amp /include/adodb/adodb-time.inc.php

Language PHP Lines 1338
MD5 Hash c15edf9c83b23c420e476f4ccd3f8a04 Estimated Cost $18,160 (why?)
Repository https://github.com/radicaldesigns/amp.git View Raw File View Project SPDX
   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
 625
 626
 627
 628
 629
 630
 631
 632
 633
 634
 635
 636
 637
 638
 639
 640
 641
 642
 643
 644
 645
 646
 647
 648
 649
 650
 651
 652
 653
 654
 655
 656
 657
 658
 659
 660
 661
 662
 663
 664
 665
 666
 667
 668
 669
 670
 671
 672
 673
 674
 675
 676
 677
 678
 679
 680
 681
 682
 683
 684
 685
 686
 687
 688
 689
 690
 691
 692
 693
 694
 695
 696
 697
 698
 699
 700
 701
 702
 703
 704
 705
 706
 707
 708
 709
 710
 711
 712
 713
 714
 715
 716
 717
 718
 719
 720
 721
 722
 723
 724
 725
 726
 727
 728
 729
 730
 731
 732
 733
 734
 735
 736
 737
 738
 739
 740
 741
 742
 743
 744
 745
 746
 747
 748
 749
 750
 751
 752
 753
 754
 755
 756
 757
 758
 759
 760
 761
 762
 763
 764
 765
 766
 767
 768
 769
 770
 771
 772
 773
 774
 775
 776
 777
 778
 779
 780
 781
 782
 783
 784
 785
 786
 787
 788
 789
 790
 791
 792
 793
 794
 795
 796
 797
 798
 799
 800
 801
 802
 803
 804
 805
 806
 807
 808
 809
 810
 811
 812
 813
 814
 815
 816
 817
 818
 819
 820
 821
 822
 823
 824
 825
 826
 827
 828
 829
 830
 831
 832
 833
 834
 835
 836
 837
 838
 839
 840
 841
 842
 843
 844
 845
 846
 847
 848
 849
 850
 851
 852
 853
 854
 855
 856
 857
 858
 859
 860
 861
 862
 863
 864
 865
 866
 867
 868
 869
 870
 871
 872
 873
 874
 875
 876
 877
 878
 879
 880
 881
 882
 883
 884
 885
 886
 887
 888
 889
 890
 891
 892
 893
 894
 895
 896
 897
 898
 899
 900
 901
 902
 903
 904
 905
 906
 907
 908
 909
 910
 911
 912
 913
 914
 915
 916
 917
 918
 919
 920
 921
 922
 923
 924
 925
 926
 927
 928
 929
 930
 931
 932
 933
 934
 935
 936
 937
 938
 939
 940
 941
 942
 943
 944
 945
 946
 947
 948
 949
 950
 951
 952
 953
 954
 955
 956
 957
 958
 959
 960
 961
 962
 963
 964
 965
 966
 967
 968
 969
 970
 971
 972
 973
 974
 975
 976
 977
 978
 979
 980
 981
 982
 983
 984
 985
 986
 987
 988
 989
 990
 991
 992
 993
 994
 995
 996
 997
 998
 999
1000
1001
1002
1003
1004
1005
1006
1007
1008
1009
1010
1011
1012
1013
1014
1015
1016
1017
1018
1019
1020
1021
1022
1023
1024
1025
1026
1027
1028
1029
1030
1031
1032
1033
1034
1035
1036
1037
1038
1039
1040
1041
1042
1043
1044
1045
1046
1047
1048
1049
1050
1051
1052
1053
1054
1055
1056
1057
1058
1059
1060
1061
1062
1063
1064
1065
1066
1067
1068
1069
1070
1071
1072
1073
1074
1075
1076
1077
1078
1079
1080
1081
1082
1083
1084
1085
1086
1087
1088
1089
1090
1091
1092
1093
1094
1095
1096
1097
1098
1099
1100
1101
1102
1103
1104
1105
1106
1107
1108
1109
1110
1111
1112
1113
1114
1115
1116
1117
1118
1119
1120
1121
1122
1123
1124
1125
1126
1127
1128
1129
1130
1131
1132
1133
1134
1135
1136
1137
1138
1139
1140
1141
1142
1143
1144
1145
1146
1147
1148
1149
1150
1151
1152
1153
1154
1155
1156
1157
1158
1159
1160
1161
1162
1163
1164
1165
1166
1167
1168
1169
1170
1171
1172
1173
1174
1175
1176
1177
1178
1179
1180
1181
1182
1183
1184
1185
1186
1187
1188
1189
1190
1191
1192
1193
1194
1195
1196
1197
1198
1199
1200
1201
1202
1203
1204
1205
1206
1207
1208
1209
1210
1211
1212
1213
1214
1215
1216
1217
1218
1219
1220
1221
1222
1223
1224
1225
1226
1227
1228
1229
1230
1231
1232
1233
1234
1235
1236
1237
1238
1239
1240
1241
1242
1243
1244
1245
1246
1247
1248
1249
1250
1251
1252
1253
1254
1255
1256
1257
1258
1259
1260
1261
1262
1263
1264
1265
1266
1267
1268
1269
1270
1271
1272
1273
1274
1275
1276
1277
1278
1279
1280
1281
1282
1283
1284
1285
1286
1287
1288
1289
1290
1291
1292
1293
1294
1295
1296
1297
1298
1299
1300
1301
1302
1303
1304
1305
1306
1307
1308
1309
1310
1311
1312
1313
1314
1315
1316
1317
1318
1319
1320
1321
1322
1323
1324
1325
1326
1327
1328
1329
1330
1331
1332
1333
1334
1335
1336
1337
<?php
/**
ADOdb Date Library, part of the ADOdb abstraction library
Download: http://phplens.com/phpeverywhere/

PHP native date functions use integer timestamps for computations.
Because of this, dates are restricted to the years 1901-2038 on Unix 
and 1970-2038 on Windows due to integer overflow for dates beyond 
those years. This library overcomes these limitations by replacing the 
native function's signed integers (normally 32-bits) with PHP floating 
point numbers (normally 64-bits).

Dates from 100 A.D. to 3000 A.D. and later
have been tested. The minimum is 100 A.D. as <100 will invoke the
2 => 4 digit year conversion. The maximum is billions of years in the 
future, but this is a theoretical limit as the computation of that year 
would take too long with the current implementation of adodb_mktime().

This library replaces native functions as follows:

<pre>	
	getdate()  with  adodb_getdate()
	date()   with  adodb_date() 
	gmdate()   with  adodb_gmdate()
	mktime()   with  adodb_mktime()
	gmmktime() with  adodb_gmmktime()
	strftime() with  adodb_strftime()
	strftime() with  adodb_gmstrftime()
</pre>
	
The parameters are identical, except that adodb_date() accepts a subset
of date()'s field formats. Mktime() will convert from local time to GMT, 
and date() will convert from GMT to local time, but daylight savings is 
not handled currently.

This library is independant of the rest of ADOdb, and can be used
as standalone code.

PERFORMANCE

For high speed, this library uses the native date functions where
possible, and only switches to PHP code when the dates fall outside 
the 32-bit signed integer range.

GREGORIAN CORRECTION

Pope Gregory shortened October of A.D. 1582 by ten days. Thursday, 
October 4, 1582 (Julian) was followed immediately by Friday, October 15, 
1582 (Gregorian). 

Since 0.06, we handle this correctly, so:

adodb_mktime(0,0,0,10,15,1582) - adodb_mktime(0,0,0,10,4,1582) 
	== 24 * 3600 (1 day)

=============================================================================

COPYRIGHT

(c) 2003-2005 John Lim and released under BSD-style license except for code by 
jackbbs, which includes adodb_mktime, adodb_get_gmt_diff, adodb_is_leap_year
and originally found at http://www.php.net/manual/en/function.mktime.php

=============================================================================

BUG REPORTS

These should be posted to the ADOdb forums at

	http://phplens.com/lens/lensforum/topics.php?id=4

=============================================================================

FUNCTION DESCRIPTIONS


** FUNCTION adodb_getdate($date=false)

Returns an array containing date information, as getdate(), but supports
dates greater than 1901 to 2038. The local date/time format is derived from a 
heuristic the first time adodb_getdate is called. 
	 
	 
** FUNCTION adodb_date($fmt, $timestamp = false)

Convert a timestamp to a formatted local date. If $timestamp is not defined, the
current timestamp is used. Unlike the function date(), it supports dates
outside the 1901 to 2038 range.

The format fields that adodb_date supports:

<pre>
	a - "am" or "pm" 
	A - "AM" or "PM" 
	d - day of the month, 2 digits with leading zeros; i.e. "01" to "31" 
	D - day of the week, textual, 3 letters; e.g. "Fri" 
	F - month, textual, long; e.g. "January" 
	g - hour, 12-hour format without leading zeros; i.e. "1" to "12" 
	G - hour, 24-hour format without leading zeros; i.e. "0" to "23" 
	h - hour, 12-hour format; i.e. "01" to "12" 
	H - hour, 24-hour format; i.e. "00" to "23" 
	i - minutes; i.e. "00" to "59" 
	j - day of the month without leading zeros; i.e. "1" to "31" 
	l (lowercase 'L') - day of the week, textual, long; e.g. "Friday"  
	L - boolean for whether it is a leap year; i.e. "0" or "1" 
	m - month; i.e. "01" to "12" 
	M - month, textual, 3 letters; e.g. "Jan" 
	n - month without leading zeros; i.e. "1" to "12" 
	O - Difference to Greenwich time in hours; e.g. "+0200" 
	Q - Quarter, as in 1, 2, 3, 4 
	r - RFC 2822 formatted date; e.g. "Thu, 21 Dec 2000 16:01:07 +0200" 
	s - seconds; i.e. "00" to "59" 
	S - English ordinal suffix for the day of the month, 2 characters; 
	   			i.e. "st", "nd", "rd" or "th" 
	t - number of days in the given month; i.e. "28" to "31"
	T - Timezone setting of this machine; e.g. "EST" or "MDT" 
	U - seconds since the Unix Epoch (January 1 1970 00:00:00 GMT)  
	w - day of the week, numeric, i.e. "0" (Sunday) to "6" (Saturday) 
	Y - year, 4 digits; e.g. "1999" 
	y - year, 2 digits; e.g. "99" 
	z - day of the year; i.e. "0" to "365" 
	Z - timezone offset in seconds (i.e. "-43200" to "43200"). 
	   			The offset for timezones west of UTC is always negative, 
				and for those east of UTC is always positive. 
</pre>

Unsupported:
<pre>
	B - Swatch Internet time 
	I (capital i) - "1" if Daylight Savings Time, "0" otherwise.
	W - ISO-8601 week number of year, weeks starting on Monday 

</pre>


** FUNCTION adodb_date2($fmt, $isoDateString = false)
Same as adodb_date, but 2nd parameter accepts iso date, eg.

  adodb_date2('d-M-Y H:i','2003-12-25 13:01:34');

  
** FUNCTION adodb_gmdate($fmt, $timestamp = false)

Convert a timestamp to a formatted GMT date. If $timestamp is not defined, the
current timestamp is used. Unlike the function date(), it supports dates
outside the 1901 to 2038 range.


** FUNCTION adodb_mktime($hr, $min, $sec[, $month, $day, $year])

Converts a local date to a unix timestamp.  Unlike the function mktime(), it supports
dates outside the 1901 to 2038 range. All parameters are optional.


** FUNCTION adodb_gmmktime($hr, $min, $sec [, $month, $day, $year])

Converts a gmt date to a unix timestamp.  Unlike the function gmmktime(), it supports
dates outside the 1901 to 2038 range. Differs from gmmktime() in that all parameters
are currently compulsory.

** FUNCTION adodb_gmstrftime($fmt, $timestamp = false)
Convert a timestamp to a formatted GMT date.

** FUNCTION adodb_strftime($fmt, $timestamp = false)

Convert a timestamp to a formatted local date. Internally converts $fmt into 
adodb_date format, then echo result.

For best results, you can define the local date format yourself. Define a global
variable $ADODB_DATE_LOCALE which is an array, 1st element is date format using
adodb_date syntax, and 2nd element is the time format, also in adodb_date syntax.

  eg. $ADODB_DATE_LOCALE = array('d/m/Y','H:i:s');
	
	Supported format codes:

<pre>
	%a - abbreviated weekday name according to the current locale 
	%A - full weekday name according to the current locale 
	%b - abbreviated month name according to the current locale 
	%B - full month name according to the current locale 
	%c - preferred date and time representation for the current locale 
	%d - day of the month as a decimal number (range 01 to 31) 
	%D - same as %m/%d/%y 
	%e - day of the month as a decimal number, a single digit is preceded by a space (range ' 1' to '31') 
	%h - same as %b
	%H - hour as a decimal number using a 24-hour clock (range 00 to 23) 
	%I - hour as a decimal number using a 12-hour clock (range 01 to 12) 
	%m - month as a decimal number (range 01 to 12) 
	%M - minute as a decimal number 
	%n - newline character 
	%p - either `am' or `pm' according to the given time value, or the corresponding strings for the current locale 
	%r - time in a.m. and p.m. notation 
	%R - time in 24 hour notation 
	%S - second as a decimal number 
	%t - tab character 
	%T - current time, equal to %H:%M:%S 
	%x - preferred date representation for the current locale without the time 
	%X - preferred time representation for the current locale without the date 
	%y - year as a decimal number without a century (range 00 to 99) 
	%Y - year as a decimal number including the century 
	%Z - time zone or name or abbreviation 
	%% - a literal `%' character 
</pre>	

	Unsupported codes:
<pre>
	%C - century number (the year divided by 100 and truncated to an integer, range 00 to 99) 
	%g - like %G, but without the century. 
	%G - The 4-digit year corresponding to the ISO week number (see %V). 
	   This has the same format and value as %Y, except that if the ISO week number belongs 
		 to the previous or next year, that year is used instead. 
	%j - day of the year as a decimal number (range 001 to 366) 
	%u - weekday as a decimal number [1,7], with 1 representing Monday 
	%U - week number of the current year as a decimal number, starting 
	  with the first Sunday as the first day of the first week 
	%V - The ISO 8601:1988 week number of the current year as a decimal number, 
	   range 01 to 53, where week 1 is the first week that has at least 4 days in the 
		 current year, and with Monday as the first day of the week. (Use %G or %g for 
		 the year component that corresponds to the week number for the specified timestamp.) 
	%w - day of the week as a decimal, Sunday being 0 
	%W - week number of the current year as a decimal number, starting with the 
	   first Monday as the first day of the first week 
</pre>

=============================================================================

NOTES

Useful url for generating test timestamps:
	http://www.4webhelp.net/us/timestamp.php

Possible future optimizations include 

a. Using an algorithm similar to Plauger's in "The Standard C Library" 
(page 428, xttotm.c _Ttotm() function). Plauger's algorithm will not 
work outside 32-bit signed range, so i decided not to implement it.

b. Implement daylight savings, which looks awfully complicated, see
	http://webexhibits.org/daylightsaving/


CHANGELOG
- 19 March 2006 0.24
Changed strftime() locale detection, because some locales prepend the day of week to the date when %c is used.

- 10 Feb 2006 0.23
PHP5 compat: when we detect PHP5, the RFC2822 format for gmt 0000hrs is changed from -0000 to +0000. 
	In PHP4, we will still use -0000 for 100% compat with PHP4.

- 08 Sept 2005 0.22
In adodb_date2(), $is_gmt not supported properly. Fixed.

- 18 July  2005 0.21
In PHP 4.3.11, the 'r' format has changed. Leading 0 in day is added. Changed for compat.
Added support for negative months in adodb_mktime().

- 24 Feb 2005 0.20
Added limited strftime/gmstrftime support. x10 improvement in performance of adodb_date().

- 21 Dec 2004 0.17
In adodb_getdate(), the timestamp was accidentally converted to gmt when $is_gmt is false. 
Also adodb_mktime(0,0,0) did not work properly. Both fixed thx Mauro.

- 17 Nov 2004 0.16
Removed intval typecast in adodb_mktime() for secs, allowing:
	 adodb_mktime(0,0,0 + 2236672153,1,1,1934);
Suggested by Ryan.

- 18 July 2004 0.15
All params in adodb_mktime were formerly compulsory. Now only the hour, min, secs is compulsory. 
This brings it more in line with mktime (still not identical).

- 23 June 2004 0.14

Allow you to define your own daylights savings function, adodb_daylight_sv.
If the function is defined (somewhere in an include), then you can correct for daylights savings.

In this example, we apply daylights savings in June or July, adding one hour. This is extremely
unrealistic as it does not take into account time-zone, geographic location, current year.

function adodb_daylight_sv(&$arr, $is_gmt)
{
	if ($is_gmt) return;
	$m = $arr['mon'];
	if ($m == 6 || $m == 7) $arr['hours'] += 1;
}

This is only called by adodb_date() and not by adodb_mktime(). 

The format of $arr is
Array ( 
   [seconds] => 0 
   [minutes] => 0 
   [hours] => 0 
   [mday] => 1    # day of month, eg 1st day of the month
   [mon] => 2     # month (eg. Feb)
   [year] => 2102 
   [yday] => 31   # days in current year
   [leap] =>    # true if leap year
   [ndays] => 28  # no of days in current month
   ) 
   

- 28 Apr 2004 0.13
Fixed adodb_date to properly support $is_gmt. Thx to Dimitar Angelov.

- 20 Mar 2004 0.12
Fixed month calculation error in adodb_date. 2102-June-01 appeared as 2102-May-32.

- 26 Oct 2003 0.11
Because of daylight savings problems (some systems apply daylight savings to 
January!!!), changed adodb_get_gmt_diff() to ignore daylight savings.

- 9 Aug 2003 0.10
Fixed bug with dates after 2038. 
See http://phplens.com/lens/lensforum/msgs.php?id=6980

- 1 July 2003 0.09
Added support for Q (Quarter).
Added adodb_date2(), which accepts ISO date in 2nd param

- 3 March 2003 0.08
Added support for 'S' adodb_date() format char. Added constant ADODB_ALLOW_NEGATIVE_TS
if you want PHP to handle negative timestamps between 1901 to 1969.

- 27 Feb 2003 0.07
All negative numbers handled by adodb now because of RH 7.3+ problems.
See http://bugs.php.net/bug.php?id=20048&edit=2

- 4 Feb 2003 0.06
Fixed a typo, 1852 changed to 1582! This means that pre-1852 dates
are now correctly handled.

- 29 Jan 2003 0.05

Leap year checking differs under Julian calendar (pre 1582). Also
leap year code optimized by checking for most common case first.

We also handle month overflow correctly in mktime (eg month set to 13).

Day overflow for less than one month's days is supported.

- 28 Jan 2003 0.04

Gregorian correction handled. In PHP5, we might throw an error if 
mktime uses invalid dates around 5-14 Oct 1582. Released with ADOdb 3.10.
Added limbo 5-14 Oct 1582 check, when we set to 15 Oct 1582.

- 27 Jan 2003 0.03

Fixed some more month problems due to gmt issues. Added constant ADODB_DATE_VERSION.
Fixed calculation of days since start of year for <1970. 

- 27 Jan 2003 0.02

Changed _adodb_getdate() to inline leap year checking for better performance.
Fixed problem with time-zones west of GMT +0000.

- 24 Jan 2003 0.01

First implementation.
*/


/* Initialization */

/*
	Version Number
*/
define('ADODB_DATE_VERSION',0.24);

/*
	This code was originally for windows. But apparently this problem happens 
	also with Linux, RH 7.3 and later!
	
	glibc-2.2.5-34 and greater has been changed to return -1 for dates <
	1970.  This used to work.  The problem exists with RedHat 7.3 and 8.0
	echo (mktime(0, 0, 0, 1, 1, 1960));  // prints -1
	
	References:
	 http://bugs.php.net/bug.php?id=20048&edit=2
	 http://lists.debian.org/debian-glibc/2002/debian-glibc-200205/msg00010.html
*/

if (!defined('ADODB_ALLOW_NEGATIVE_TS')) define('ADODB_NO_NEGATIVE_TS',1);

function adodb_date_test_date($y1,$m,$d=13)
{
	$t = adodb_mktime(0,0,0,$m,$d,$y1);
	$rez = adodb_date('Y-n-j H:i:s',$t);
	if ("$y1-$m-$d 00:00:00" != $rez) {
		print "<b>$y1 error, expected=$y1-$m-$d 00:00:00, adodb=$rez</b><br>";
		return false;
	}
	return true;
}

function adodb_date_test_strftime($fmt)
{
	$s1 = strftime($fmt);
	$s2 = adodb_strftime($fmt);
	
	if ($s1 == $s2) return true;
	
	echo "error for $fmt,  strftime=$s1, $adodb=$s2<br>";
	return false;
}

/**
	 Test Suite
*/
function adodb_date_test()
{
	
	error_reporting(E_ALL);
	print "<h4>Testing adodb_date and adodb_mktime. version=".ADODB_DATE_VERSION.' PHP='.PHP_VERSION."</h4>";
	@set_time_limit(0);
	$fail = false;
	
	// This flag disables calling of PHP native functions, so we can properly test the code
	if (!defined('ADODB_TEST_DATES')) define('ADODB_TEST_DATES',1);
	
	adodb_date_test_strftime('%Y %m %x %X');
	adodb_date_test_strftime("%A %d %B %Y");
	adodb_date_test_strftime("%H %M S");
	
	$t = adodb_mktime(0,0,0);
	if (!(adodb_date('Y-m-d') == date('Y-m-d'))) print 'Error in '.adodb_mktime(0,0,0).'<br>';
	
	$t = adodb_mktime(0,0,0,6,1,2102);
	if (!(adodb_date('Y-m-d',$t) == '2102-06-01')) print 'Error in '.adodb_date('Y-m-d',$t).'<br>';
	
	$t = adodb_mktime(0,0,0,2,1,2102);
	if (!(adodb_date('Y-m-d',$t) == '2102-02-01')) print 'Error in '.adodb_date('Y-m-d',$t).'<br>';
	
	
	print "<p>Testing gregorian <=> julian conversion<p>";
	$t = adodb_mktime(0,0,0,10,11,1492);
	//http://www.holidayorigins.com/html/columbus_day.html - Friday check
	if (!(adodb_date('D Y-m-d',$t) == 'Fri 1492-10-11')) print 'Error in Columbus landing<br>';
	
	$t = adodb_mktime(0,0,0,2,29,1500);
	if (!(adodb_date('Y-m-d',$t) == '1500-02-29')) print 'Error in julian leap years<br>';
	
	$t = adodb_mktime(0,0,0,2,29,1700);
	if (!(adodb_date('Y-m-d',$t) == '1700-03-01')) print 'Error in gregorian leap years<br>';
	
	print  adodb_mktime(0,0,0,10,4,1582).' ';
	print adodb_mktime(0,0,0,10,15,1582);
	$diff = (adodb_mktime(0,0,0,10,15,1582) - adodb_mktime(0,0,0,10,4,1582));
	if ($diff != 3600*24) print " <b>Error in gregorian correction = ".($diff/3600/24)." days </b><br>";
		
	print " 15 Oct 1582, Fri=".(adodb_dow(1582,10,15) == 5 ? 'Fri' : '<b>Error</b>')."<br>";
	print " 4 Oct 1582, Thu=".(adodb_dow(1582,10,4) == 4 ? 'Thu' : '<b>Error</b>')."<br>";
	
	print "<p>Testing overflow<p>";
	
	$t = adodb_mktime(0,0,0,3,33,1965);
	if (!(adodb_date('Y-m-d',$t) == '1965-04-02')) print 'Error in day overflow 1 <br>';
	$t = adodb_mktime(0,0,0,4,33,1971);
	if (!(adodb_date('Y-m-d',$t) == '1971-05-03')) print 'Error in day overflow 2 <br>';
	$t = adodb_mktime(0,0,0,1,60,1965);
	if (!(adodb_date('Y-m-d',$t) == '1965-03-01')) print 'Error in day overflow 3 '.adodb_date('Y-m-d',$t).' <br>';
	$t = adodb_mktime(0,0,0,12,32,1965);
	if (!(adodb_date('Y-m-d',$t) == '1966-01-01')) print 'Error in day overflow 4 '.adodb_date('Y-m-d',$t).' <br>';
	$t = adodb_mktime(0,0,0,12,63,1965);
	if (!(adodb_date('Y-m-d',$t) == '1966-02-01')) print 'Error in day overflow 5 '.adodb_date('Y-m-d',$t).' <br>';
	$t = adodb_mktime(0,0,0,13,3,1965);
	if (!(adodb_date('Y-m-d',$t) == '1966-01-03')) print 'Error in mth overflow 1 <br>';
	
	print "Testing 2-digit => 4-digit year conversion<p>";
	if (adodb_year_digit_check(00) != 2000) print "Err 2-digit 2000<br>";
	if (adodb_year_digit_check(10) != 2010) print "Err 2-digit 2010<br>";
	if (adodb_year_digit_check(20) != 2020) print "Err 2-digit 2020<br>";
	if (adodb_year_digit_check(30) != 2030) print "Err 2-digit 2030<br>";
	if (adodb_year_digit_check(40) != 1940) print "Err 2-digit 1940<br>";
	if (adodb_year_digit_check(50) != 1950) print "Err 2-digit 1950<br>";
	if (adodb_year_digit_check(90) != 1990) print "Err 2-digit 1990<br>";
	
	// Test string formating
	print "<p>Testing date formating</p>";
	$fmt = '\d\a\t\e T Y-m-d H:i:s a A d D F g G h H i j l L m M n O \R\F\C2822 r s t U w y Y z Z 2003';
	$s1 = date($fmt,0);
	$s2 = adodb_date($fmt,0);
	if ($s1 != $s2) {
		print " date() 0 failed<br>$s1<br>$s2<br>";
	}
	flush();
	for ($i=100; --$i > 0; ) {

		$ts = 3600.0*((rand()%60000)+(rand()%60000))+(rand()%60000);
		$s1 = date($fmt,$ts);
		$s2 = adodb_date($fmt,$ts);
		//print "$s1 <br>$s2 <p>";
		$pos = strcmp($s1,$s2);

		if (($s1) != ($s2)) {
			for ($j=0,$k=strlen($s1); $j < $k; $j++) {
				if ($s1[$j] != $s2[$j]) {
					print substr($s1,$j).' ';
					break;
				}
			}
			print "<b>Error date(): $ts<br><pre> 
&nbsp; \"$s1\" (date len=".strlen($s1).")
&nbsp; \"$s2\" (adodb_date len=".strlen($s2).")</b></pre><br>";
			$fail = true;
		}
		
		$a1 = getdate($ts);
		$a2 = adodb_getdate($ts);
		$rez = array_diff($a1,$a2);
		if (sizeof($rez)>0) {
			print "<b>Error getdate() $ts</b><br>";
				print_r($a1);
			print "<br>";
				print_r($a2);
			print "<p>";
			$fail = true;
		}
	}
	
	// Test generation of dates outside 1901-2038
	print "<p>Testing random dates between 100 and 4000</p>";
	adodb_date_test_date(100,1);
	for ($i=100; --$i >= 0;) {
		$y1 = 100+rand(0,1970-100);
		$m = rand(1,12);
		adodb_date_test_date($y1,$m);
		
		$y1 = 3000-rand(0,3000-1970);
		adodb_date_test_date($y1,$m);
	}
	print '<p>';
	$start = 1960+rand(0,10);
	$yrs = 12;
	$i = 365.25*86400*($start-1970);
	$offset = 36000+rand(10000,60000);
	$max = 365*$yrs*86400;
	$lastyear = 0;
	
	// we generate a timestamp, convert it to a date, and convert it back to a timestamp
	// and check if the roundtrip broke the original timestamp value.
	print "Testing $start to ".($start+$yrs).", or $max seconds, offset=$offset: ";
	$cnt = 0;
	for ($max += $i; $i < $max; $i += $offset) {
		$ret = adodb_date('m,d,Y,H,i,s',$i);
		$arr = explode(',',$ret);
		if ($lastyear != $arr[2]) {
			$lastyear = $arr[2];
			print " $lastyear ";
			flush();
		}
		$newi = adodb_mktime($arr[3],$arr[4],$arr[5],$arr[0],$arr[1],$arr[2]);
		if ($i != $newi) {
			print "Error at $i, adodb_mktime returned $newi ($ret)";
			$fail = true;
			break;
		}
		$cnt += 1;
	}
	echo "Tested $cnt dates<br>";
	if (!$fail) print "<p>Passed !</p>";
	else print "<p><b>Failed</b> :-(</p>";
}

/**
	Returns day of week, 0 = Sunday,... 6=Saturday. 
	Algorithm from PEAR::Date_Calc
*/
function adodb_dow($year, $month, $day)
{
/*
Pope Gregory removed 10 days - October 5 to October 14 - from the year 1582 and 
proclaimed that from that time onwards 3 days would be dropped from the calendar 
every 400 years.

Thursday, October 4, 1582 (Julian) was followed immediately by Friday, October 15, 1582 (Gregorian). 
*/
	if ($year <= 1582) {
		if ($year < 1582 || 
			($year == 1582 && ($month < 10 || ($month == 10 && $day < 15)))) $greg_correction = 3;
		 else
			$greg_correction = 0;
	} else
		$greg_correction = 0;
	
	if($month > 2)
	  $month -= 2;
	else {
	  $month += 10;
	  $year--;
	}
	
	$day =  floor((13 * $month - 1) / 5) +
	    $day + ($year % 100) +
	    floor(($year % 100) / 4) +
	    floor(($year / 100) / 4) - 2 *
	    floor($year / 100) + 77 + $greg_correction;
	
	return $day - 7 * floor($day / 7);
}


/**
 Checks for leap year, returns true if it is. No 2-digit year check. Also 
 handles julian calendar correctly.
*/
function _adodb_is_leap_year($year) 
{
	if ($year % 4 != 0) return false;
	
	if ($year % 400 == 0) {
		return true;
	// if gregorian calendar (>1582), century not-divisible by 400 is not leap
	} else if ($year > 1582 && $year % 100 == 0 ) {
		return false;
	} 
	
	return true;
}


/**
 checks for leap year, returns true if it is. Has 2-digit year check
*/
function adodb_is_leap_year($year) 
{
	return  _adodb_is_leap_year(adodb_year_digit_check($year));
}

/**
	Fix 2-digit years. Works for any century.
 	Assumes that if 2-digit is more than 30 years in future, then previous century.
*/
function adodb_year_digit_check($y) 
{
	if ($y < 100) {
	
		$yr = (integer) date("Y");
		$century = (integer) ($yr /100);
		
		if ($yr%100 > 50) {
			$c1 = $century + 1;
			$c0 = $century;
		} else {
			$c1 = $century;
			$c0 = $century - 1;
		}
		$c1 *= 100;
		// if 2-digit year is less than 30 years in future, set it to this century
		// otherwise if more than 30 years in future, then we set 2-digit year to the prev century.
		if (($y + $c1) < $yr+30) $y = $y + $c1;
		else $y = $y + $c0*100;
	}
	return $y;
}

/**
 get local time zone offset from GMT
*/
function adodb_get_gmt_diff() 
{
static $TZ;
	if (isset($TZ)) return $TZ;
	
	$TZ = mktime(0,0,0,1,2,1970,0) - gmmktime(0,0,0,1,2,1970,0);
	return $TZ;
}

/**
	Returns an array with date info.
*/
function adodb_getdate($d=false,$fast=false)
{
	if ($d === false) return getdate();
	if (!defined('ADODB_TEST_DATES')) {
		if ((abs($d) <= 0x7FFFFFFF)) { // check if number in 32-bit signed range
			if (!defined('ADODB_NO_NEGATIVE_TS') || $d >= 0) // if windows, must be +ve integer
				return @getdate($d);
		}
	}
	return _adodb_getdate($d);
}

/*
// generate $YRS table for _adodb_getdate()
function adodb_date_gentable($out=true)
{

	for ($i=1970; $i >= 1600; $i-=10) {
		$s = adodb_gmmktime(0,0,0,1,1,$i);
		echo "$i => $s,<br>";	
	}
}
adodb_date_gentable();

for ($i=1970; $i > 1500; $i--) {

echo "<hr />$i ";
	adodb_date_test_date($i,1,1);
}

*/


$_month_table_normal = array("",31,28,31,30,31,30,31,31,30,31,30,31);
$_month_table_leaf = array("",31,29,31,30,31,30,31,31,30,31,30,31);
	
function adodb_validdate($y,$m,$d)
{
global $_month_table_normal,$_month_table_leaf;

	if (_adodb_is_leap_year($y)) $marr = $_month_table_leaf;
	else $marr = $_month_table_normal;
	
	if ($m > 12 || $m < 1) return false;
	
	if ($d > 31 || $d < 1) return false;
	
	if ($marr[$m] < $d) return false;
	
	if ($y < 1000 && $y > 3000) return false;
	
	return true;
}

/**
	Low-level function that returns the getdate() array. We have a special
	$fast flag, which if set to true, will return fewer array values,
	and is much faster as it does not calculate dow, etc.
*/
function _adodb_getdate($origd=false,$fast=false,$is_gmt=false)
{
static $YRS;
global $_month_table_normal,$_month_table_leaf;

	$d =  $origd - ($is_gmt ? 0 : adodb_get_gmt_diff());
	
	$_day_power = 86400;
	$_hour_power = 3600;
	$_min_power = 60;
	
	if ($d < -12219321600) $d -= 86400*10; // if 15 Oct 1582 or earlier, gregorian correction 
	
	$_month_table_normal = array("",31,28,31,30,31,30,31,31,30,31,30,31);
	$_month_table_leaf = array("",31,29,31,30,31,30,31,31,30,31,30,31);
	
	$d366 = $_day_power * 366;
	$d365 = $_day_power * 365;
	
	if ($d < 0) {
		
		if (empty($YRS)) $YRS = array(
			1970 => 0,
			1960 => -315619200,
			1950 => -631152000,
			1940 => -946771200,
			1930 => -1262304000,
			1920 => -1577923200,
			1910 => -1893456000,
			1900 => -2208988800,
			1890 => -2524521600,
			1880 => -2840140800,
			1870 => -3155673600,
			1860 => -3471292800,
			1850 => -3786825600,
			1840 => -4102444800,
			1830 => -4417977600,
			1820 => -4733596800,
			1810 => -5049129600,
			1800 => -5364662400,
			1790 => -5680195200,
			1780 => -5995814400,
			1770 => -6311347200,
			1760 => -6626966400,
			1750 => -6942499200,
			1740 => -7258118400,
			1730 => -7573651200,
			1720 => -7889270400,
			1710 => -8204803200,
			1700 => -8520336000,
			1690 => -8835868800,
			1680 => -9151488000,
			1670 => -9467020800,
			1660 => -9782640000,
			1650 => -10098172800,
			1640 => -10413792000,
			1630 => -10729324800,
			1620 => -11044944000,
			1610 => -11360476800,
			1600 => -11676096000);

		if ($is_gmt) $origd = $d;
		// The valid range of a 32bit signed timestamp is typically from 
		// Fri, 13 Dec 1901 20:45:54 GMT to Tue, 19 Jan 2038 03:14:07 GMT
		//
		
		# old algorithm iterates through all years. new algorithm does it in
		# 10 year blocks
		
		/*
		# old algo
		for ($a = 1970 ; --$a >= 0;) {
			$lastd = $d;
			
			if ($leaf = _adodb_is_leap_year($a)) $d += $d366;
			else $d += $d365;
			
			if ($d >= 0) {
				$year = $a;
				break;
			}
		}
		*/
		
		$lastsecs = 0;
		$lastyear = 1970;
		foreach($YRS as $year => $secs) {
			if ($d >= $secs) {
				$a = $lastyear;
				break;
			}
			$lastsecs = $secs;
			$lastyear = $year;
		}
		
		$d -= $lastsecs;
		if (!isset($a)) $a = $lastyear;
		
		//echo ' yr=',$a,' ', $d,'.';
		
		for (; --$a >= 0;) {
			$lastd = $d;
			
			if ($leaf = _adodb_is_leap_year($a)) $d += $d366;
			else $d += $d365;
			
			if ($d >= 0) {
				$year = $a;
				break;
			}
		}
		/**/
		
		$secsInYear = 86400 * ($leaf ? 366 : 365) + $lastd;
		
		$d = $lastd;
		$mtab = ($leaf) ? $_month_table_leaf : $_month_table_normal;
		for ($a = 13 ; --$a > 0;) {
			$lastd = $d;
			$d += $mtab[$a] * $_day_power;
			if ($d >= 0) {
				$month = $a;
				$ndays = $mtab[$a];
				break;
			}
		}
		
		$d = $lastd;
		$day = $ndays + ceil(($d+1) / ($_day_power));

		$d += ($ndays - $day+1)* $_day_power;
		$hour = floor($d/$_hour_power);
	
	} else {
		for ($a = 1970 ;; $a++) {
			$lastd = $d;
			
			if ($leaf = _adodb_is_leap_year($a)) $d -= $d366;
			else $d -= $d365;
			if ($d < 0) {
				$year = $a;
				break;
			}
		}
		$secsInYear = $lastd;
		$d = $lastd;
		$mtab = ($leaf) ? $_month_table_leaf : $_month_table_normal;
		for ($a = 1 ; $a <= 12; $a++) {
			$lastd = $d;
			$d -= $mtab[$a] * $_day_power;
			if ($d < 0) {
				$month = $a;
				$ndays = $mtab[$a];
				break;
			}
		}
		$d = $lastd;
		$day = ceil(($d+1) / $_day_power);
		$d = $d - ($day-1) * $_day_power;
		$hour = floor($d /$_hour_power);
	}
	
	$d -= $hour * $_hour_power;
	$min = floor($d/$_min_power);
	$secs = $d - $min * $_min_power;
	if ($fast) {
		return array(
		'seconds' => $secs,
		'minutes' => $min,
		'hours' => $hour,
		'mday' => $day,
		'mon' => $month,
		'year' => $year,
		'yday' => floor($secsInYear/$_day_power),
		'leap' => $leaf,
		'ndays' => $ndays
		);
	}
	
	
	$dow = adodb_dow($year,$month,$day);

	return array(
		'seconds' => $secs,
		'minutes' => $min,
		'hours' => $hour,
		'mday' => $day,
		'wday' => $dow,
		'mon' => $month,
		'year' => $year,
		'yday' => floor($secsInYear/$_day_power),
		'weekday' => gmdate('l',$_day_power*(3+$dow)),
		'month' => gmdate('F',mktime(0,0,0,$month,2,1971)),
		0 => $origd
	);
}

function adodb_gmdate($fmt,$d=false)
{
	return adodb_date($fmt,$d,true);
}

// accepts unix timestamp and iso date format in $d
function adodb_date2($fmt, $d=false, $is_gmt=false)
{
	if ($d !== false) {
		if (!preg_match( 
			"|^([0-9]{4})[-/\.]?([0-9]{1,2})[-/\.]?([0-9]{1,2})[ -]?(([0-9]{1,2}):?([0-9]{1,2}):?([0-9\.]{1,4}))?|", 
			($d), $rr)) return adodb_date($fmt,false,$is_gmt);

		if ($rr[1] <= 100 && $rr[2]<= 1) return adodb_date($fmt,false,$is_gmt);
	
		// h-m-s-MM-DD-YY
		if (!isset($rr[5])) $d = adodb_mktime(0,0,0,$rr[2],$rr[3],$rr[1],false,$is_gmt);
		else $d = @adodb_mktime($rr[5],$rr[6],$rr[7],$rr[2],$rr[3],$rr[1],false,$is_gmt);
	}
	
	return adodb_date($fmt,$d,$is_gmt);
}


/**
	Return formatted date based on timestamp $d
*/
function adodb_date($fmt,$d=false,$is_gmt=false)
{
static $daylight;

	if ($d === false) return ($is_gmt)? @gmdate($fmt): @date($fmt);
	if (!defined('ADODB_TEST_DATES')) {
		if ((abs($d) <= 0x7FFFFFFF)) { // check if number in 32-bit signed range
			if (!defined('ADODB_NO_NEGATIVE_TS') || $d >= 0) // if windows, must be +ve integer
				return ($is_gmt)? @gmdate($fmt,$d): @date($fmt,$d);

		}
	}
	$_day_power = 86400;
	
	$arr = _adodb_getdate($d,true,$is_gmt);
	
	if (!isset($daylight)) $daylight = function_exists('adodb_daylight_sv');
	if ($daylight) adodb_daylight_sv($arr, $is_gmt);
	
	$year = $arr['year'];
	$month = $arr['mon'];
	$day = $arr['mday'];
	$hour = $arr['hours'];
	$min = $arr['minutes'];
	$secs = $arr['seconds'];
	
	$max = strlen($fmt);
	$dates = '';
	
	$isphp5 = PHP_VERSION >= 5;
	
	/*
		at this point, we have the following integer vars to manipulate:
		$year, $month, $day, $hour, $min, $secs
	*/
	for ($i=0; $i < $max; $i++) {
		switch($fmt[$i]) {
		case 'T': $dates .= date('T');break;
		// YEAR
		case 'L': $dates .= $arr['leap'] ? '1' : '0'; break;
		case 'r': // Thu, 21 Dec 2000 16:01:07 +0200
		
			// 4.3.11 uses '04 Jun 2004'
			// 4.3.8 uses  ' 4 Jun 2004'
			$dates .= gmdate('D',$_day_power*(3+adodb_dow($year,$month,$day))).', '		
				. ($day<10?'0'.$day:$day) . ' '.date('M',mktime(0,0,0,$month,2,1971)).' '.$year.' ';
			
			if ($hour < 10) $dates .= '0'.$hour; else $dates .= $hour; 
			
			if ($min < 10) $dates .= ':0'.$min; else $dates .= ':'.$min;
			
			if ($secs < 10) $dates .= ':0'.$secs; else $dates .= ':'.$secs;
			
			$gmt = adodb_get_gmt_diff();
			if ($isphp5) 
				$dates .= sprintf(' %s%04d',($gmt<=0)?'+':'-',abs($gmt)/36); 
			else
				$dates .= sprintf(' %s%04d',($gmt<0)?'+':'-',abs($gmt)/36); 
			break;
				
		case 'Y': $dates .= $year; break;
		case 'y': $dates .= substr($year,strlen($year)-2,2); break;
		// MONTH
		case 'm': if ($month<10) $dates .= '0'.$month; else $dates .= $month; break;
		case 'Q': $dates .= ($month+3)>>2; break;
		case 'n': $dates .= $month; break;
		case 'M': $dates .= date('M',mktime(0,0,0,$month,2,1971)); break;
		case 'F': $dates .= date('F',mktime(0,0,0,$month,2,1971)); break;
		// DAY
		case 't': $dates .= $arr['ndays']; break;
		case 'z': $dates .= $arr['yday']; break;
		case 'w': $dates .= adodb_dow($year,$month,$day); break;
		case 'l': $dates .= gmdate('l',$_day_power*(3+adodb_dow($year,$month,$day))); break;
		case 'D': $dates .= gmdate('D',$_day_power*(3+adodb_dow($year,$month,$day))); break;
		case 'j': $dates .= $day; break;
		case 'd': if ($day<10) $dates .= '0'.$day; else $dates .= $day; break;
		case 'S': 
			$d10 = $day % 10;
			if ($d10 == 1) $dates .= 'st';
			else if ($d10 == 2 && $day != 12) $dates .= 'nd';
			else if ($d10 == 3) $dates .= 'rd';
			else $dates .= 'th';
			break;
			
		// HOUR
		case 'Z':
			$dates .= ($is_gmt) ? 0 : -adodb_get_gmt_diff(); break;
		case 'O': 
			$gmt = ($is_gmt) ? 0 : adodb_get_gmt_diff();
			
			if ($isphp5)
				$dates .= sprintf('%s%04d',($gmt<=0)?'+':'-',abs($gmt)/36); 
			else
				$dates .= sprintf('%s%04d',($gmt<0)?'+':'-',abs($gmt)/36); 
			break;
			
		case 'H': 
			if ($hour < 10) $dates .= '0'.$hour; 
			else $dates .= $hour; 
			break;
		case 'h': 
			if ($hour > 12) $hh = $hour - 12; 
			else {
				if ($hour == 0) $hh = '12'; 
				else $hh = $hour;
			}
			
			if ($hh < 10) $dates .= '0'.$hh;
			else $dates .= $hh;
			break;
			
		case 'G': 
			$dates .= $hour;
			break;
			
		case 'g':
			if ($hour > 12) $hh = $hour - 12; 
			else {
				if ($hour == 0) $hh = '12'; 
				else $hh = $hour; 
			}
			$dates .= $hh;
			break;
		// MINUTES
		case 'i': if ($min < 10) $dates .= '0'.$min; else $dates .= $min; break;
		// SECONDS
		case 'U': $dates .= $d; break;
		case 's': if ($secs < 10) $dates .= '0'.$secs; else $dates .= $secs; break;
		// AM/PM
		// Note 00:00 to 11:59 is AM, while 12:00 to 23:59 is PM
		case 'a':
			if ($hour>=12) $dates .= 'pm';
			else $dates .= 'am';
			break;
		case 'A':
			if ($hour>=12) $dates .= 'PM';
			else $dates .= 'AM';
			break;
		default:
			$dates .= $fmt[$i]; break;
		// ESCAPE
		case "\\": 
			$i++;
			if ($i < $max) $dates .= $fmt[$i];
			break;
		}
	}
	return $dates;
}

/**
	Returns a timestamp given a GMT/UTC time. 
	Note that $is_dst is not implemented and is ignored.
*/
function adodb_gmmktime($hr,$min,$sec,$mon=false,$day=false,$year=false,$is_dst=false)
{
	return adodb_mktime($hr,$min,$sec,$mon,$day,$year,$is_dst,true);
}

/**
	Return a timestamp given a local time. Originally by jackbbs.
	Note that $is_dst is not implemented and is ignored.
	
	Not a very fast algorithm - O(n) operation. Could be optimized to O(1).
*/
function adodb_mktime($hr,$min,$sec,$mon=false,$day=false,$year=false,$is_dst=false,$is_gmt=false) 
{
	if (!defined('ADODB_TEST_DATES')) {

		if ($mon === false) {
			return $is_gmt? @gmmktime($hr,$min,$sec): @mktime($hr,$min,$sec);
		}
		
		// for windows, we don't check 1970 because with timezone differences, 
		// 1 Jan 1970 could generate negative timestamp, which is illegal
		if (1971 < $year && $year < 2038
			|| !defined('ADODB_NO_NEGATIVE_TS') && (1901 < $year && $year < 2038)
			) {
				return $is_gmt ?
					@gmmktime($hr,$min,$sec,$mon,$day,$year):
					@mktime($hr,$min,$sec,$mon,$day,$year);
			}
	}
	
	$gmt_different = ($is_gmt) ? 0 : adodb_get_gmt_diff();

	/*
	# disabled because some people place large values in $sec.
	# however we need it for $mon because we use an array...
	$hr = intval($hr);
	$min = intval($min);
	$sec = intval($sec);
	*/
	$mon = intval($mon);
	$day = intval($day);
	$year = intval($year);
	
	
	$year = adodb_year_digit_check($year);

	if ($mon > 12) {
		$y = floor($mon / 12);
		$year += $y;
		$mon -= $y*12;
	} else if ($mon < 1) {
		$y = ceil((1-$mon) / 12);
		$year -= $y;
		$mon += $y*12;
	}
	
	$_day_power = 86400;
	$_hour_power = 3600;
	$_min_power = 60;
	
	$_month_table_normal = array("",31,28,31,30,31,30,31,31,30,31,30,31);
	$_month_table_leaf = array("",31,29,31,30,31,30,31,31,30,31,30,31);
	
	$_total_date = 0;
	if ($year >= 1970) {
		for ($a = 1970 ; $a <= $year; $a++) {
			$leaf = _adodb_is_leap_year($a);
			if ($leaf == true) {
				$loop_table = $_month_table_leaf;
				$_add_date = 366;
			} else {
				$loop_table = $_month_table_normal;
				$_add_date = 365;
			}
			if ($a < $year) { 
				$_total_date += $_add_date;
			} else {
				for($b=1;$b<$mon;$b++) {
					$_total_date += $loop_table[$b];
				}
			}
		}
		$_total_date +=$day-1;
		$ret = $_total_date * $_day_power + $hr * $_hour_power + $min * $_min_power + $sec + $gmt_different;
	
	} else {
		for ($a = 1969 ; $a >= $year; $a--) {
			$leaf = _adodb_is_leap_year($a);
			if ($leaf == true) {
				$loop_table = $_month_table_leaf;
				$_add_date = 366;
			} else {
				$loop_table = $_month_table_normal;
				$_add_date = 365;
			}
			if ($a > $year) { $_total_date += $_add_date;
			} else {
				for($b=12;$b>$mon;$b--) {
					$_total_date += $loop_table[$b];
				}
			}
		}
		$_total_date += $loop_table[$mon] - $day;
		
		$_day_time = $hr * $_hour_power + $min * $_min_power + $sec;
		$_day_time = $_day_power - $_day_time;
		$ret = -( $_total_date * $_day_power + $_day_time - $gmt_different);
		if ($ret < -12220185600) $ret += 10*86400; // if earlier than 5 Oct 1582 - gregorian correction
		else if ($ret < -12219321600) $ret = -12219321600; // if in limbo, reset to 15 Oct 1582.
	} 
	//print " dmy=$day/$mon/$year $hr:$min:$sec => " .$ret;
	return $ret;
}

function adodb_gmstrftime($fmt, $ts=false)
{
	return adodb_strftime($fmt,$ts,true);
}

// hack - convert to adodb_date
function adodb_strftime($fmt, $ts=false,$is_gmt=false)
{
global $ADODB_DATE_LOCALE;

	if (!defined('ADODB_TEST_DATES')) {
		if ((abs($ts) <= 0x7FFFFFFF)) { // check if number in 32-bit signed range
			if (!defined('ADODB_NO_NEGATIVE_TS') || $ts >= 0) // if windows, must be +ve integer
				return ($is_gmt)? @gmstrftime($fmt,$ts): @strftime($fmt,$ts);

		}
	}
	
	if (empty($ADODB_DATE_LOCALE)) {
	/*
		$tstr = strtoupper(gmstrftime('%c',31366800)); // 30 Dec 1970, 1 am
		$sep = substr($tstr,2,1);
		$hasAM = strrpos($tstr,'M') !== false;
	*/
		# see http://phplens.com/lens/lensforum/msgs.php?id=14865 for reasoning, and changelog for version 0.24
		$dstr = gmstrftime('%x',31366800); // 30 Dec 1970, 1 am
		$sep = substr($dstr,2,1);
		$tstr = strtoupper(gmstrftime('%X',31366800)); // 30 Dec 1970, 1 am
		$hasAM = strrpos($tstr,'M') !== false;
		
		$ADODB_DATE_LOCALE = array();
		$ADODB_DATE_LOCALE[] =  strncmp($tstr,'30',2) == 0 ? 'd'.$sep.'m'.$sep.'y' : 'm'.$sep.'d'.$sep.'y';	
		$ADODB_DATE_LOCALE[]  = ($hasAM) ? 'h:i:s a' : 'H:i:s';
			
	}
	$inpct = false;
	$fmtdate = '';
	for ($i=0,$max = strlen($fmt); $i < $max; $i++) {
		$ch = $fmt[$i];
		if ($ch == '%') {
			if ($inpct) {
				$fmtdate .= '%';
				$inpct = false;
			} else
				$inpct = true;
		} else if ($inpct) {
		
			$inpct = false;
			switch($ch) {
			case '0':
			case '1':
			case '2':
			case '3':
			case '4':
			case '5':
			case '6':
			case '7':
			case '8':
			case '9':
			case 'E':
			case 'O':
				/* ignore format modifiers */
				$inpct = true; 
				break;
				
			case 'a': $fmtdate .= 'D'; break;
			case 'A': $fmtdate .= 'l'; break;
			case 'h':
			case 'b': $fmtdate .= 'M'; break;
			case 'B': $fmtdate .= 'F'; break;
			case 'c': $fmtdate .= $ADODB_DATE_LOCALE[0].$ADODB_DATE_LOCALE[1]; break;
			case 'C': $fmtdate .= '\C?'; break; // century
			case 'd': $fmtdate .= 'd'; break;
			case 'D': $fmtdate .= 'm/d/y'; break;
			case 'e': $fmtdate .= 'j'; break;
			case 'g': $fmtdate .= '\g?'; break; //?
			case 'G': $fmtdate .= '\G?'; break; //?
			case 'H': $fmtdate .= 'H'; break;
			case 'I': $fmtdate .= 'h'; break;
			case 'j': $fmtdate .= '?z'; $parsej = true; break; // wrong as j=1-based, z=0-basd
			case 'm': $fmtdate .= 'm'; break;
			case 'M': $fmtdate .= 'i'; break;
			case 'n': $fmtdate .= "\n"; break;
			case 'p': $fmtdate .= 'a'; break;
			case 'r': $fmtdate .= 'h:i:s a'; break;
			case 'R': $fmtdate .= 'H:i:s'; break;
			case 'S': $fmtdate .= 's'; break;
			case 't': $fmtdate .= "\t"; break;
			case 'T': $fmtdate .= 'H:i:s'; break;
			case 'u': $fmtdate .= '?u'; $parseu = true; break; // wrong strftime=1-based, date=0-based
			case 'U': $fmtdate .= '?U'; $parseU = true; break;// wrong strftime=1-based, date=0-based
			case 'x': $fmtdate .= $ADODB_DATE_LOCALE[0]; break;
			case 'X': $fmtdate .= $ADODB_DATE_LOCALE[1]; break;
			case 'w': $fmtdate .= '?w'; $parseu = true; break; // wrong strftime=1-based, date=0-based
			case 'W': $fmtdate .= '?W'; $parseU = true; break;// wrong strftime=1-based, date=0-based
			case 'y': $fmtdate .= 'y'; break;
			case 'Y': $fmtdate .= 'Y'; break;
			case 'Z': $fmtdate .= 'T'; break;
			}
		} else if (('A' <= ($ch) && ($ch) <= 'Z' ) || ('a' <= ($ch) && ($ch) <= 'z' ))
			$fmtdate .= "\\".$ch;
		else
			$fmtdate .= $ch;
	}
	//echo "fmt=",$fmtdate,"<br>";
	if ($ts === false) $ts = time();
	$ret = adodb_date($fmtdate, $ts, $is_gmt);
	return $ret;
}


?>
Back to Top