2 /**********************************************************************
3 Copyright (C) FrontAccounting, LLC.
4 Released under the terms of the GNU General Public License, GPL,
5 as published by the Free Software Foundation, either version 3
6 of the License, or (at your option) any later version.
7 This program is distributed in the hope that it will be useful,
8 but WITHOUT ANY WARRANTY; without even the implied warranty of
9 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
10 See the License here <http://www.gnu.org/licenses/gpl-3.0.html>.
11 ***********************************************************************/
13 date validation and parsing functions
15 These functions refer to the global variable defining the date format
16 The date format is defined in config.php called dateformats
17 this can be a string either "d/m/Y" for UK/Australia/New Zealand dates or
18 "m/d/Y" for US/Canada format dates depending on setting in preferences.
22 function __date($year, $month, $day)
24 global $dateseps, $tmonths;
26 $how = user_date_format();
27 $sep = $dateseps[user_date_sep()];
38 return $month.$sep.$day.$sep.$year;
40 return $day.$sep.$month.$sep.$year;
42 return $year.$sep.$month.$sep.$day;
44 return $tmonths[$month].$sep.$day.$sep.$year;
46 return $day.$sep.$tmonths[$month].$sep.$year;
48 return $year.$sep.$tmonths[$month].$sep.$day;
51 function is_date($date_)
55 if ($date_ == null || $date_ == "")
57 $how = user_date_format();
58 $sep = $dateseps[user_date_sep()];
60 $date_ = trim($date_);
61 $date = str_replace($sep, "", $date_);
66 $dd = explode($sep, $date_);
70 $month = array_search($dd[0], $tmonths);
76 $month = array_search($dd[1], $tmonths);
82 $month = array_search($dd[1], $tmonths);
88 elseif (strlen($date) == 6)
92 $day = substr($date,2,2);
93 $month = substr($date,0,2);
94 $year = substr($date,4,2);
98 $day = substr($date,0,2);
99 $month = substr($date,2,2);
100 $year = substr($date,4,2);
104 $day = substr($date,4,2);
105 $month = substr($date,2,2);
106 $year = substr($date,0,2);
109 elseif (strlen($date) == 8)
113 $day = substr($date,2,2);
114 $month = substr($date,0,2);
115 $year = substr($date,4,4);
119 $day = substr($date,0,2);
120 $month = substr($date,2,2);
121 $year = substr($date,4,4);
125 $day = substr($date,6,2);
126 $month = substr($date,4,2);
127 $year = substr($date,0,4);
130 if (!isset($year)|| (int)$year > 9999)
135 if (is_long((int)$day) && is_long((int)$month) && is_long((int)$year))
138 if ($date_system == 1)
139 list($year, $month, $day) = jalali_to_gregorian($year, $month, $day);
140 elseif ($date_system == 2)
141 list($year, $month, $day) = islamic_to_gregorian($year, $month, $day);
142 if (checkdate((int)$month, (int)$day, (int)$year))
152 { /*Can't be in an appropriate DefaultDateFormat */
155 } //end of is_date function
164 if ($date_system == 1)
165 list($year, $month, $day) = gregorian_to_jalali($year, $month, $day);
166 elseif ($date_system == 2)
167 list($year, $month, $day) = gregorian_to_islamic($year, $month, $day);
168 return __date($year, $month, $day);
173 if (user_date_format() == 0)
174 return date("h:i a");
179 // Retrieve and optionaly set default date for new document.
181 function new_doc_date($date=null)
183 if (isset($date) && $date != '')
184 $_SESSION['_default_date'] = $date;
186 if (!isset($_SESSION['_default_date']) || !sticky_doc_date())
187 $_SESSION['_default_date'] = Today();
189 return $_SESSION['_default_date'];
192 function is_date_in_fiscalyear($date, $convert=false)
194 global $path_to_root;
195 include_once($path_to_root . "/admin/db/fiscalyears_db.inc");
198 $date2 = sql2date($date);
202 if (user_check_access('SA_MULTIFISCALYEARS')) // allow all open years for this one
203 return is_date_in_fiscalyears($date2, false);
205 if (is_date_closed($date2))
207 $myrow = get_current_fiscalyear();
208 $begin = sql2date($myrow['begin']);
209 $end = sql2date($myrow['end']);
210 if (date1_greater_date2($begin, $date2) || date1_greater_date2($date2, $end))
217 function is_date_closed($date)
219 return !date1_greater_date2($date, sql2date(get_company_pref('gl_closing_date')));
222 function begin_fiscalyear()
224 global $path_to_root;
225 include_once($path_to_root . "/admin/db/fiscalyears_db.inc");
227 $myrow = get_current_fiscalyear();
228 return sql2date($myrow['begin']);
231 function end_fiscalyear()
233 global $path_to_root;
234 include_once($path_to_root . "/admin/db/fiscalyears_db.inc");
236 $myrow = get_current_fiscalyear();
237 return sql2date($myrow['end']);
240 function begin_month($date)
243 list($day, $month, $year) = explode_date_to_dmy($date);
244 if ($date_system == 1)
245 list($year, $month, $day) = gregorian_to_jalali($year, $month, $day);
246 elseif ($date_system == 2)
247 list($year, $month, $day) = gregorian_to_islamic($year, $month, $day);
248 return __date($year, $month, 1);
251 function days_in_month($month, $year)
255 if ($date_system == 1)
257 $days_in_month = array(31, 31, 31, 31, 31, 31, 30, 30, 30, 30, 30, ((((((($year - (($year > 0) ? 474 : 473)) % 2820) + 474) + 38) * 682) % 2816) < 682 ? 30 : 29));
259 elseif ($date_system == 2)
261 $days_in_month = array(30, 29, 30, 29, 30, 29, 30, 29, 30, 29, 30, (((((11 * $year) + 14) % 30) < 11) ? 30 : 29));
263 else // gregorian date
264 $days_in_month = array(31, ((!($year % 4 ) && (($year % 100) || !($year % 400)))?29:28), 31, 30, 31, 30, 31, 31, 30, 31, 30, 31);
266 return $days_in_month[$month - 1];
269 function end_month($date)
273 list($day, $month, $year) = explode_date_to_dmy($date);
274 if ($date_system == 1)
276 list($year, $month, $day) = gregorian_to_jalali($year, $month, $day);
278 elseif ($date_system == 2)
280 list($year, $month, $day) = gregorian_to_islamic($year, $month, $day);
283 return __date($year, $month, days_in_month($month, $year));
286 function add_days($date, $days) // accepts negative values as well
289 list($day, $month, $year) = explode_date_to_dmy($date);
290 $timet = mktime(0,0,0, $month, $day + $days, $year);
291 if ($date_system == 1 || $date_system == 2)
293 if ($date_system == 1)
294 list($year, $month, $day) = gregorian_to_jalali(date("Y", $timet), date("n", $timet), date("j", $timet));
295 elseif ($date_system == 2)
296 list($year, $month, $day) = gregorian_to_islamic(date("Y", $timet), date("n", $timet), date("j", $timet));
297 return __date($year, $month, $day);
299 list($year, $month, $day) = explode("-", date("Y-m-d", $timet));
300 return __date($year, $month, $day);
303 function add_months($date, $months) // accepts negative values as well
306 list($day, $month, $year) = explode_date_to_dmy($date);
308 $months += $year*12+$month;
309 $month = ($months-1)%12+1;
310 $year = ($months-$month)/12;
312 $timet = mktime(0,0,0, $month, min($day, days_in_month($month, $year)), $year);
314 if ($date_system == 1 || $date_system == 2)
316 if ($date_system == 1)
317 list($year, $month, $day) = gregorian_to_jalali(date("Y", $timet), date("n", $timet), date("j", $timet));
318 elseif ($date_system == 2)
319 list($year, $month, $day) = gregorian_to_islamic(date("Y", $timet), date("n", $timet), date("j", $timet));
320 return __date($year, $month, $day);
322 list($year, $month, $day) = explode("-", date("Y-m-d", $timet));
323 return __date($year, $month, $day);
326 function add_years($date, $years) // accepts negative values as well
329 list($day, $month, $year) = explode_date_to_dmy($date);
330 $timet = Mktime(0,0,0, $month, $day, $year + $years);
331 if ($date_system == 1 || $date_system == 2)
333 if ($date_system == 1)
334 list($year, $month, $day) = gregorian_to_jalali(date("Y", $timet), date("n", $timet), date("j", $timet));
335 elseif ($date_system == 2)
336 list($year, $month, $day) = gregorian_to_islamic(date("Y", $timet), date("n", $timet), date("j", $timet));
337 return __date($year, $month, $day);
339 list($year, $month, $day) = explode("-", date("Y-m-d", $timet));
340 return __date($year, $month, $day);
343 //_______________________________________________________________
345 function sql2date($date_)
349 //for MySQL dates are in the format YYYY-mm-dd
351 if (strpos($date_, "/"))
352 { // In MySQL it could be either / or -
353 list($year, $month, $day) = explode("/", $date_);
355 elseif (strpos ($date_, "-"))
357 list($year, $month, $day) = explode("-", $date_);
359 if (!isset($day)) // data format error
362 if (strlen($day) > 4)
363 { /*chop off the time stuff */
364 $day = substr($day, 0, 2);
366 if ($date_system == 1)
367 list($year, $month, $day) = gregorian_to_jalali($year, $month, $day);
368 elseif ($date_system == 2)
369 list($year, $month, $day) = gregorian_to_islamic($year, $month, $day);
370 return __date($year, $month, $day);
371 } // end function sql2date
374 function date2sql($date_)
376 global $dateseps, $date_system, $tmonths;
377 /* takes a date in a the format specified in $DefaultDateFormat
378 and converts to a yyyy/mm/dd format */
380 $how = user_date_format();
381 $sep = $dateseps[user_date_sep()];
383 if ($date_ == null || strlen($date_) == 0)
386 $date_ = trim($date_);
387 $year = $month = $day = 0;
388 // Split up the date by the separator based on "how" to split it
389 if ($how == 0 || $how == 3) // MMDDYYYY or MmmDDYYYY
390 list($month, $day, $year) = explode($sep, $date_);
391 elseif ($how == 1 || $how == 4) // DDMMYYYY or DDMmYYYY
392 list($day, $month, $year) = explode($sep, $date_);
393 else // $how == 2 || $how == 5, YYYYMMDD or YYYYMmmDD
394 list($year, $month, $day) = explode($sep, $date_);
398 $month = array_search($month, $tmonths);
400 //to modify assumption in 2030
401 if ($date_system == 0 || $date_system == 3)
407 elseif ((int)$year > 59 && (int)$year < 100)
412 if ((int)$year > 9999)
416 if ($date_system == 1)
417 list($year, $month, $day) = jalali_to_gregorian($year, $month, $day);
418 elseif ($date_system == 2)
419 list($year, $month, $day) = islamic_to_gregorian($year, $month, $day);
421 return sprintf("%04d-%02d-%02d", $year, $month, $day);
424 function date1_greater_date2 ($date1, $date2)
427 /* returns 1 true if date1 is greater than date_ 2 */
429 $date1 = date2sql($date1);
430 $date2 = date2sql($date2);
432 @list($year1, $month1, $day1) = explode("-", $date1);
433 @list($year2, $month2, $day2) = explode("-", $date2);
439 elseif ($year1 == $year2)
441 if ($month1 > $month2)
445 elseif ($month1 == $month2)
457 function date_diff2 ($date1, $date2, $period)
460 /* expects dates in the format specified in $DefaultDateFormat - period can be one of 'd','w','y','m'
461 months are assumed to be 30 days and years 365.25 days This only works
462 provided that both dates are after 1970. Also only works for dates up to the year 2035 ish */
464 $date1 = date2sql($date1);
465 $date2 = date2sql($date2);
466 list($year1, $month1, $day1) = explode("-", $date1);
467 list($year2, $month2, $day2) = explode("-", $date2);
469 $stamp1 = mktime(0,0,0, (int)$month1, (int)$day1, (int)$year1);
470 $stamp2 = mktime(0,0,0, (int)$month2, (int)$day2, (int)$year2);
471 $difference = $stamp1 - $stamp2;
473 /* difference is the number of seconds between each date negative if date_ 2 > date_ 1 */
478 return (int)($difference / (24 * 60 * 60));
480 return (int)($difference / (24 * 60 * 60 * 7));
482 return (int)($difference / (24 * 60 * 60 * 30));
486 return (int)($difference / (24 * 60 * 60 * 365.25));
492 function explode_date_to_dmy($date_)
494 $date = date2sql($date_);
499 list($year, $month, $day) = explode("-", $date);
500 return array($day, $month, $year);
505 return (int) ($a / $b);
507 /* Based on convertor to and from Gregorian and Jalali calendars.
508 Copyright (C) 2000 Roozbeh Pournader and Mohammad Toossi
509 Released under GNU General Public License */
511 function gregorian_to_jalali ($g_y, $g_m, $g_d)
513 $g_days_in_month = array(31, 28, 31, 30, 31, 30, 31, 31, 30, 31, 30, 31);
514 $j_days_in_month = array(31, 31, 31, 31, 31, 31, 30, 30, 30, 30, 30, 29);
520 $g_day_no = 365 * $gy + div($gy + 3, 4) - div($gy + 99, 100) + div($gy + 399, 400);
522 for ($i = 0; $i < $gm; ++$i)
523 $g_day_no += $g_days_in_month[$i];
524 if ($gm > 1 && (($gy % 4 == 0 && $gy % 100 != 0) || ($gy % 400 == 0)))
525 /* leap and after Feb */
528 $j_day_no = $g_day_no - 79;
530 $j_np = div($j_day_no, 12053); /* 12053 = 365*33 + 32/4 */
533 $jy = 979 + 33 * $j_np + 4 * div($j_day_no, 1461); /* 1461 = 365*4 + 4/4 */
537 if ($j_day_no >= 366)
539 $jy += div($j_day_no - 1, 365);
540 $j_day_no = ($j_day_no - 1) % 365;
543 for ($i = 0; $i < 11 && $j_day_no >= $j_days_in_month[$i]; ++$i)
544 $j_day_no -= $j_days_in_month[$i];
548 return array($jy, $jm, $jd);
551 function jalali_to_gregorian($j_y, $j_m, $j_d)
553 $g_days_in_month = array(31, 28, 31, 30, 31, 30, 31, 31, 30, 31, 30, 31);
554 $j_days_in_month = array(31, 31, 31, 31, 31, 31, 30, 30, 30, 30, 30, 29);
560 $j_day_no = 365 * $jy + div($jy, 33) * 8 + div($jy % 33 + 3, 4);
561 for ($i = 0; $i < $jm; ++$i)
562 $j_day_no += $j_days_in_month[$i];
566 $g_day_no = $j_day_no + 79;
568 $gy = 1600 + 400 * div($g_day_no, 146097); /* 146097 = 365*400 + 400/4 - 400/100 + 400/400 */
572 if ($g_day_no >= 36525) /* 36525 = 365*100 + 100/4 */
575 $gy += 100 * div($g_day_no, 36524); /* 36524 = 365*100 + 100/4 - 100/100 */
578 if ($g_day_no >= 365)
584 $gy += 4 * div($g_day_no, 1461); /* 1461 = 365*4 + 4/4 */
587 if ($g_day_no >= 366)
592 $gy += div($g_day_no, 365);
596 for ($i = 0; $g_day_no >= $g_days_in_month[$i] + ($i == 1 && $leap); $i++)
597 $g_day_no -= $g_days_in_month[$i] + ($i == 1 && $leap);
601 return array($gy, $gm, $gd);
603 /* Based on Hidri Date Script
604 Released under GNU General Public License */
605 function gregorian_to_islamic($g_y, $g_m, $g_d)
610 if (($y > 1582) || (($y == 1582) && ($m > 10)) || (($y == 1582) &&
611 ($m == 10) && ($d > 14)))
613 $jd = (int)((1461 * ($y + 4800 + (int)(($m - 14) / 12)))/ 4) +
614 (int)((367 * ($m - 2 - 12 * ((int)(($m - 14) / 12)))) / 12) -
615 (int)((3 * ((int)(($y + 4900 + (int)(($m - 14) / 12)) / 100))) / 4) + $d - 32075;
619 $jd = 367 * $y - (int)((7 * ($y + 5001 + (int)(($m - 9) / 7))) / 4) +
620 (int)((275 * $m) / 9) + $d + 1729777;
622 $l = $jd - 1948440 + 10632;
623 $n = (int)(($l - 1) / 10631);
624 $l = $l - 10631 * $n + 354;
625 $j = ((int)((10985 - $l) / 5316)) * ((int)((50 * $l) / 17719)) +
626 ((int)($l / 5670)) * ((int)((43 * $l) / 15238));
627 $l = $l - ((int)((30 - $j) / 15)) * ((int)((17719 * $j) / 50)) -
628 ((int)($j / 16)) * ((int)((15238 * $j) / 43)) + 29;
629 $m = (int)((24 * $l) / 709);
630 $d = $l - (int)((709 * $m) / 24);
631 $y = 30 * $n + $j - 30;
632 return array($y, $m, $d);
635 function islamic_to_gregorian($i_y, $i_m, $i_d)
641 $jd = (int)((11 * $y + 3) / 30) + 354 * $y + 30 * $m - (int)(($m - 1) / 2) + $d + 1948440 - 385;
645 $n = (int)((4 * $l) / 146097);
646 $l = $l - (int)((146097 * $n + 3) / 4);
647 $i = (int)((4000 * ($l + 1)) / 1461001);
648 $l = $l - (int)((1461 * $i) / 4) + 31;
649 $j = (int)((80 * $l) / 2447);
650 $d = $l - (int)((2447 * $j) / 80);
652 $m = $j + 2 - 12 * $l;
653 $y = 100 * ($n - 49) + $i + $l;
658 $k = (int)(($j - 1) / 1461);
660 $n = (int)(($l - 1) / 365) - (int)($l / 1461);
661 $i = $l - 365 * $n + 30;
662 $j = (int)((80 * $i) / 2447);
663 $d = $i - (int)((2447 * $j) / 80);
665 $m = $j + 2 - 12 * $i;
666 $y = 4 * $k + $n + $i - 4716;
668 return array($y, $m, $d);