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pradipchitrakar/NepaliToEnglishDateConverter.php

Created July 9, 2020 20:39
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Converts date in Bikram Sambat (B.S.) to A.D. and vice versa.
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NepaliToEnglishDateConverter.php
<?php
class NepaliDateConverter
{
// Data for nepali date
private $_bs = array(
0 => array(2000,30,32,31,32,31,30,30,30,29,30,29,31),
1 => array(2001,31,31,32,31,31,31,30,29,30,29,30,30),
2 => array(2002,31,31,32,32,31,30,30,29,30,29,30,30),
3 => array(2003,31,32,31,32,31,30,30,30,29,29,30,31),
4 => array(2004,30,32,31,32,31,30,30,30,29,30,29,31),
5 => array(2005,31,31,32,31,31,31,30,29,30,29,30,30),
6 => array(2006,31,31,32,32,31,30,30,29,30,29,30,30),
7 => array(2007,31,32,31,32,31,30,30,30,29,29,30,31),
8 => array(2008,31,31,31,32,31,31,29,30,30,29,29,31),
9 => array(2009,31,31,32,31,31,31,30,29,30,29,30,30),
10 => array(2010,31,31,32,32,31,30,30,29,30,29,30,30),
11 => array(2011,31,32,31,32,31,30,30,30,29,29,30,31),
12 => array(2012,31,31,31,32,31,31,29,30,30,29,30,30),
13 => array(2013,31,31,32,31,31,31,30,29,30,29,30,30),
14 => array(2014,31,31,32,32,31,30,30,29,30,29,30,30),
15 => array(2015,31,32,31,32,31,30,30,30,29,29,30,31),
16 => array(2016,31,31,31,32,31,31,29,30,30,29,30,30),
17 => array(2017,31,31,32,31,31,31,30,29,30,29,30,30),
18 => array(2018,31,32,31,32,31,30,30,29,30,29,30,30),
19 => array(2019,31,32,31,32,31,30,30,30,29,30,29,31),
20 => array(2020,31,31,31,32,31,31,30,29,30,29,30,30),
21 => array(2021,31,31,32,31,31,31,30,29,30,29,30,30),
22 => array(2022,31,32,31,32,31,30,30,30,29,29,30,30),
23 => array(2023,31,32,31,32,31,30,30,30,29,30,29,31),
24 => array(2024,31,31,31,32,31,31,30,29,30,29,30,30),
25 => array(2025,31,31,32,31,31,31,30,29,30,29,30,30),
26 => array(2026,31,32,31,32,31,30,30,30,29,29,30,31),
27 => array(2027,30,32,31,32,31,30,30,30,29,30,29,31),
28 => array(2028,31,31,32,31,31,31,30,29,30,29,30,30),
29 => array(2029,31,31,32,31,32,30,30,29,30,29,30,30),
30 => array(2030,31,32,31,32,31,30,30,30,29,29,30,31),
31 => array(2031,30,32,31,32,31,30,30,30,29,30,29,31),
32 => array(2032,31,31,32,31,31,31,30,29,30,29,30,30),
33 => array(2033,31,31,32,32,31,30,30,29,30,29,30,30),
34 => array(2034,31,32,31,32,31,30,30,30,29,29,30,31),
35 => array(2035,30,32,31,32,31,31,29,30,30,29,29,31),
36 => array(2036,31,31,32,31,31,31,30,29,30,29,30,30),
37 => array(2037,31,31,32,32,31,30,30,29,30,29,30,30),
38 => array(2038,31,32,31,32,31,30,30,30,29,29,30,31),
39 => array(2039,31,31,31,32,31,31,29,30,30,29,30,30),
40 => array(2040,31,31,32,31,31,31,30,29,30,29,30,30),
41 => array(2041,31,31,32,32,31,30,30,29,30,29,30,30),
42 => array(2042,31,32,31,32,31,30,30,30,29,29,30,31),
43 => array(2043,31,31,31,32,31,31,29,30,30,29,30,30),
44 => array(2044,31,31,32,31,31,31,30,29,30,29,30,30),
45 => array(2045,31,32,31,32,31,30,30,29,30,29,30,30),
46 => array(2046,31,32,31,32,31,30,30,30,29,29,30,31),
47 => array(2047,31,31,31,32,31,31,30,29,30,29,30,30),
48 => array(2048,31,31,32,31,31,31,30,29,30,29,30,30),
49 => array(2049,31,32,31,32,31,30,30,30,29,29,30,30),
50 => array(2050,31,32,31,32,31,30,30,30,29,30,29,31),
51 => array(2051,31,31,31,32,31,31,30,29,30,29,30,30),
52 => array(2052,31,31,32,31,31,31,30,29,30,29,30,30),
53 => array(2053,31,32,31,32,31,30,30,30,29,29,30,30),
54 => array(2054,31,32,31,32,31,30,30,30,29,30,29,31),
55 => array(2055,31,31,32,31,31,31,30,29,30,29,30,30),
56 => array(2056,31,31,32,31,32,30,30,29,30,29,30,30),
57 => array(2057,31,32,31,32,31,30,30,30,29,29,30,31),
58 => array(2058,30,32,31,32,31,30,30,30,29,30,29,31),
59 => array(2059,31,31,32,31,31,31,30,29,30,29,30,30),
60 => array(2060,31,31,32,32,31,30,30,29,30,29,30,30),
61 => array(2061,31,32,31,32,31,30,30,30,29,29,30,31),
62 => array(2062,30,32,31,32,31,31,29,30,29,30,29,31),
63 => array(2063,31,31,32,31,31,31,30,29,30,29,30,30),
64 => array(2064,31,31,32,32,31,30,30,29,30,29,30,30),
65 => array(2065,31,32,31,32,31,30,30,30,29,29,30,31),
66 => array(2066,31,31,31,32,31,31,29,30,30,29,29,31),
67 => array(2067,31,31,32,31,31,31,30,29,30,29,30,30),
68 => array(2068,31,31,32,32,31,30,30,29,30,29,30,30),
69 => array(2069,31,32,31,32,31,30,30,30,29,29,30,31),
70 => array(2070,31,31,31,32,31,31,29,30,30,29,30,30),
71 => array(2071,31,31,32,31,31,31,30,29,30,29,30,30),
72 => array(2072,31,32,31,32,31,30,30,29,30,29,30,30),
73 => array(2073,31,32,31,32,31,30,30,30,29,29,30,31),
74 => array(2074,31,31,31,32,31,31,30,29,30,29,30,30),
75 => array(2075,31,31,32,31,31,31,30,29,30,29,30,30),
76 => array(2076,31,32,31,32,31,30,30,30,29,29,30,30),
77 => array(2077,31,32,31,32,31,30,30,30,29,30,29,31),
78 => array(2078,31,31,31,32,31,31,30,29,30,29,30,30),
79 => array(2079,31,31,32,31,31,31,30,29,30,29,30,30),
80 => array(2080,31,32,31,32,31,30,30,30,29,29,30,30),
81 => array(2081,31,31,32,32,31,30,30,30,29,30,30,30),
82 => array(2082,30,32,31,32,31,30,30,30,29,30,30,30),
83 => array(2083,31,31,32,31,31,30,30,30,29,30,30,30),
84 => array(2084,31,31,32,31,31,30,30,30,29,30,30,30),
85 => array(2085,31,32,31,32,30,31,30,30,29,30,30,30),
86 => array(2086,30,32,31,32,31,30,30,30,29,30,30,30),
87 => array(2087,31,31,32,31,31,31,30,30,29,30,30,30),
88 => array(2088,30,31,32,32,30,31,30,30,29,30,30,30),
89 => array(2089,30,32,31,32,31,30,30,30,29,30,30,30),
90 => array(2090,30,32,31,32,31,30,30,30,29,30,30,30),
91 =>array(2091,31,31,32,31,31,31,30,30,29,30,30,30),
92 => array(2092,31,31,32,32,31,30,30,30,29,30,30,30)
);
private $_nep_date = array('year' => '', 'month' => '', 'date' => '', 'day' => '', 'nmonth' => '', 'num_day' => '');
private $_eng_date = array('year' => '', 'month' => '', 'date' => '', 'day' => '', 'emonth' => '', 'num_day' => '');
public $debug_info = "";
/**
* Return day
*
* @param int $day
* @return string
*/
private function _get_day_of_week($day)
{
switch ($day)
{
case 1:
$day = "Sunday";
break;
case 2:
$day = "Monday";
break;
case 3:
$day = "Tuesday";
break;
case 4:
$day = "Wednesday";
break;
case 5:
$day = "Thursday";
break;
case 6:
$day = "Friday";
break;
case 7:
$day = "Saturday";
break;
}
return $day;
}
/**
* Return english month name
*
* @param int $m
* @return string
*/
private function _get_english_month($m)
{
$eMonth = FALSE;
switch ($m)
{
case 1:
$eMonth = "January";
break;
case 2:
$eMonth = "February";
break;
case 3:
$eMonth = "March";
break;
case 4:
$eMonth = "April";
break;
case 5:
$eMonth = "May";
break;
case 6:
$eMonth = "June";
break;
case 7:
$eMonth = "July";
break;
case 8:
$eMonth = "August";
break;
case 9:
$eMonth = "September";
break;
case 10:
$eMonth = "October";
break;
case 11:
$eMonth = "November";
break;
case 12:
$eMonth = "December";
}
return $eMonth;
}
/**
* Return nepali month name
*
* @param int $m
* @return string
*/
private function _get_nepali_month($m)
{
$n_month = FALSE;
switch ($m)
{
case 1:
$n_month = "Baishak";
break;
case 2:
$n_month = "Jestha";
break;
case 3:
$n_month = "Ashad";
break;
case 4:
$n_month = "Shrawn";
break;
case 5:
$n_month = "Bhadra";
break;
case 6:
$n_month = "Ashwin";
break;
case 7:
$n_month = "kartik";
break;
case 8:
$n_month = "Mangshir";
break;
case 9:
$n_month = "Poush";
break;
case 10:
$n_month = "Magh";
break;
case 11:
$n_month = "Falgun";
break;
case 12:
$n_month = "Chaitra";
break;
}
return $n_month;
}
/**
* Check if date range is in english
*
* @param int $yy
* @param int $mm
* @param int $dd
* @return bool
*/
private function _is_in_range_eng($yy, $mm, $dd)
{
if ($yy < 1944 || $yy > 2033)
{
return 'Supported only between 1944-2022';
}
if ($mm < 1 || $mm > 12)
{
return 'Error! month value can be between 1-12 only';
}
if ($dd < 1 || $dd > 31)
{
return 'Error! day value can be between 1-31 only';
}
return TRUE;
}
/**
* Check if date is with in nepali data range
*
* @param int $yy
* @param int $mm
* @param int $dd
* @return bool
*/
private function _is_in_range_nep($yy, $mm, $dd)
{
if ($yy < 2000 || $yy > 2089)
{
return 'Supported only between 2000-2089';
return false;
}
if ($mm < 1 || $mm > 12)
{
return 'Error! month value can be between 1-12 only';
}
if ($dd < 1 || $dd > 32)
{
return 'Error! day value can be between 1-31 only';
}
return TRUE;
}
/**
* Calculates wheather english year is leap year or not
*
* @param int $year
* @return bool
*/
public function is_leap_year($year)
{
$a = $year;
if ($a % 100 == 0)
{
if ($a % 400 == 0)
{
return TRUE;
}
else
{
return FALSE;
}
}
else
{
if ($a % 4 == 0)
{
return TRUE;
}
else
{
return FALSE;
}
}
}
/**
* currently can only calculate the date between AD 1944-2033...
*
* @param int $yy
* @param int $mm
* @param int $dd
* @return array
*/
public function eng_to_nep($yy, $mm, $dd)
{
// Check for date range
$chk = $this->_is_in_range_eng($yy, $mm, $dd);
if($chk !== TRUE)
{
//throw new HttpException(500, "Invalid Date");
//die($chk);
return false;
}
else
{
// Month data.
$month = array(31, 28, 31, 30, 31, 30, 31, 31, 30, 31, 30, 31);
// Month for leap year
$lmonth = array(31, 29, 31, 30, 31, 30, 31, 31, 30, 31, 30, 31);
$def_eyy = 1944; // initial english date.
$def_nyy = 2000;
$def_nmm = 9;
$def_ndd = 17 - 1; // inital nepali date.
$total_eDays = 0;
$total_nDays = 0;
$a = 0;
$day = 7 - 1;
$m = 0;
$y = 0;
$i = 0;
$j = 0;
$numDay = 0;
// Count total no. of days in-terms year
for ($i = 0; $i < ($yy - $def_eyy); $i++) //total days for month calculation...(english)
{
if ($this->is_leap_year($def_eyy + $i) === TRUE)
{
for ($j = 0; $j < 12; $j++)
{
$total_eDays += $lmonth[$j];
}
}
else
{
for ($j = 0; $j < 12; $j++)
{
$total_eDays += $month[$j];
}
}
}
// Count total no. of days in-terms of month
for ($i = 0; $i < ($mm - 1); $i++)
{
if ($this->is_leap_year($yy) === TRUE)
{
$total_eDays += $lmonth[$i];
}
else
{
$total_eDays += $month[$i];
}
}
// Count total no. of days in-terms of date
$total_eDays += $dd;
$i = 0;
$j = $def_nmm;
$total_nDays = $def_ndd;
$m = $def_nmm;
$y = $def_nyy;
// Count nepali date from array
while ($total_eDays != 0)
{
$a = $this->_bs[$i][$j];
$total_nDays++; //count the days
$day++; //count the days interms of 7 days
if ($total_nDays > $a)
{
$m++;
$total_nDays = 1;
$j++;
}
if ($day > 7)
{
$day = 1;
}
if ($m > 12)
{
$y++;
$m = 1;
}
if ($j > 12)
{
$j = 1;
$i++;
}
$total_eDays--;
}
$numDay = $day;
$this->_nep_date['year'] = $y;
$this->_nep_date['month'] = $m;
$this->_nep_date['date'] = $total_nDays;
$this->_nep_date['day'] = $this->_get_day_of_week($day);
$this->_nep_date['nmonth'] = $this->_get_nepali_month($m);
$this->_nep_date['num_day'] = $numDay;
return $this->_nep_date;
}
}
/**
* Currently can only calculate the date between BS 2000-2089
*
* @param int $yy
* @param int $mm
* @param int $dd
* @return array
*/
public function nep_to_eng($yy, $mm, $dd)
{
$def_eyy = 1943;
$def_emm = 4;
$def_edd = 14 - 1; // initial english date.
$def_nyy = 2000;
$def_nmm = 1;
$def_ndd = 1; // iniital equivalent nepali date.
$total_eDays = 0;
$total_nDays = 0;
$a = 0;
$day = 4 - 1;
$m = 0;
$y = 0;
$i = 0;
$k = 0;
$numDay = 0;
$month = array(
0,
31,
28,
31,
30,
31,
30,
31,
31,
30,
31,
30,
31
);
$lmonth = array(
0,
31,
29,
31,
30,
31,
30,
31,
31,
30,
31,
30,
31
);
// Check for date range
$chk = $this->_is_in_range_nep($yy, $mm, $dd);
if ( $chk !== TRUE)
{
//die($chk);
//throw new HttpException(500, "Invalid Date");
return false;
}
else
{
// Count total days in-terms of year
for ($i = 0; $i < ($yy - $def_nyy); $i++)
{
for ($j = 1; $j <= 12; $j++)
{
$total_nDays += $this->_bs[$k][$j];
}
$k++;
}
// Count total days in-terms of month
for ($j = 1; $j < $mm; $j++)
{
$total_nDays += $this->_bs[$k][$j];
}
// Count total days in-terms of dat
$total_nDays += $dd;
// Calculation of equivalent english date...
$total_eDays = $def_edd;
$m = $def_emm;
$y = $def_eyy;
while ($total_nDays != 0)
{
if ($this->is_leap_year($y))
{
$a = $lmonth[$m];
}
else
{
$a = $month[$m];
}
$total_eDays++;
$day++;
if ($total_eDays > $a)
{
$m++;
$total_eDays = 1;
if ($m > 12)
{
$y++;
$m = 1;
}
}
if ($day > 7)
{
$day = 1;
}
$total_nDays--;
}
$numDay = $day;
$this->_eng_date['year'] = $y;
$this->_eng_date['month'] = $m;
$this->_eng_date['date'] = $total_eDays;
$this->_eng_date['day'] = $this->_get_day_of_week($day);
$this->_eng_date['nmonth'] = $this->_get_english_month($m);
$this->_eng_date['num_day'] = $numDay;
return $this->_eng_date;
}
}
}
// Example:
// $cal = new Nepali_Calendar();
// print_r ($cal->eng_to_nep(2008,11,23));
// print_r($cal->nep_to_eng(2065,8,8));
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