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 $SysPrefs, $tmonths;
26 $how = user_date_format();
27 $sep = $SysPrefs->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 = $SysPrefs->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)$year))
138 if ($SysPrefs->date_system == 1)
139 list($year, $month, $day) = jalali_to_gregorian($year, $month, $day);
140 elseif ($SysPrefs->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 ($SysPrefs->date_system == 1)
165 list($year, $month, $day) = gregorian_to_jalali($year, $month, $day);
166 elseif ($SysPrefs->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 (is_date_closed($date2))
205 if (user_check_access('SA_MULTIFISCALYEARS')) // allow all open years for this one
206 return is_date_in_fiscalyears($date2, false);
208 $myrow = get_current_fiscalyear();
209 $begin = sql2date($myrow['begin']);
210 $end = sql2date($myrow['end']);
211 if (date1_greater_date2($begin, $date2) || date1_greater_date2($date2, $end))
218 function is_date_closed($date)
220 return !date1_greater_date2($date, sql2date(get_company_pref('gl_closing_date')));
223 function begin_fiscalyear()
225 global $path_to_root;
226 include_once($path_to_root . "/admin/db/fiscalyears_db.inc");
228 $myrow = get_current_fiscalyear();
229 return sql2date($myrow['begin']);
232 function end_fiscalyear()
234 global $path_to_root;
235 include_once($path_to_root . "/admin/db/fiscalyears_db.inc");
237 $myrow = get_current_fiscalyear();
238 return sql2date($myrow['end']);
241 function begin_month($date)
244 list($day, $month, $year) = explode_date_to_dmy($date);
245 if ($SysPrefs->date_system == 1)
246 list($year, $month, $day) = gregorian_to_jalali($year, $month, $day);
247 elseif ($SysPrefs->date_system == 2)
248 list($year, $month, $day) = gregorian_to_islamic($year, $month, $day);
249 return __date($year, $month, 1);
252 function days_in_month($month, $year)
256 if ($SysPrefs->date_system == 1)
258 $days_in_month = array(31, 31, 31, 31, 31, 31, 30, 30, 30, 30, 30, ((((((($year - (($year > 0) ? 474 : 473)) % 2820) + 474) + 38) * 682) % 2816) < 682 ? 30 : 29));
260 elseif ($SysPrefs->date_system == 2)
262 $days_in_month = array(30, 29, 30, 29, 30, 29, 30, 29, 30, 29, 30, (((((11 * $year) + 14) % 30) < 11) ? 30 : 29));
264 else // gregorian date
265 $days_in_month = array(31, ((!($year % 4 ) && (($year % 100) || !($year % 400)))?29:28), 31, 30, 31, 30, 31, 31, 30, 31, 30, 31);
267 return $days_in_month[$month - 1];
270 function end_month($date)
274 list($day, $month, $year) = explode_date_to_dmy($date);
275 if ($SysPrefs->date_system == 1)
277 list($year, $month, $day) = gregorian_to_jalali($year, $month, $day);
279 elseif ($SysPrefs->date_system == 2)
281 list($year, $month, $day) = gregorian_to_islamic($year, $month, $day);
284 return __date($year, $month, days_in_month($month, $year));
287 function add_days($date, $days) // accepts negative values as well
290 list($day, $month, $year) = explode_date_to_dmy($date);
291 $timet = mktime(0,0,0, $month, $day + $days, $year);
292 if ($SysPrefs->date_system == 1 || $SysPrefs->date_system == 2)
294 if ($SysPrefs->date_system == 1)
295 list($year, $month, $day) = gregorian_to_jalali(date("Y", $timet), date("n", $timet), date("j", $timet));
296 elseif ($SysPrefs->date_system == 2)
297 list($year, $month, $day) = gregorian_to_islamic(date("Y", $timet), date("n", $timet), date("j", $timet));
298 return __date($year, $month, $day);
300 list($year, $month, $day) = explode("-", date("Y-m-d", $timet));
301 return __date($year, $month, $day);
304 function add_months($date, $months) // accepts negative values as well
308 list($day, $month, $year) = explode_date_to_dmy($date);
310 $months += $year*12+$month;
311 $month = ($months-1)%12+1;
312 $year = ($months-$month)/12;
314 $timet = mktime(0,0,0, $month, min($day, days_in_month($month, $year)), $year);
316 if ($SysPrefs->date_system == 1 || $SysPrefs->date_system == 2)
318 if ($SysPrefs->date_system == 1)
319 list($year, $month, $day) = gregorian_to_jalali(date("Y", $timet), date("n", $timet), date("j", $timet));
320 elseif ($SysPrefs->date_system == 2)
321 list($year, $month, $day) = gregorian_to_islamic(date("Y", $timet), date("n", $timet), date("j", $timet));
322 return __date($year, $month, $day);
324 list($year, $month, $day) = explode("-", date("Y-m-d", $timet));
325 return __date($year, $month, $day);
328 function add_years($date, $years) // accepts negative values as well
332 list($day, $month, $year) = explode_date_to_dmy($date);
333 $timet = Mktime(0,0,0, $month, $day, $year + $years);
334 if ($SysPrefs->date_system == 1 || $SysPrefs->date_system == 2)
336 if ($SysPrefs->date_system == 1)
337 list($year, $month, $day) = gregorian_to_jalali(date("Y", $timet), date("n", $timet), date("j", $timet));
338 elseif ($SysPrefs->date_system == 2)
339 list($year, $month, $day) = gregorian_to_islamic(date("Y", $timet), date("n", $timet), date("j", $timet));
340 return __date($year, $month, $day);
342 list($year, $month, $day) = explode("-", date("Y-m-d", $timet));
343 return __date($year, $month, $day);
346 //_______________________________________________________________
348 function sql2date($date_)
352 //for MySQL dates are in the format YYYY-mm-dd
354 if (strpos($date_, "/"))
355 { // In MySQL it could be either / or -
356 list($year, $month, $day) = explode("/", $date_);
358 elseif (strpos ($date_, "-"))
360 list($year, $month, $day) = explode("-", $date_);
362 if (!isset($day)) // data format error
365 if (strlen($day) > 4)
366 { /*chop off the time stuff */
367 $day = substr($day, 0, 2);
369 if ($SysPrefs->date_system == 1)
370 list($year, $month, $day) = gregorian_to_jalali($year, $month, $day);
371 elseif ($SysPrefs->date_system == 2)
372 list($year, $month, $day) = gregorian_to_islamic($year, $month, $day);
373 return __date($year, $month, $day);
374 } // end function sql2date
377 function date2sql($date_)
379 global $SysPrefs, $tmonths;
380 /* takes a date in a the format specified in $DefaultDateFormat
381 and converts to a yyyy/mm/dd format */
383 $how = user_date_format();
384 $sep = $SysPrefs->dateseps[user_date_sep()];
386 $date_ = trim($date_);
387 if ($date_ == null || strlen($date_) == 0)
390 $year = $month = $day = 0;
391 // Split up the date by the separator based on "how" to split it
392 if ($how == 0 || $how == 3) // MMDDYYYY or MmmDDYYYY
393 list($month, $day, $year) = explode($sep, $date_);
394 elseif ($how == 1 || $how == 4) // DDMMYYYY or DDMmYYYY
395 list($day, $month, $year) = explode($sep, $date_);
396 else // $how == 2 || $how == 5, YYYYMMDD or YYYYMmmDD
397 list($year, $month, $day) = explode($sep, $date_);
401 $month = array_search($month, $tmonths);
403 //to modify assumption in 2030
404 if ($SysPrefs->date_system == 0 || $SysPrefs->date_system == 3)
410 elseif ((int)$year > 59 && (int)$year < 100)
415 if ((int)$year > 9999)
419 if ($SysPrefs->date_system == 1)
420 list($year, $month, $day) = jalali_to_gregorian($year, $month, $day);
421 elseif ($SysPrefs->date_system == 2)
422 list($year, $month, $day) = islamic_to_gregorian($year, $month, $day);
424 return sprintf("%04d-%02d-%02d", $year, $month, $day);
428 * Compare dates in sql format.
429 * Return +1 if sql date1>date2, -1 if date1<date2,
430 * or 0 if dates are equal.
432 function sql_date_comp($date1, $date2)
434 @list($year1, $month1, $day1) = explode("-", $date1);
435 @list($year2, $month2, $day2) = explode("-", $date2);
437 if ($year1 != $year2) {
438 return $year1 < $year2 ? -1 : +1;
440 elseif ($month1 != $month2) {
441 return $month1 < $month2 ? -1 : +1;
443 elseif ($day1 != $day2) {
444 return $day1 < $day2 ? -1 : +1;
449 Compare dates in user format.
451 function date_comp($date1, $date2)
453 $date1 = date2sql($date1);
454 $date2 = date2sql($date2);
456 return sql_date_comp($date1, $date2);
459 function date1_greater_date2 ($date1, $date2)
462 /* returns 1 true if date1 is greater than date_ 2 */
464 $date1 = date2sql($date1);
465 $date2 = date2sql($date2);
467 @list($year1, $month1, $day1) = explode("-", $date1);
468 @list($year2, $month2, $day2) = explode("-", $date2);
474 elseif ($year1 == $year2)
476 if ($month1 > $month2)
480 elseif ($month1 == $month2)
491 function date_diff2 ($date1, $date2, $period)
494 /* expects dates in the format specified in $DefaultDateFormat - period can be one of 'd','w','y','m'
495 months are assumed to be 30 days and years 365.25 days This only works
496 provided that both dates are after 1970. Also only works for dates up to the year 2035 ish */
498 $date1 = date2sql($date1);
499 $date2 = date2sql($date2);
500 list($year1, $month1, $day1) = explode("-", $date1);
501 list($year2, $month2, $day2) = explode("-", $date2);
503 $stamp1 = mktime(0,0,0, (int)$month1, (int)$day1, (int)$year1);
504 $stamp2 = mktime(0,0,0, (int)$month2, (int)$day2, (int)$year2);
505 $difference = $stamp1 - $stamp2;
507 /* difference is the number of seconds between each date negative if date_ 2 > date_ 1 */
512 return (int)($difference / (24 * 60 * 60));
514 return (int)($difference / (24 * 60 * 60 * 7));
516 return (int)($difference / (24 * 60 * 60 * 30));
520 return (int)($difference / (24 * 60 * 60 * 365.25));
526 function explode_date_to_dmy($date_)
528 $date = date2sql($date_);
533 list($year, $month, $day) = explode("-", $date);
534 return array($day, $month, $year);
539 return (int) ($a / $b);
541 /* Based on convertor to and from Gregorian and Jalali calendars.
542 Copyright (C) 2000 Roozbeh Pournader and Mohammad Toossi
543 Released under GNU General Public License */
545 function gregorian_to_jalali ($g_y, $g_m, $g_d)
547 $g_days_in_month = array(31, 28, 31, 30, 31, 30, 31, 31, 30, 31, 30, 31);
548 $j_days_in_month = array(31, 31, 31, 31, 31, 31, 30, 30, 30, 30, 30, 29);
554 $g_day_no = 365 * $gy + div($gy + 3, 4) - div($gy + 99, 100) + div($gy + 399, 400);
556 for ($i = 0; $i < $gm; ++$i)
557 $g_day_no += $g_days_in_month[$i];
558 if ($gm > 1 && (($gy % 4 == 0 && $gy % 100 != 0) || ($gy % 400 == 0)))
559 /* leap and after Feb */
562 $j_day_no = $g_day_no - 79;
564 $j_np = div($j_day_no, 12053); /* 12053 = 365*33 + 32/4 */
567 $jy = 979 + 33 * $j_np + 4 * div($j_day_no, 1461); /* 1461 = 365*4 + 4/4 */
571 if ($j_day_no >= 366)
573 $jy += div($j_day_no - 1, 365);
574 $j_day_no = ($j_day_no - 1) % 365;
577 for ($i = 0; $i < 11 && $j_day_no >= $j_days_in_month[$i]; ++$i)
578 $j_day_no -= $j_days_in_month[$i];
582 return array($jy, $jm, $jd);
585 function jalali_to_gregorian($j_y, $j_m, $j_d)
587 $g_days_in_month = array(31, 28, 31, 30, 31, 30, 31, 31, 30, 31, 30, 31);
588 $j_days_in_month = array(31, 31, 31, 31, 31, 31, 30, 30, 30, 30, 30, 29);
594 $j_day_no = 365 * $jy + div($jy, 33) * 8 + div($jy % 33 + 3, 4);
595 for ($i = 0; $i < $jm; ++$i)
596 $j_day_no += $j_days_in_month[$i];
600 $g_day_no = $j_day_no + 79;
602 $gy = 1600 + 400 * div($g_day_no, 146097); /* 146097 = 365*400 + 400/4 - 400/100 + 400/400 */
606 if ($g_day_no >= 36525) /* 36525 = 365*100 + 100/4 */
609 $gy += 100 * div($g_day_no, 36524); /* 36524 = 365*100 + 100/4 - 100/100 */
612 if ($g_day_no >= 365)
618 $gy += 4 * div($g_day_no, 1461); /* 1461 = 365*4 + 4/4 */
621 if ($g_day_no >= 366)
626 $gy += div($g_day_no, 365);
630 for ($i = 0; $g_day_no >= $g_days_in_month[$i] + ($i == 1 && $leap); $i++)
631 $g_day_no -= $g_days_in_month[$i] + ($i == 1 && $leap);
635 return array($gy, $gm, $gd);
637 /* Based on Hidri Date Script
638 Released under GNU General Public License */
639 function gregorian_to_islamic($g_y, $g_m, $g_d)
644 if (($y > 1582) || (($y == 1582) && ($m > 10)) || (($y == 1582) &&
645 ($m == 10) && ($d > 14)))
647 $jd = (int)((1461 * ($y + 4800 + (int)(($m - 14) / 12)))/ 4) +
648 (int)((367 * ($m - 2 - 12 * ((int)(($m - 14) / 12)))) / 12) -
649 (int)((3 * ((int)(($y + 4900 + (int)(($m - 14) / 12)) / 100))) / 4) + $d - 32075;
653 $jd = 367 * $y - (int)((7 * ($y + 5001 + (int)(($m - 9) / 7))) / 4) +
654 (int)((275 * $m) / 9) + $d + 1729777;
656 $l = $jd - 1948440 + 10632;
657 $n = (int)(($l - 1) / 10631);
658 $l = $l - 10631 * $n + 354;
659 $j = ((int)((10985 - $l) / 5316)) * ((int)((50 * $l) / 17719)) +
660 ((int)($l / 5670)) * ((int)((43 * $l) / 15238));
661 $l = $l - ((int)((30 - $j) / 15)) * ((int)((17719 * $j) / 50)) -
662 ((int)($j / 16)) * ((int)((15238 * $j) / 43)) + 29;
663 $m = (int)((24 * $l) / 709);
664 $d = $l - (int)((709 * $m) / 24);
665 $y = 30 * $n + $j - 30;
666 return array($y, $m, $d);
669 function islamic_to_gregorian($i_y, $i_m, $i_d)
675 $jd = (int)((11 * $y + 3) / 30) + 354 * $y + 30 * $m - (int)(($m - 1) / 2) + $d + 1948440 - 385;
679 $n = (int)((4 * $l) / 146097);
680 $l = $l - (int)((146097 * $n + 3) / 4);
681 $i = (int)((4000 * ($l + 1)) / 1461001);
682 $l = $l - (int)((1461 * $i) / 4) + 31;
683 $j = (int)((80 * $l) / 2447);
684 $d = $l - (int)((2447 * $j) / 80);
686 $m = $j + 2 - 12 * $l;
687 $y = 100 * ($n - 49) + $i + $l;
692 $k = (int)(($j - 1) / 1461);
694 $n = (int)(($l - 1) / 365) - (int)($l / 1461);
695 $i = $l - 365 * $n + 30;
696 $j = (int)((80 * $i) / 2447);
697 $d = $i - (int)((2447 * $j) / 80);
699 $m = $j + 2 - 12 * $i;
700 $y = 4 * $k + $n + $i - 4716;
702 return array($y, $m, $d);