aboutsummaryrefslogtreecommitdiffstats
path: root/BSF/include/functions.inc.php
blob: a1b589999f0bcfc4caf4bbc44793378717164e55 (plain)
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
1338
1339
1340
1341
1342
1343
1344
1345
1346
1347
1348
1349
1350
1351
1352
1353
1354
1355
1356
1357
1358
1359
1360
1361
1362
1363
1364
1365
1366
1367
1368
1369
1370
1371
1372
1373
1374
1375
1376
1377
1378
1379
1380
1381
1382
1383
1384
1385
1386
1387
1388
1389
1390
1391
1392
1393
1394
1395
1396
1397
1398
1399
1400
1401
1402
1403
1404
1405
1406
1407
1408
1409
1410
1411
1412
1413
1414
1415
1416
1417
1418
1419
1420
1421
1422
1423
1424
1425
1426
1427
1428
1429
1430
1431
1432
1433
1434
1435
1436
1437
1438
1439
1440
1441
1442
1443
1444
1445
1446
1447
1448
1449
1450
1451
1452
1453
1454
1455
1456
1457
1458
1459
1460
1461
1462
1463
1464
1465
1466
1467
1468
1469
1470
1471
1472
1473
1474
1475
1476
1477
1478
1479
1480
1481
1482
1483
1484
1485
1486
1487
1488
1489
1490
1491
1492
1493
1494
1495
1496
1497
1498
1499
1500
1501
1502
1503
1504
1505
1506
1507
1508
1509
1510
1511
1512
1513
1514
1515
1516
1517
1518
1519
1520
1521
1522
1523
1524
1525
1526
1527
1528
1529
1530
1531
1532
1533
1534
1535
1536
1537
1538
1539
1540
1541
1542
1543
1544
1545
1546
1547
1548
1549
1550
1551
1552
1553
1554
1555
1556
1557
<?php
// +-----------------------------------------------------------------------+
// | Piwigo - a PHP based picture gallery                                  |
// +-----------------------------------------------------------------------+
// | Copyright(C) 2008      Piwigo Team                  http://piwigo.org |
// | Copyright(C) 2003-2008 PhpWebGallery Team    http://phpwebgallery.net |
// | Copyright(C) 2002-2003 Pierrick LE GALL   http://le-gall.net/pierrick |
// +-----------------------------------------------------------------------+
// | This program is free software; you can redistribute it and/or modify  |
// | it under the terms of the GNU General Public License as published by  |
// | the Free Software Foundation                                          |
// |                                                                       |
// | This program is distributed in the hope that it will be useful, but   |
// | WITHOUT ANY WARRANTY; without even the implied warranty of            |
// | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU      |
// | General Public License for more details.                              |
// |                                                                       |
// | You should have received a copy of the GNU General Public License     |
// | along with this program; if not, write to the Free Software           |
// | Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, |
// | USA.                                                                  |
// +-----------------------------------------------------------------------+

include_once( PHPWG_ROOT_PATH .'include/functions_user.inc.php' );
include_once( PHPWG_ROOT_PATH .'include/functions_cookie.inc.php' );
include_once( PHPWG_ROOT_PATH .'include/functions_session.inc.php' );
include_once( PHPWG_ROOT_PATH .'include/functions_category.inc.php' );
include_once( PHPWG_ROOT_PATH .'include/functions_xml.inc.php' );
include_once( PHPWG_ROOT_PATH .'include/functions_group.inc.php' );
include_once( PHPWG_ROOT_PATH .'include/functions_html.inc.php' );
include_once( PHPWG_ROOT_PATH .'include/functions_tag.inc.php' );
include_once( PHPWG_ROOT_PATH .'include/functions_url.inc.php' );
include_once( PHPWG_ROOT_PATH .'include/functions_plugins.inc.php' );

//----------------------------------------------------------- generic functions

/**
 * returns an array containing the possible values of an enum field
 *
 * @param string tablename
 * @param string fieldname
 */
function get_enums($table, $field)
{
  // retrieving the properties of the table. Each line represents a field :
  // columns are 'Field', 'Type'
  $result = pwg_query('desc '.$table);
  while ($row = mysql_fetch_array($result))
  {
    // we are only interested in the the field given in parameter for the
    // function
    if ($row['Field'] == $field)
    {
      // retrieving possible values of the enum field
      // enum('blue','green','black')
      $options = explode(',', substr($row['Type'], 5, -1));
      foreach ($options as $i => $option)
      {
        $options[$i] = str_replace("'", '',$option);
      }
    }
  }
  mysql_free_result($result);
  return $options;
}

// get_boolean transforms a string to a boolean value. If the string is
// "false" (case insensitive), then the boolean value false is returned. In
// any other case, true is returned.
function get_boolean( $string )
{
  $boolean = true;
  if ( preg_match( '/^false$/i', $string ) )
  {
    $boolean = false;
  }
  return $boolean;
}

/**
 * returns boolean string 'true' or 'false' if the given var is boolean
 *
 * @param mixed $var
 * @return mixed
 */
function boolean_to_string($var)
{
  if (is_bool($var))
  {
    if ($var)
    {
      return 'true';
    }
    else
    {
      return 'false';
    }
  }
  else
  {
    return $var;
  }
}

// The function get_moment returns a float value coresponding to the number
// of seconds since the unix epoch (1st January 1970) and the microseconds
// are precised : e.g. 1052343429.89276600
function get_moment()
{
  $t1 = explode( ' ', microtime() );
  $t2 = explode( '.', $t1[0] );
  $t2 = $t1[1].'.'.$t2[1];
  return $t2;
}

// The function get_elapsed_time returns the number of seconds (with 3
// decimals precision) between the start time and the end time given.
function get_elapsed_time( $start, $end )
{
  return number_format( $end - $start, 3, '.', ' ').' s';
}

// - The replace_space function replaces space and '-' characters
//   by their HTML equivalent  &nbsb; and &minus;
// - The function does not replace characters in HTML tags
// - This function was created because IE5 does not respect the
//   CSS "white-space: nowrap;" property unless space and minus
//   characters are replaced like this function does.
// - Example :
//                 <div class="foo">My friend</div>
//               ( 01234567891111111111222222222233 )
//               (           0123456789012345678901 )
// becomes :
//             <div class="foo">My&nbsp;friend</div>
function replace_space( $string )
{
  //return $string;
  $return_string = '';
  // $remaining is the rest of the string where to replace spaces characters
  $remaining = $string;
  // $start represents the position of the next '<' character
  // $end   represents the position of the next '>' character
  $start = 0;
  $end = 0;
  $start = strpos ( $remaining, '<' ); // -> 0
  $end   = strpos ( $remaining, '>' ); // -> 16
  // as long as a '<' and his friend '>' are found, we loop
  while ( is_numeric( $start ) and is_numeric( $end ) )
  {
    // $treatment is the part of the string to treat
    // In the first loop of our example, this variable is empty, but in the
    // second loop, it equals 'My friend'
    $treatment = substr ( $remaining, 0, $start );
    // Replacement of ' ' by his equivalent '&nbsp;'
    $treatment = str_replace( ' ', '&nbsp;', $treatment );
    $treatment = str_replace( '-', '&minus;', $treatment );
    // composing the string to return by adding the treated string and the
    // following HTML tag -> 'My&nbsp;friend</div>'
    $return_string.= $treatment.substr( $remaining, $start, $end-$start+1 );
    // the remaining string is deplaced to the part after the '>' of this
    // loop
    $remaining = substr ( $remaining, $end + 1, strlen( $remaining ) );
    $start = strpos ( $remaining, '<' );
    $end   = strpos ( $remaining, '>' );
  }
  $treatment = str_replace( ' ', '&nbsp;', $remaining );
  $treatment = str_replace( '-', '&minus;', $treatment );
  $return_string.= $treatment;

  return $return_string;
}

// get_extension returns the part of the string after the last "."
function get_extension( $filename )
{
  return substr( strrchr( $filename, '.' ), 1, strlen ( $filename ) );
}

// get_filename_wo_extension returns the part of the string before the last
// ".".
// get_filename_wo_extension( 'test.tar.gz' ) -> 'test.tar'
function get_filename_wo_extension( $filename )
{
  $pos = strrpos( $filename, '.' );
  return ($pos===false) ? $filename : substr( $filename, 0, $pos);
}

/**
 * returns an array contening sub-directories, excluding "CVS"
 *
 * @param string $dir
 * @return array
 */
function get_dirs($directory)
{
  $sub_dirs = array();

  if ($opendir = opendir($directory))
  {
    while ($file = readdir($opendir))
    {
      if ($file != '.'
          and $file != '..'
          and is_dir($directory.'/'.$file)
          and $file != 'CVS'
    and $file != '.svn')
      {
        array_push($sub_dirs, $file);
      }
    }
  }
  return $sub_dirs;
}

/**
 * returns thumbnail directory name of input diretoty name
 * make thumbnail directory is necessary
 * set error messages on array messages
 *
 * @param:
 *  string $dirname
 *  arrayy $errors
 * @return bool false on error else string directory name
 */
function mkget_thumbnail_dir($dirname, &$errors)
{
  $tndir = $dirname.'/thumbnail';
  if (!is_dir($tndir))
  {
    if (!is_writable($dirname))
    {
      array_push($errors,
                 '['.$dirname.'] : '.l10n('no_write_access'));
      return false;
    }
    umask(0000);
    mkdir($tndir, 0777);
  }

  return $tndir;
}

// The get_picture_size function return an array containing :
//      - $picture_size[0] : final width
//      - $picture_size[1] : final height
// The final dimensions are calculated thanks to the original dimensions and
// the maximum dimensions given in parameters.  get_picture_size respects
// the width/height ratio
function get_picture_size( $original_width, $original_height,
                           $max_width, $max_height )
{
  $width = $original_width;
  $height = $original_height;
  $is_original_size = true;

  if ( $max_width != "" )
  {
    if ( $original_width > $max_width )
    {
      $width = $max_width;
      $height = floor( ( $width * $original_height ) / $original_width );
    }
  }
  if ( $max_height != "" )
  {
    if ( $original_height > $max_height )
    {
      $height = $max_height;
      $width = floor( ( $height * $original_width ) / $original_height );
      $is_original_size = false;
    }
  }
  if ( is_numeric( $max_width ) and is_numeric( $max_height )
       and $max_width != 0 and $max_height != 0 )
  {
    $ratioWidth = $original_width / $max_width;
    $ratioHeight = $original_height / $max_height;
    if ( ( $ratioWidth > 1 ) or ( $ratioHeight > 1 ) )
    {
      if ( $ratioWidth < $ratioHeight )
      {
        $width = floor( $original_width / $ratioHeight );
        $height = $max_height;
      }
      else
      {
        $width = $max_width;
        $height = floor( $original_height / $ratioWidth );
      }
      $is_original_size = false;
    }
  }
  $picture_size = array();
  $picture_size[0] = $width;
  $picture_size[1] = $height;
  return $picture_size;
}

/* Returns true if the string appears to be encoded in UTF-8. (from wordpress)
 * @param string Str
 */
function seems_utf8($Str) { # by bmorel at ssi dot fr
  for ($i=0; $i<strlen($Str); $i++) {
    if (ord($Str[$i]) < 0x80) continue; # 0bbbbbbb
    elseif ((ord($Str[$i]) & 0xE0) == 0xC0) $n=1; # 110bbbbb
    elseif ((ord($Str[$i]) & 0xF0) == 0xE0) $n=2; # 1110bbbb
    elseif ((ord($Str[$i]) & 0xF8) == 0xF0) $n=3; # 11110bbb
    elseif ((ord($Str[$i]) & 0xFC) == 0xF8) $n=4; # 111110bb
    elseif ((ord($Str[$i]) & 0xFE) == 0xFC) $n=5; # 1111110b
    else return false; # Does not match any model
    for ($j=0; $j<$n; $j++) { # n bytes matching 10bbbbbb follow ?
      if ((++$i == strlen($Str)) || ((ord($Str[$i]) & 0xC0) != 0x80))
      return false;
    }
  }
  return true;
}

/* Remove accents from a UTF-8 or ISO-859-1 string (from wordpress)
 * @param string sstring - an UTF-8 or ISO-8859-1 string
 */
function remove_accents($string)
{
  if ( !preg_match('/[\x80-\xff]/', $string) )
    return $string;

  if (seems_utf8($string)) {
    $chars = array(
    // Decompositions for Latin-1 Supplement
    chr(195).chr(128) => 'A', chr(195).chr(129) => 'A',
    chr(195).chr(130) => 'A', chr(195).chr(131) => 'A',
    chr(195).chr(132) => 'A', chr(195).chr(133) => 'A',
    chr(195).chr(135) => 'C', chr(195).chr(136) => 'E',
    chr(195).chr(137) => 'E', chr(195).chr(138) => 'E',
    chr(195).chr(139) => 'E', chr(195).chr(140) => 'I',
    chr(195).chr(141) => 'I', chr(195).chr(142) => 'I',
    chr(195).chr(143) => 'I', chr(195).chr(145) => 'N',
    chr(195).chr(146) => 'O', chr(195).chr(147) => 'O',
    chr(195).chr(148) => 'O', chr(195).chr(149) => 'O',
    chr(195).chr(150) => 'O', chr(195).chr(153) => 'U',
    chr(195).chr(154) => 'U', chr(195).chr(155) => 'U',
    chr(195).chr(156) => 'U', chr(195).chr(157) => 'Y',
    chr(195).chr(159) => 's', chr(195).chr(160) => 'a',
    chr(195).chr(161) => 'a', chr(195).chr(162) => 'a',
    chr(195).chr(163) => 'a', chr(195).chr(164) => 'a',
    chr(195).chr(165) => 'a', chr(195).chr(167) => 'c',
    chr(195).chr(168) => 'e', chr(195).chr(169) => 'e',
    chr(195).chr(170) => 'e', chr(195).chr(171) => 'e',
    chr(195).chr(172) => 'i', chr(195).chr(173) => 'i',
    chr(195).chr(174) => 'i', chr(195).chr(175) => 'i',
    chr(195).chr(177) => 'n', chr(195).chr(178) => 'o',
    chr(195).chr(179) => 'o', chr(195).chr(180) => 'o',
    chr(195).chr(181) => 'o', chr(195).chr(182) => 'o',
    chr(195).chr(182) => 'o', chr(195).chr(185) => 'u',
    chr(195).chr(186) => 'u', chr(195).chr(187) => 'u',
    chr(195).chr(188) => 'u', chr(195).chr(189) => 'y',
    chr(195).chr(191) => 'y',
    // Decompositions for Latin Extended-A
    chr(196).chr(128) => 'A', chr(196).chr(129) => 'a',
    chr(196).chr(130) => 'A', chr(196).chr(131) => 'a',
    chr(196).chr(132) => 'A', chr(196).chr(133) => 'a',
    chr(196).chr(134) => 'C', chr(196).chr(135) => 'c',
    chr(196).chr(136) => 'C', chr(196).chr(137) => 'c',
    chr(196).chr(138) => 'C', chr(196).chr(139) => 'c',
    chr(196).chr(140) => 'C', chr(196).chr(141) => 'c',
    chr(196).chr(142) => 'D', chr(196).chr(143) => 'd',
    chr(196).chr(144) => 'D', chr(196).chr(145) => 'd',
    chr(196).chr(146) => 'E', chr(196).chr(147) => 'e',
    chr(196).chr(148) => 'E', chr(196).chr(149) => 'e',
    chr(196).chr(150) => 'E', chr(196).chr(151) => 'e',
    chr(196).chr(152) => 'E', chr(196).chr(153) => 'e',
    chr(196).chr(154) => 'E', chr(196).chr(155) => 'e',
    chr(196).chr(156) => 'G', chr(196).chr(157) => 'g',
    chr(196).chr(158) => 'G', chr(196).chr(159) => 'g',
    chr(196).chr(160) => 'G', chr(196).chr(161) => 'g',
    chr(196).chr(162) => 'G', chr(196).chr(163) => 'g',
    chr(196).chr(164) => 'H', chr(196).chr(165) => 'h',
    chr(196).chr(166) => 'H', chr(196).chr(167) => 'h',
    chr(196).chr(168) => 'I', chr(196).chr(169) => 'i',
    chr(196).chr(170) => 'I', chr(196).chr(171) => 'i',
    chr(196).chr(172) => 'I', chr(196).chr(173) => 'i',
    chr(196).chr(174) => 'I', chr(196).chr(175) => 'i',
    chr(196).chr(176) => 'I', chr(196).chr(177) => 'i',
    chr(196).chr(178) => 'IJ',chr(196).chr(179) => 'ij',
    chr(196).chr(180) => 'J', chr(196).chr(181) => 'j',
    chr(196).chr(182) => 'K', chr(196).chr(183) => 'k',
    chr(196).chr(184) => 'k', chr(196).chr(185) => 'L',
    chr(196).chr(186) => 'l', chr(196).chr(187) => 'L',
    chr(196).chr(188) => 'l', chr(196).chr(189) => 'L',
    chr(196).chr(190) => 'l', chr(196).chr(191) => 'L',
    chr(197).chr(128) => 'l', chr(197).chr(129) => 'L',
    chr(197).chr(130) => 'l', chr(197).chr(131) => 'N',
    chr(197).chr(132) => 'n', chr(197).chr(133) => 'N',
    chr(197).chr(134) => 'n', chr(197).chr(135) => 'N',
    chr(197).chr(136) => 'n', chr(197).chr(137) => 'N',
    chr(197).chr(138) => 'n', chr(197).chr(139) => 'N',
    chr(197).chr(140) => 'O', chr(197).chr(141) => 'o',
    chr(197).chr(142) => 'O', chr(197).chr(143) => 'o',
    chr(197).chr(144) => 'O', chr(197).chr(145) => 'o',
    chr(197).chr(146) => 'OE',chr(197).chr(147) => 'oe',
    chr(197).chr(148) => 'R',chr(197).chr(149) => 'r',
    chr(197).chr(150) => 'R',chr(197).chr(151) => 'r',
    chr(197).chr(152) => 'R',chr(197).chr(153) => 'r',
    chr(197).chr(154) => 'S',chr(197).chr(155) => 's',
    chr(197).chr(156) => 'S',chr(197).chr(157) => 's',
    chr(197).chr(158) => 'S',chr(197).chr(159) => 's',
    chr(197).chr(160) => 'S', chr(197).chr(161) => 's',
    chr(197).chr(162) => 'T', chr(197).chr(163) => 't',
    chr(197).chr(164) => 'T', chr(197).chr(165) => 't',
    chr(197).chr(166) => 'T', chr(197).chr(167) => 't',
    chr(197).chr(168) => 'U', chr(197).chr(169) => 'u',
    chr(197).chr(170) => 'U', chr(197).chr(171) => 'u',
    chr(197).chr(172) => 'U', chr(197).chr(173) => 'u',
    chr(197).chr(174) => 'U', chr(197).chr(175) => 'u',
    chr(197).chr(176) => 'U', chr(197).chr(177) => 'u',
    chr(197).chr(178) => 'U', chr(197).chr(179) => 'u',
    chr(197).chr(180) => 'W', chr(197).chr(181) => 'w',
    chr(197).chr(182) => 'Y', chr(197).chr(183) => 'y',
    chr(197).chr(184) => 'Y', chr(197).chr(185) => 'Z',
    chr(197).chr(186) => 'z', chr(197).chr(187) => 'Z',
    chr(197).chr(188) => 'z', chr(197).chr(189) => 'Z',
    chr(197).chr(190) => 'z', chr(197).chr(191) => 's',
    // Euro Sign
    chr(226).chr(130).chr(172) => 'E',
    // GBP (Pound) Sign
    chr(194).chr(163) => '');

    $string = strtr($string, $chars);
  } else {
    // Assume ISO-8859-1 if not UTF-8
    $chars['in'] = chr(128).chr(131).chr(138).chr(142).chr(154).chr(158)
      .chr(159).chr(162).chr(165).chr(181).chr(192).chr(193).chr(194)
      .chr(195).chr(196).chr(197).chr(199).chr(200).chr(201).chr(202)
      .chr(203).chr(204).chr(205).chr(206).chr(207).chr(209).chr(210)
      .chr(211).chr(212).chr(213).chr(214).chr(216).chr(217).chr(218)
      .chr(219).chr(220).chr(221).chr(224).chr(225).chr(226).chr(227)
      .chr(228).chr(229).chr(231).chr(232).chr(233).chr(234).chr(235)
      .chr(236).chr(237).chr(238).chr(239).chr(241).chr(242).chr(243)
      .chr(244).chr(245).chr(246).chr(248).chr(249).chr(250).chr(251)
      .chr(252).chr(253).chr(255);

    $chars['out'] = "EfSZszYcYuAAAAAACEEEEIIIINOOOOOOUUUUYaaaaaaceeeeiiiinoooooouuuuyy";

    $string = strtr($string, $chars['in'], $chars['out']);
    $double_chars['in'] = array(chr(140), chr(156), chr(198), chr(208), chr(222), chr(223), chr(230), chr(240), chr(254));
    $double_chars['out'] = array('OE', 'oe', 'AE', 'DH', 'TH', 'ss', 'ae', 'dh', 'th');
    $string = str_replace($double_chars['in'], $double_chars['out'], $string);
  }

  return $string;
}

/**
 * simplify a string to insert it into an URL
 *
 * @param string
 * @return string
 */
function str2url($str)
{
  $str = remove_accents($str);
  $str = preg_replace('/[^a-z0-9_\s\'\:\/\[\],-]/','',strtolower($str));
  $str = preg_replace('/[\s\'\:\/\[\],-]+/',' ',trim($str));
  $res = str_replace(' ','_',$str);

  return $res;
}

//-------------------------------------------- Piwigo specific functions

/**
 * returns an array with a list of {language_code => language_name}
 *
 * @returns array
 */
function get_languages($target_charset = null)
{
  if ( empty($target_charset) )
  {
    $target_charset = get_pwg_charset();
  }
  $target_charset = strtolower($target_charset);

  $dir = opendir(PHPWG_ROOT_PATH.'language');
  $languages = array();

  while ($file = readdir($dir))
  {
    $path = PHPWG_ROOT_PATH.'language/'.$file;
    if (is_dir($path) and !is_link($path) and file_exists($path.'/iso.txt'))
    {
      list($language_name) = @file($path.'/iso.txt');

      $langdef = explode('.',$file);
      if (count($langdef)>1) // (langCode,encoding)
      {
        $langdef[1] = strtolower($langdef[1]);

        if (
          $target_charset==$langdef[1]
         or
          ($target_charset=='utf-8' and $langdef[1]=='iso-8859-1')
         or
          ($target_charset=='iso-8859-1' and
          in_array( substr($langdef[0],2), array('en','fr','de','es','it','nl')))
        )
        {
          $language_name = convert_charset($language_name,
              $langdef[1], $target_charset);
          $languages[ $langdef[0] ] = $language_name;
        }
        else
          continue; // the language encoding is not compatible with our charset
      }
      else
      { // UTF-8
        $language_name = convert_charset($language_name,
              'utf-8', $target_charset);
        $languages[$file] = $language_name;
      }
    }
  }
  closedir($dir);
  @asort($languages);
  @reset($languages);

  return $languages;
}

function pwg_log($image_id = null, $image_type = null)
{
  global $conf, $user, $page;

  $do_log = true;
  if (!$conf['log'])
  {
    $do_log = false;
  }
  if (is_admin() and !$conf['history_admin'])
  {
    $do_log = false;
  }
  if (is_a_guest() and !$conf['history_guest'])
  {
    $do_log = false;
  }

  $do_log = trigger_event('pwg_log_allowed', $do_log, $image_id, $image_type);

  if (!$do_log)
  {
    return false;
  }

  $tags_string = null;
  if (isset($page['section']) and $page['section'] == 'tags')
  {
    $tag_ids = array();
    foreach ($page['tags'] as $tag)
    {
      array_push($tag_ids, $tag['id']);
    }

    $tags_string = implode(',', $tag_ids);
  }

  $query = '
INSERT INTO '.HISTORY_TABLE.'
  (
    date,
    time,
    user_id,
    IP,
    section,
    category_id,
    image_id,
    image_type,
    tag_ids
  )
  VALUES
  (
    CURDATE(),
    CURTIME(),
    '.$user['id'].',
    \''.$_SERVER['REMOTE_ADDR'].'\',
    '.(isset($page['section']) ? "'".$page['section']."'" : 'NULL').',
    '.(isset($page['category']['id']) ? $page['category']['id'] : 'NULL').',
    '.(isset($image_id) ? $image_id : 'NULL').',
    '.(isset($image_type) ? "'".$image_type."'" : 'NULL').',
    '.(isset($tags_string) ? "'".$tags_string."'" : 'NULL').'
  )
;';
  pwg_query($query);

  return true;
}

// format_date returns a formatted date for display. The date given in
// argument can be a unixdate (number of seconds since the 01.01.1970) or an
// american format (2003-09-15). By option, you can show the time. The
// output is internationalized.
//
// format_date( "2003-09-15", 'us', true ) -> "Monday 15 September 2003 21:52"
function format_date($date, $type = 'us', $show_time = false)
{
  global $lang;

  list($year,$month,$day,$hour,$minute,$second) = array(0,0,0,0,0,0);

  switch ( $type )
  {
    case 'us' :
    {
      list($year,$month,$day) = explode('-', $date);
      break;
    }
    case 'unix' :
    {
      list($year,$month,$day,$hour,$minute) =
        explode('.', date('Y.n.j.G.i', $date));
      break;
    }
    case 'mysql_datetime' :
    {
      preg_match('/^(\d{4})-(\d{2})-(\d{2}) (\d{2}):(\d{2}):(\d{2})$/',
                 $date, $out);
      list($year,$month,$day,$hour,$minute,$second) =
        array($out[1],$out[2],$out[3],$out[4],$out[5],$out[6]);
      break;
    }
  }
  $formated_date = '';
  // before 1970, Microsoft Windows can't mktime
  if ($year >= 1970)
  {
    // we ask midday because Windows think it's prior to midnight with a
    // zero and refuse to work
    $formated_date.= $lang['day'][date('w', mktime(12,0,0,$month,$day,$year))];
  }
  $formated_date.= ' '.$day;
  $formated_date.= ' '.$lang['month'][(int)$month];
  $formated_date.= ' '.$year;
  if ($show_time)
  {
    $formated_date.= ' '.$hour.':'.$minute;
  }

  return $formated_date;
}

function pwg_query($query)
{
  global $conf,$page,$debug,$t2;

  $start = get_moment();
  $result = mysql_query($query) or my_error($query."\n");

  $time = get_moment() - $start;

  if (!isset($page['count_queries']))
  {
    $page['count_queries'] = 0;
    $page['queries_time'] = 0;
  }

  $page['count_queries']++;
  $page['queries_time']+= $time;

  if ($conf['show_queries'])
  {
    $output = '';
    $output.= '<pre>['.$page['count_queries'].'] ';
    $output.= "\n".$query;
    $output.= "\n".'(this query time : ';
    $output.= '<b>'.number_format($time, 3, '.', ' ').' s)</b>';
    $output.= "\n".'(total SQL time  : ';
    $output.= number_format($page['queries_time'], 3, '.', ' ').' s)';
    $output.= "\n".'(total time      : ';
    $output.= number_format( ($time+$start-$t2), 3, '.', ' ').' s)';
    if ( $result!=null and preg_match('/\s*SELECT\s+/i',$query) )
    {
      $output.= "\n".'(num rows        : ';
      $output.= mysql_num_rows($result).' )';
    }
    elseif ( $result!=null
      and preg_match('/\s*INSERT|UPDATE|REPLACE|DELETE\s+/i',$query) )
    {
      $output.= "\n".'(affected rows   : ';
      $output.= mysql_affected_rows().' )';
    }
    $output.= "</pre>\n";

    $debug .= $output;
  }

  return $result;
}

function pwg_debug( $string )
{
  global $debug,$t2,$page;

  $now = explode( ' ', microtime() );
  $now2 = explode( '.', $now[0] );
  $now2 = $now[1].'.'.$now2[1];
  $time = number_format( $now2 - $t2, 3, '.', ' ').' s';
  $debug .= '<p>';
  $debug.= '['.$time.', ';
  $debug.= $page['count_queries'].' queries] : '.$string;
  $debug.= "</p>\n";
}

/**
 * Redirects to the given URL (HTTP method)
 *
 * Note : once this function called, the execution doesn't go further
 * (presence of an exit() instruction.
 *
 * @param string $url
 * @return void
 */
function redirect_http( $url )
{
  if (ob_get_length () !== FALSE)
  {
    ob_clean();
  }
  // default url is on html format
  $url = html_entity_decode($url);
  header('Request-URI: '.$url);
  header('Content-Location: '.$url);
  header('Location: '.$url);
  exit();
}

/**
 * Redirects to the given URL (HTML method)
 *
 * Note : once this function called, the execution doesn't go further
 * (presence of an exit() instruction.
 *
 * @param string $url
 * @param string $title_msg
 * @param integer $refreh_time
 * @return void
 */
function redirect_html( $url , $msg = '', $refresh_time = 0)
{
  global $user, $template, $lang_info, $conf, $lang, $t2, $page, $debug;

  if (!isset($lang_info))
  {
    $user = build_user( $conf['guest_id'], true);
    load_language('common.lang');
    trigger_action('loading_lang');
    load_language('local.lang');
    list($tmpl, $thm) = explode('/', get_default_template());
    $template = new Template(PHPWG_ROOT_PATH.'template/'.$tmpl, $thm);
  }
  else
  {
    $template = new Template(PHPWG_ROOT_PATH.'template/'.$user['template'], $user['theme']);
  }

  if (empty($msg))
  {
    $redirect_msg = l10n('redirect_msg');
  }
  else
  {
    $redirect_msg = $msg;
  }
  $redirect_msg = nl2br($redirect_msg);

  $refresh = $refresh_time;
  $url_link = $url;
  $title = 'redirection';

  $template->set_filenames( array( 'redirect' => 'redirect.tpl' ) );

  include( PHPWG_ROOT_PATH.'include/page_header.php' );

  $template->set_filenames( array( 'redirect' => 'redirect.tpl' ) );
  $template->parse('redirect');

  include( PHPWG_ROOT_PATH.'include/page_tail.php' );

  exit();
}

/**
 * Redirects to the given URL (Switch to HTTP method or HTML method)
 *
 * Note : once this function called, the execution doesn't go further
 * (presence of an exit() instruction.
 *
 * @param string $url
 * @param string $title_msg
 * @param integer $refreh_time
 * @return void
 */
function redirect( $url , $msg = '', $refresh_time = 0)
{
  global $conf;

  // with RefeshTime <> 0, only html must be used
  if ($conf['default_redirect_method']=='http'
      and $refresh_time==0
      and !headers_sent()
    )
  {
    redirect_http($url);
  }
  else
  {
    redirect_html($url, $msg, $refresh_time);
  }
}

/**
 * returns $_SERVER['QUERY_STRING'] whitout keys given in parameters
 *
 * @param array $rejects
 * @param boolean $escape - if true escape & to &amp; (for html)
 * @returns string
 */
function get_query_string_diff($rejects=array(), $escape=true)
{
  $query_string = '';

  $str = $_SERVER['QUERY_STRING'];
  parse_str($str, $vars);

  $is_first = true;
  foreach ($vars as $key => $value)
  {
    if (!in_array($key, $rejects))
    {
      $query_string.= $is_first ? '?' : ($escape ? '&amp;' : '&' );
      $is_first = false;
      $query_string.= $key.'='.$value;
    }
  }

  return $query_string;
}

function url_is_remote($url)
{
  if ( strncmp($url, 'http://', 7)==0
    or strncmp($url, 'https://', 8)==0 )
  {
    return true;
  }
  return false;
}

/**
 * returns available template/theme
 */
function get_pwg_themes()
{
  global $conf;
  $themes = array();

  $template_dir = PHPWG_ROOT_PATH.'template';

  foreach (get_dirs($template_dir) as $template)
  {
    foreach (get_dirs($template_dir.'/'.$template.'/theme') as $theme)
    {
      if ( ($template.'/'.$theme) != $conf['admin_layout'] )
      array_push($themes, $template.'/'.$theme);
    }
  }

  return $themes;
}

/* Returns the PATH to the thumbnail to be displayed. If the element does not
 * have a thumbnail, the default mime image path is returned. The PATH can be
 * used in the php script, but not sent to the browser.
 * @param array element_info assoc array containing element info from db
 * at least 'path', 'tn_ext' and 'id' should be present
 */
function get_thumbnail_path($element_info)
{
  $path = get_thumbnail_location($element_info);
  if ( !url_is_remote($path) )
  {
    $path = PHPWG_ROOT_PATH.$path;
  }
  return $path;
}

/* Returns the URL of the thumbnail to be displayed. If the element does not
 * have a thumbnail, the default mime image url is returned. The URL can be
 * sent to the browser, but not used in the php script.
 * @param array element_info assoc array containing element info from db
 * at least 'path', 'tn_ext' and 'id' should be present
 */
function get_thumbnail_url($element_info)
{
  $path = get_thumbnail_location($element_info);
  if ( !url_is_remote($path) )
  {
    $path = embellish_url(get_root_url().$path);
  }

  // plugins want another url ?
  $path = trigger_event('get_thumbnail_url', $path, $element_info);
  return $path;
}

/* returns the relative path of the thumnail with regards to to the root
of piwigo (not the current page!).This function is not intended to be
called directly from code.*/
function get_thumbnail_location($element_info)
{
  global $conf;
  if ( !empty( $element_info['tn_ext'] ) )
  {
    $path = substr_replace(
      get_filename_wo_extension($element_info['path']),
      '/thumbnail/'.$conf['prefix_thumbnail'],
      strrpos($element_info['path'],'/'),
      1
      );
    $path.= '.'.$element_info['tn_ext'];
  }
  else
  {
    $path = get_themeconf('mime_icon_dir')
        .strtolower(get_extension($element_info['path'])).'.png';
  }

  // plugins want another location ?
  $path = trigger_event( 'get_thumbnail_location', $path, $element_info);
  return $path;
}

/* returns the title of the thumnail */
function get_thumbnail_title($element_info)
{
  // message in title for the thumbnail
  if (isset($element_info['file']))
  {
    $thumbnail_title = $element_info['file'];
  }
  else
  {
    $thumbnail_title = '';
  }

  if (!empty($element_info['filesize']))
  {
    $thumbnail_title .= ' : '.l10n_dec('%d Kb', '%d Kb', $element_info['filesize']);
  }

  return $thumbnail_title;
}

// my_error returns (or send to standard output) the message concerning the
// error occured for the last mysql query.
function my_error($header)
{
  global $conf;

  $error = '<pre>';
  $error.= $header;
  $error.= '[mysql error '.mysql_errno().'] ';
  $error.= mysql_error();
  $error.= '</pre>';

  if ($conf['die_on_sql_error'])
  {
    die($error);
  }
  else
  {
    echo $error;
  }
}

/**
 * creates an array based on a query, this function is a very common pattern
 * used here
 *
 * @param string $query
 * @param string $fieldname
 * @return array
 */
function array_from_query($query, $fieldname)
{
  $array = array();

  $result = pwg_query($query);
  while ($row = mysql_fetch_array($result))
  {
    array_push($array, $row[$fieldname]);
  }

  return $array;
}

/**
 * fill the current user caddie with given elements, if not already in
 * caddie
 *
 * @param array elements_id
 */
function fill_caddie($elements_id)
{
  global $user;

  include_once(PHPWG_ROOT_PATH.'admin/include/functions.php');

  $query = '
SELECT element_id
  FROM '.CADDIE_TABLE.'
  WHERE user_id = '.$user['id'].'
;';
  $in_caddie = array_from_query($query, 'element_id');

  $caddiables = array_diff($elements_id, $in_caddie);

  $datas = array();

  foreach ($caddiables as $caddiable)
  {
    array_push($datas, array('element_id' => $caddiable,
                             'user_id' => $user['id']));
  }

  if (count($caddiables) > 0)
  {
    mass_inserts(CADDIE_TABLE, array('element_id','user_id'), $datas);
  }
}

/**
 * returns the element name from its filename
 *
 * @param string filename
 * @return string name
 */
function get_name_from_file($filename)
{
  return str_replace('_',' ',get_filename_wo_extension($filename));
}

/**
 * returns the corresponding value from $lang if existing. Else, the key is
 * returned
 *
 * @param string key
 * @return string
 */
function l10n($key)
{
  global $lang, $conf;

  if ($conf['debug_l10n'] and !isset($lang[$key]) and !empty($key))
  {
    trigger_error('[l10n] language key "'.$key.'" is not defined', E_USER_NOTICE);
  }

  return isset($lang[$key]) ? $lang[$key] : $key;
}

/**
 * returns the prinft value for strings including %d
 * return is concorded with decimal value (singular, plural)
 *
 * @param singular string key
 * @param plural string key
 * @param decimal value
 * @return string
 */
function l10n_dec($singular_fmt_key, $plural_fmt_key, $decimal)
{
  global $lang_info;

  return
    sprintf(
      l10n((
        (($decimal > 1) or ($decimal == 0 and $lang_info['zero_plural']))
          ? $plural_fmt_key
          : $singular_fmt_key
        )), $decimal);
}
/*
 * returns a single element to use with l10n_args
 *
 * @param string key: translation key
 * @param array/string/../number args:
 *   arguments to use on sprintf($key, args)
 *   if args is a array, each values are used on sprintf
 * @return string
 */
function get_l10n_args($key, $args)
{
  if (is_array($args))
  {
    $key_arg = array_merge(array($key), $args);
  }
  else
  {
    $key_arg = array($key,  $args);
  }
  return array('key_args' => $key_arg);
}

/*
 * returns a string with formated with l10n_args elements
 *
 * @param element/array $key_args: element or array of l10n_args elements
 * @param $sep: if $key_args is array,
 *   separator is used when translated l10n_args elements are concated
 * @return string
 */
function l10n_args($key_args, $sep = "\n")
{
  if (is_array($key_args))
  {
    foreach ($key_args as $key => $element)
    {
      if (isset($result))
      {
        $result .= $sep;
      }
      else
      {
        $result = '';
      }

      if ($key === 'key_args')
      {
        array_unshift($element, l10n(array_shift($element)));
        $result .= call_user_func_array('sprintf', $element);
      }
      else
      {
        $result .= l10n_args($element, $sep);
      }
    }
  }
  else
  {
    die('l10n_args: Invalid arguments');
  }

  return $result;
}

/**
 * returns the corresponding value from $themeconf if existing. Else, the
 * key is returned
 *
 * @param string key
 * @return string
 */
function get_themeconf($key)
{
  global $template;

  return $template->get_themeconf($key);
}

/**
 * Returns webmaster mail address depending on $conf['webmaster_id']
 *
 * @return string
 */
function get_webmaster_mail_address()
{
  global $conf;

  $query = '
SELECT '.$conf['user_fields']['email'].'
  FROM '.USERS_TABLE.'
  WHERE '.$conf['user_fields']['id'].' = '.$conf['webmaster_id'].'
;';
  list($email) = mysql_fetch_array(pwg_query($query));

  return $email;
}

/**
 * which upgrades are available ?
 *
 * @return array
 */
function get_available_upgrade_ids()
{
  $upgrades_path = PHPWG_ROOT_PATH.'install/db';

  $available_upgrade_ids = array();

  if ($contents = opendir($upgrades_path))
  {
    while (($node = readdir($contents)) !== false)
    {
      if (is_file($upgrades_path.'/'.$node)
          and preg_match('/^(.*?)-database\.php$/', $node, $match))
      {
        array_push($available_upgrade_ids, $match[1]);
      }
    }
  }
  natcasesort($available_upgrade_ids);

  return $available_upgrade_ids;
}

/**
 * Add configuration parameters from database to global $conf array
 *
 * @return void
 */
function load_conf_from_db($condition = '')
{
  global $conf;

  $query = '
SELECT param, value
 FROM '.CONFIG_TABLE.'
 '.(!empty($condition) ? 'WHERE '.$condition : '').'
;';
  $result = pwg_query($query);

  if ((mysql_num_rows($result) == 0) and !empty($condition))
  {
    die('No configuration data');
  }

  while ($row = mysql_fetch_array($result))
  {
    $conf[ $row['param'] ] = isset($row['value']) ? $row['value'] : '';

    // If the field is true or false, the variable is transformed into a
    // boolean value.
    if ($conf[$row['param']] == 'true' or $conf[$row['param']] == 'false')
    {
      $conf[ $row['param'] ] = get_boolean($conf[ $row['param'] ]);
    }
  }
}

/**
 * Prepends and appends a string at each value of the given array.
 *
 * @param array
 * @param string prefix to each array values
 * @param string suffix to each array values
 */
function prepend_append_array_items($array, $prepend_str, $append_str)
{
  array_walk(
    $array,
    create_function('&$s', '$s = "'.$prepend_str.'".$s."'.$append_str.'";')
    );

  return $array;
}

/**
 * creates an hashed based on a query, this function is a very common
 * pattern used here. Among the selected columns fetched, choose one to be
 * the key, another one to be the value.
 *
 * @param string $query
 * @param string $keyname
 * @param string $valuename
 * @return array
 */
function simple_hash_from_query($query, $keyname, $valuename)
{
  $array = array();

  $result = pwg_query($query);
  while ($row = mysql_fetch_array($result))
  {
    $array[ $row[$keyname] ] = $row[$valuename];
  }

  return $array;
}

/**
 * creates an hashed based on a query, this function is a very common
 * pattern used here. The key is given as parameter, the value is an associative
 * array.
 *
 * @param string $query
 * @param string $keyname
 * @return array
 */
function hash_from_query($query, $keyname)
{
  $array = array();
  $result = pwg_query($query);
  while ($row = mysql_fetch_assoc($result))
  {
    $array[ $row[$keyname] ] = $row;
  }
  return $array;
}

/**
 * Return basename of the current script
 * Lower case convertion is applied on return value
 * Return value is without file extention ".php"
 *
 * @param void
 *
 * @return script basename
 */
function script_basename()
{
  global $conf;

  foreach (array('SCRIPT_NAME', 'SCRIPT_FILENAME', 'PHP_SELF') as $value)
  {
    $continue = !empty($_SERVER[$value]);
    if ($continue)
    {
      $filename = strtolower($_SERVER[$value]);

      if ($conf['php_extension_in_urls'])
      {
        $continue = get_extension($filename) ===  'php';
      }

      if ($continue)
      {
        $basename = basename($filename, '.php');
        $continue = !empty($basename);
      }

      if ($continue)
      {
        return $basename;
      }
    }
  }

  return '';
}

/**
 * Return value for the current page define on $conf['filter_pages']
 * �f value is not defined, default value are returned
 *
 * @param value name
 *
 * @return filter page value
 */
function get_filter_page_value($value_name)
{
  global $conf;

  $page_name = script_basename();

  if (isset($conf['filter_pages'][$page_name][$value_name]))
  {
    return $conf['filter_pages'][$page_name][$value_name];
  }
  else if (isset($conf['filter_pages']['default'][$value_name]))
  {
    return $conf['filter_pages']['default'][$value_name];
  }
  else
  {
    return null;
  }
}

/**
 * returns the character set of data sent to browsers / received from forms
 */
function get_pwg_charset()
{
  defined('PWG_CHARSET') or die('load_language PWG_CHARSET undefined');
  return PWG_CHARSET;
}

/**
 * includes a language file or returns the content of a language file
 * availability of the file
 *
 * in descending order of preference:
 *   param language, user language, default language
 * Piwigo default language.
 *
 * @param string filename
 * @param string dirname
 * @param string language
 * @param bool return_content - if true the file content is returned otherwise
 *  the file is evaluated as php
 * @return boolean success status or a string if return_content is true
 */
function load_language($filename, $dirname = '', $language = '',
    $return_content=false, $target_charset=null)
{
  global $user;

  if (!$return_content)
  {
    $filename .= '.php'; //MAYBE to do .. load .po and .mo localization files
  }
  if (empty($dirname))
  {
    $dirname = PHPWG_ROOT_PATH;
  }
  $dirname .= 'language/';

  $languages = array();
  if ( !empty($language) )
  {
    $languages[] = $language;
  }
  if ( !empty($user['language']) )
  {
    $languages[] = $user['language'];
  }
  if ( defined('PHPWG_INSTALLED') )
  {
    $languages[] = get_default_language();
  }
  $languages[] = PHPWG_DEFAULT_LANGUAGE;
  $languages = array_unique($languages);

  if ( empty($target_charset) )
  {
    $target_charset = get_pwg_charset();
  }
  $target_charset = strtolower($target_charset);
  $source_charset = '';
  $source_file    = '';
  foreach ($languages as $language)
  {
    $dir = $dirname.$language;

    // exact charset match - no conversion required
    $f = $dir.'.'.$target_charset.'/'.$filename;
    if (file_exists($f))
    {
      $source_file = $f;
      break;
    }

    // UTF-8 ?
    $f = $dir.'/'.$filename;
    if (file_exists($f))
    {
      $source_charset = 'utf-8';
      $source_file = $f;
      break;
    }

    if ($target_charset=='utf-8')
    { // we accept conversion from ISO-8859-1 to UTF-8
      $f = $dir.'.iso-8859-1/'.$filename;
      if (file_exists($f))
      {
        $source_charset = 'iso-8859-1';
        $source_file = $f;
        break;
      }
    }
  }

  if ( !empty($source_file) )
  {
    if (!$return_content)
    {
      @include($source_file);
      $load_lang = @$lang;
      $load_lang_info = @$lang_info;

      global $lang, $lang_info;
      if ( !isset($lang) ) $lang=array();
      if ( !isset($lang_info) ) $lang_info=array();

      if ( !empty($source_charset) and $source_charset!=$target_charset)
      {
        if ( is_array($load_lang) )
        {
          foreach ($load_lang as $k => $v)
          {
            if ( is_array($v) )
            {
              $func = create_function('$v', 'return convert_charset($v, "'.$source_charset.'","'.$target_charset.'");' );
              $lang[$k] = array_map($func, $v);
            }
            else
              $lang[$k] = convert_charset($v, $source_charset, $target_charset);
          }
        }
        if ( is_array($load_lang_info) )
        {
          foreach ($load_lang_info as $k => $v)
          {
            $lang_info[$k] = convert_charset($v, $source_charset, $target_charset);
          }
        }
      }
      else
      {
        $lang = array_merge( $lang, (array)$load_lang );
        $lang_info = array_merge( $lang_info, (array)$load_lang_info );
      }
      return true;
    }
    else
    {
      $content = @file_get_contents($source_file);
      if ( !empty($source_charset) and $source_charset!=$target_charset)
      {
        $content = convert_charset($content, $source_charset, $target_charset);
      }
      return $content;
    }
  }
  return false;
}

/**
 * converts a string from a character set to another character set
 * @param string str the string to be converted
 * @param string source_charset the character set in which the string is encoded
 * @param string dest_charset the destination character set
 */
function convert_charset($str, $source_charset, $dest_charset)
{
  if ($source_charset==$dest_charset)
    return $str;
  if ($source_charset=='iso-8859-1' and $dest_charset=='utf-8')
  {
    return utf8_encode($str);
  }
  if ($source_charset=='utf-8' and $dest_charset=='iso-8859-1')
  {
    return utf8_decode($str);
  }
  if (function_exists('iconv'))
  {
    return iconv($source_charset, $dest_charset, $str);
  }
  if (function_exists('mb_convert_encoding'))
  {
    return mb_convert_encoding( $str, $dest_charset, $source_charset );
  }
  return $str; //???
}
?>