-
Notifications
You must be signed in to change notification settings - Fork 37
/
prayer.php
624 lines (471 loc) · 17.3 KB
/
prayer.php
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
455
456
457
458
459
460
461
462
463
464
465
466
467
468
469
470
471
472
473
474
475
476
477
478
479
480
481
482
483
484
485
486
487
488
489
490
491
492
493
494
495
496
497
498
499
500
501
502
503
504
505
506
507
508
509
510
511
512
513
514
515
516
517
518
519
520
521
522
523
524
525
526
527
528
529
530
531
532
533
534
535
536
537
538
539
540
541
542
543
544
545
546
547
548
549
550
551
552
553
554
555
556
557
558
559
560
561
562
563
564
565
566
567
568
569
570
571
572
573
574
575
576
577
578
579
580
581
582
583
584
585
586
587
588
589
590
591
592
593
594
595
596
597
598
599
600
601
602
603
604
605
606
607
608
609
610
611
612
613
614
615
616
617
618
619
620
621
622
623
624
<?php
//--------------------- Copyright Block ----------------------
/*
PrayTime.php: Prayer Times Calculator (ver 1.2.2)
Copyright (C) 2007-2010 PrayTimes.org
Developer: Hamid Zarrabi-Zadeh
License: GNU General Public License, ver 3
TERMS OF USE:
Permission is granted to use this code, with or
without modification, in any website or application
provided that credit is given to the original work
with a link back to PrayTimes.org.
This program is distributed in the hope that it will
be useful, but WITHOUT ANY WARRANTY.
PLEASE DO NOT REMOVE THIS COPYRIGHT BLOCK.
*/
//--------------------- Help and Manual ----------------------
/*
User's Manual:
http://praytimes.org/manual
Calculating Formulas:
http://praytimes.org/calculation
//------------------------ User Interface -------------------------
getPrayerTimes (timestamp, latitude, longitude, timeZone)
getDatePrayerTimes (year, month, day, latitude, longitude, timeZone)
setCalcMethod (methodID)
setAsrMethod (methodID)
setFajrAngle (angle)
setMaghribAngle (angle)
setIshaAngle (angle)
setDhuhrMinutes (minutes) // minutes after mid-day
setMaghribMinutes (minutes) // minutes after sunset
setIshaMinutes (minutes) // minutes after maghrib
setHighLatsMethod (methodID) // adjust method for higher latitudes
setTimeFormat (timeFormat)
floatToTime24 (time)
floatToTime12 (time)
floatToTime12NS (time)
//------------------------- Sample Usage --------------------------
$prayTime->setCalcMethod($prayTime->ISNA);
$times = $prayTime->getPrayerTimes(time(), 43, -80, -5);
print('Sunrise = '. $times[1]);
*/
//--------------------- PrayTime Class -----------------------
class PrayTime
{
//------------------------ Constants --------------------------
// Calculation Methods
var $Jafari = 0; // Ithna Ashari
var $Karachi = 1; // University of Islamic Sciences, Karachi
var $ISNA = 2; // Islamic Society of North America (ISNA)
var $MWL = 3; // Muslim World League (MWL)
var $Makkah = 4; // Umm al-Qura, Makkah
var $Egypt = 5; // Egyptian General Authority of Survey
var $Custom = 6; // Custom Setting
var $Tehran = 7; // Institute of Geophysics, University of Tehran
// Juristic Methods
var $Shafii = 0; // Shafii (standard)
var $Hanafi = 1; // Hanafi
// Adjusting Methods for Higher Latitudes
var $None = 0; // No adjustment
var $MidNight = 1; // middle of night
var $OneSeventh = 2; // 1/7th of night
var $AngleBased = 3; // angle/60th of night
// Time Formats
var $Time24 = 0; // 24-hour format
var $Time12 = 1; // 12-hour format
var $Time12NS = 2; // 12-hour format with no suffix
var $Float = 3; // floating point number
// Time Names
var $timeNames = array(
'Fajr',
'Sunrise',
'Dhuhr',
'Asr',
'Sunset',
'Maghrib',
'Isha'
);
var $InvalidTime = '-----'; // The string used for invalid times
//---------------------- Global Variables --------------------
var $calcMethod = 0; // caculation method
var $asrJuristic = 0; // Juristic method for Asr
var $dhuhrMinutes = 0; // minutes after mid-day for Dhuhr
var $adjustHighLats = 1; // adjusting method for higher latitudes
var $timeFormat = 0; // time format
var $lat; // latitude
var $lng; // longitude
var $timeZone; // time-zone
var $JDate; // Julian date
//--------------------- Technical Settings --------------------
var $numIterations = 1; // number of iterations needed to compute times
//------------------- Calc Method Parameters --------------------
var $methodParams = array();
/* var $methodParams[methodNum] = array(fa, ms, mv, is, iv);
fa : fajr angle
ms : maghrib selector (0 = angle; 1 = minutes after sunset)
mv : maghrib parameter value (in angle or minutes)
is : isha selector (0 = angle; 1 = minutes after maghrib)
iv : isha parameter value (in angle or minutes)
*/
//----------------------- Constructors -------------------------
function PrayTime($methodID = 0)
{
$this->methodParams[$this->Jafari] = array(16, 0, 4, 0, 14);
$this->methodParams[$this->Karachi] = array(18, 1, 0, 0, 18);
$this->methodParams[$this->ISNA] = array(15, 1, 0, 0, 15);
$this->methodParams[$this->MWL] = array(18, 1, 0, 0, 17);
$this->methodParams[$this->Makkah] = array(18.5, 1, 0, 1, 90);
$this->methodParams[$this->Egypt] = array(19.5, 1, 0, 0, 17.5);
$this->methodParams[$this->Tehran] = array(17.7, 0, 4.5, 0, 14);
$this->methodParams[$this->Custom] = array(18, 1, 0, 0, 17);
$this->setCalcMethod($methodID);
}
function __construct($methodID = 0)
{
$this->PrayTime($methodID);
}
//-------------------- Interface Functions --------------------
// return prayer times for a given date
function getDatePrayerTimes($year, $month, $day, $latitude, $longitude, $timeZone)
{
$this->lat = $latitude;
$this->lng = $longitude;
$this->timeZone = $timeZone;
$this->JDate = $this->julianDate($year, $month, $day)- $longitude/ (15* 24);
return $this->computeDayTimes();
}
// return prayer times for a given timestamp
function getPrayerTimes($timestamp, $latitude, $longitude, $timeZone)
{
$date = @getdate($timestamp);
return $this->getDatePrayerTimes($date['year'], $date['mon'], $date['mday'],
$latitude, $longitude, $timeZone);
}
// set the calculation method
function setCalcMethod($methodID)
{
$this->calcMethod = $methodID;
}
// set the juristic method for Asr
function setAsrMethod($methodID)
{
if ($methodID < 0 || $methodID > 1)
return;
$this->asrJuristic = $methodID;
}
// set the angle for calculating Fajr
function setFajrAngle($angle)
{
$this->setCustomParams(array($angle, null, null, null, null));
}
// set the angle for calculating Maghrib
function setMaghribAngle($angle)
{
$this->setCustomParams(array(null, 0, $angle, null, null));
}
// set the angle for calculating Isha
function setIshaAngle($angle)
{
$this->setCustomParams(array(null, null, null, 0, $angle));
}
// set the minutes after mid-day for calculating Dhuhr
function setDhuhrMinutes($minutes)
{
$this->dhuhrMinutes = $minutes;
}
// set the minutes after Sunset for calculating Maghrib
function setMaghribMinutes($minutes)
{
$this->setCustomParams(array(null, 1, $minutes, null, null));
}
// set the minutes after Maghrib for calculating Isha
function setIshaMinutes($minutes)
{
$this->setCustomParams(array(null, null, null, 1, $minutes));
}
// set custom values for calculation parameters
function setCustomParams($params)
{
for ($i=0; $i<5; $i++)
{
if ($params[$i] == null)
$this->methodParams[$this->Custom][$i] = $this->methodParams[$this->calcMethod][$i];
else
$this->methodParams[$this->Custom][$i] = $params[$i];
}
$this->calcMethod = $this->Custom;
}
// set adjusting method for higher latitudes
function setHighLatsMethod($methodID)
{
$this->adjustHighLats = $methodID;
}
// set the time format
function setTimeFormat($timeFormat)
{
$this->timeFormat = $timeFormat;
}
// convert float hours to 24h format
function floatToTime24($time)
{
if (is_nan($time))
return $this->InvalidTime;
$time = $this->fixhour($time+ 0.5/ 60); // add 0.5 minutes to round
$hours = floor($time);
$minutes = floor(($time- $hours)* 60);
return $this->twoDigitsFormat($hours). ':'. $this->twoDigitsFormat($minutes);
}
// convert float hours to 12h format
function floatToTime12($time, $noSuffix = false)
{
if (is_nan($time))
return $this->InvalidTime;
$time = $this->fixhour($time+ 0.5/ 60); // add 0.5 minutes to round
$hours = floor($time);
$minutes = floor(($time- $hours)* 60);
$suffix = $hours >= 12 ? ' pm' : ' am';
$hours = ($hours+ 12- 1)% 12+ 1;
return $hours. ':'. $this->twoDigitsFormat($minutes). ($noSuffix ? '' : $suffix);
}
// convert float hours to 12h format with no suffix
function floatToTime12NS($time)
{
return $this->floatToTime12($time, true);
}
//---------------------- Calculation Functions -----------------------
// References:
// http://www.ummah.net/astronomy/saltime
// http://aa.usno.navy.mil/faq/docs/SunApprox.html
// compute declination angle of sun and equation of time
function sunPosition($jd)
{
$D = $jd - 2451545.0;
$g = $this->fixangle(357.529 + 0.98560028* $D);
$q = $this->fixangle(280.459 + 0.98564736* $D);
$L = $this->fixangle($q + 1.915* $this->dsin($g) + 0.020* $this->dsin(2*$g));
$R = 1.00014 - 0.01671* $this->dcos($g) - 0.00014* $this->dcos(2*$g);
$e = 23.439 - 0.00000036* $D;
$d = $this->darcsin($this->dsin($e)* $this->dsin($L));
$RA = $this->darctan2($this->dcos($e)* $this->dsin($L), $this->dcos($L))/ 15;
$RA = $this->fixhour($RA);
$EqT = $q/15 - $RA;
return array($d, $EqT);
}
// compute equation of time
function equationOfTime($jd)
{
$sp = $this->sunPosition($jd);
return $sp[1];
}
// compute declination angle of sun
function sunDeclination($jd)
{
$sp = $this->sunPosition($jd);
return $sp[0];
}
// compute mid-day (Dhuhr, Zawal) time
function computeMidDay($t)
{
$T = $this->equationOfTime($this->JDate+ $t);
$Z = $this->fixhour(12- $T);
return $Z;
}
// compute time for a given angle G
function computeTime($G, $t)
{
$D = $this->sunDeclination($this->JDate+ $t);
$Z = $this->computeMidDay($t);
$V = 1/15* $this->darccos((-$this->dsin($G)- $this->dsin($D)* $this->dsin($this->lat))/
($this->dcos($D)* $this->dcos($this->lat)));
return $Z+ ($G>90 ? -$V : $V);
}
// compute the time of Asr
function computeAsr($step, $t) // Shafii: step=1, Hanafi: step=2
{
$D = $this->sunDeclination($this->JDate+ $t);
$G = -$this->darccot($step+ $this->dtan(abs($this->lat- $D)));
return $this->computeTime($G, $t);
}
//---------------------- Compute Prayer Times -----------------------
// compute prayer times at given julian date
function computeTimes($times)
{
$t = $this->dayPortion($times);
$Fajr = $this->computeTime(180- $this->methodParams[$this->calcMethod][0], $t[0]);
$Sunrise = $this->computeTime(180- 0.833, $t[1]);
$Dhuhr = $this->computeMidDay($t[2]);
$Asr = $this->computeAsr(1+ $this->asrJuristic, $t[3]);
$Sunset = $this->computeTime(0.833, $t[4]);;
$Maghrib = $this->computeTime($this->methodParams[$this->calcMethod][2], $t[5]);
$Isha = $this->computeTime($this->methodParams[$this->calcMethod][4], $t[6]);
return array($Fajr, $Sunrise, $Dhuhr, $Asr, $Sunset, $Maghrib, $Isha);
}
// compute prayer times at given julian date
function computeDayTimes()
{
$times = array(5, 6, 12, 13, 18, 18, 18); //default times
for ($i=1; $i<=$this->numIterations; $i++)
$times = $this->computeTimes($times);
$times = $this->adjustTimes($times);
return $this->adjustTimesFormat($times);
}
// adjust times in a prayer time array
function adjustTimes($times)
{
for ($i=0; $i<7; $i++)
$times[$i] += $this->timeZone- $this->lng/ 15;
$times[2] += $this->dhuhrMinutes/ 60; //Dhuhr
if ($this->methodParams[$this->calcMethod][1] == 1) // Maghrib
$times[5] = $times[4]+ $this->methodParams[$this->calcMethod][2]/ 60;
if ($this->methodParams[$this->calcMethod][3] == 1) // Isha
$times[6] = $times[5]+ $this->methodParams[$this->calcMethod][4]/ 60;
if ($this->adjustHighLats != $this->None)
$times = $this->adjustHighLatTimes($times);
return $times;
}
// convert times array to given time format
function adjustTimesFormat($times)
{
if ($this->timeFormat == $this->Float)
return $times;
for ($i=0; $i<7; $i++)
if ($this->timeFormat == $this->Time12)
$times[$i] = $this->floatToTime12($times[$i]);
else if ($this->timeFormat == $this->Time12NS)
$times[$i] = $this->floatToTime12($times[$i], true);
else
$times[$i] = $this->floatToTime24($times[$i]);
return $times;
}
// adjust Fajr, Isha and Maghrib for locations in higher latitudes
function adjustHighLatTimes($times)
{
$nightTime = $this->timeDiff($times[4], $times[1]); // sunset to sunrise
// Adjust Fajr
$FajrDiff = $this->nightPortion($this->methodParams[$this->calcMethod][0])* $nightTime;
if (is_nan($times[0]) || $this->timeDiff($times[0], $times[1]) > $FajrDiff)
$times[0] = $times[1]- $FajrDiff;
// Adjust Isha
$IshaAngle = ($this->methodParams[$this->calcMethod][3] == 0) ? $this->methodParams[$this->calcMethod][4] : 18;
$IshaDiff = $this->nightPortion($IshaAngle)* $nightTime;
if (is_nan($times[6]) || $this->timeDiff($times[4], $times[6]) > $IshaDiff)
$times[6] = $times[4]+ $IshaDiff;
// Adjust Maghrib
$MaghribAngle = ($this->methodParams[$this->calcMethod][1] == 0) ? $this->methodParams[$this->calcMethod][2] : 4;
$MaghribDiff = $this->nightPortion($MaghribAngle)* $nightTime;
if (is_nan($times[5]) || $this->timeDiff($times[4], $times[5]) > $MaghribDiff)
$times[5] = $times[4]+ $MaghribDiff;
return $times;
}
// the night portion used for adjusting times in higher latitudes
function nightPortion($angle)
{
if ($this->adjustHighLats == $this->AngleBased)
return 1/60* $angle;
if ($this->adjustHighLats == $this->MidNight)
return 1/2;
if ($this->adjustHighLats == $this->OneSeventh)
return 1/7;
}
// convert hours to day portions
function dayPortion($times)
{
for ($i=0; $i<7; $i++)
$times[$i] /= 24;
return $times;
}
//---------------------- Misc Functions -----------------------
// compute the difference between two times
function timeDiff($time1, $time2)
{
return $this->fixhour($time2- $time1);
}
// add a leading 0 if necessary
function twoDigitsFormat($num)
{
return ($num <10) ? '0'. $num : $num;
}
//---------------------- Julian Date Functions -----------------------
// calculate julian date from a calendar date
function julianDate($year, $month, $day)
{
if ($month <= 2)
{
$year -= 1;
$month += 12;
}
$A = floor($year/ 100);
$B = 2- $A+ floor($A/ 4);
$JD = floor(365.25* ($year+ 4716))+ floor(30.6001* ($month+ 1))+ $day+ $B- 1524.5;
return $JD;
}
// convert a calendar date to julian date (second method)
function calcJD($year, $month, $day)
{
$J1970 = 2440588.0;
$date = $year. '-'. $month. '-'. $day;
$ms = strtotime($date); // # of milliseconds since midnight Jan 1, 1970
$days = floor($ms/ (1000 * 60 * 60* 24));
return $J1970+ $days- 0.5;
}
//---------------------- Trigonometric Functions -----------------------
// degree sin
function dsin($d)
{
return sin($this->dtr($d));
}
// degree cos
function dcos($d)
{
return cos($this->dtr($d));
}
// degree tan
function dtan($d)
{
return tan($this->dtr($d));
}
// degree arcsin
function darcsin($x)
{
return $this->rtd(asin($x));
}
// degree arccos
function darccos($x)
{
return $this->rtd(acos($x));
}
// degree arctan
function darctan($x)
{
return $this->rtd(atan($x));
}
// degree arctan2
function darctan2($y, $x)
{
return $this->rtd(atan2($y, $x));
}
// degree arccot
function darccot($x)
{
return $this->rtd(atan(1/$x));
}
// degree to radian
function dtr($d)
{
return ($d * M_PI) / 180.0;
}
// radian to degree
function rtd($r)
{
return ($r * 180.0) / M_PI;
}
// range reduce angle in degrees.
function fixangle($a)
{
$a = $a - 360.0 * floor($a / 360.0);
$a = $a < 0 ? $a + 360.0 : $a;
return $a;
}
// range reduce hours to 0..23
function fixhour($a)
{
$a = $a - 24.0 * floor($a / 24.0);
$a = $a < 0 ? $a + 24.0 : $a;
return $a;
}
}
//---------------------- prayTime Object -----------------------
$prayTime = new PrayTime();
?>