yeartouse = $year;
    if ($startwithweeksofpreviousyear) {
      if ((int) $weekNb >= 52) {
        $yeartouse = $year - 1;
      }
    } elseif ($weekNb == '01' && in_array('52', $TWeek)) {
      $yeartouse = $year + 1;
    }
    $TFirstDayOfWeek[$weekNb] = date('d', strtotime($yeartouse.'W'.$weekNb));
  }
  return $TFirstDayOfWeek;
}
 
function getLastDayOfEachWeek($TWeek, $year)
{
  $TLastDayOfWeek = array();
  // Same rule as in getFirstDayOfEachWeek() to find the year each week belongs to
  $startwithweeksofpreviousyear = ((int) reset($TWeek) >= 52 && in_array('01', $TWeek));
  foreach ($TWeek as $weekNb) {
    $yeartouse = $year;
    if ($startwithweeksofpreviousyear) {
      if ((int) $weekNb >= 52) {
        $yeartouse = $year - 1;
      }
    } elseif ($weekNb == '01' && in_array('52', $TWeek)) {
      $yeartouse = $year + 1;
    }
    $TLastDayOfWeek[$weekNb] = date('d', strtotime($yeartouse.'W'.$weekNb.'+6 days'));
  }
  return $TLastDayOfWeek;
}
 
function getWeekNumber($day, $month, $year)
{
  $date = new DateTime($year.'-'.$month.'-'.$day);
  $week = $date->format("W");
  return $week;
}