summaryrefslogtreecommitdiffstats
path: root/includes/common.inc
blob: 12a71bbda8ea173239f6ee178502886d3d2cf3ed (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
<?php
// $Id$

function conf_init() {

  /*
  ** Try finding a matching configuration file by stripping the website's
  ** URI from left to right.  If no configuration file is found, return a
  ** default value 'conf'.
  */

  $uri = $_SERVER["PHP_SELF"];

  $file = strtolower(strtr($_SERVER["HTTP_HOST"] . substr($uri, 0, strrpos($uri, "/")), "/:", ".."));

  while (strlen($file) > 4) {
    if (file_exists("includes/$file.php")) {
      return $file;
    }
    else {
      $file = substr($file, strpos($file, ".") + 1);
    }
  }

  return "conf";
}

function error_handler($errno, $message, $filename, $line, $variables) {
  $types = array(1 => "error", 2 => "warning", 4 => "parse error", 8 => "notice", 16 => "core error", 32 => "core warning", 64 => "compile error", 128 => "compile warning", 256 => "user error", 512 => "user warning", 1024 => "user notice");
  $entry = $types[$errno] .": $message in $filename on line $line.";

  if ($errno & E_ALL ^ E_NOTICE) {
    watchdog("error", $types[$errno] .": $message in $filename on line $line.");
    print "<pre>$entry</pre>";
  }
}

function watchdog($type, $message, $link = NULL) {
  global $user;
  db_query("INSERT INTO watchdog (uid, type, message, link, location, hostname, timestamp) VALUES (%d, '%s', '%s', '%s', '%s', '%s', %d)", $user->uid, $type, $message, $link, request_uri(), getenv("REMOTE_ADDR"), time());
}

function throttle($type, $rate) {
  if (!user_access("access administration pages")) {
    if ($throttle = db_fetch_object(db_query("SELECT * FROM watchdog WHERE type = '$type' AND hostname = '". getenv("REMOTE_ADDR") ."' AND ". time() ." - timestamp < $rate"))) {
      watchdog("warning", "throttle: '". getenv("REMOTE_ADDR") ."' exceeded submission rate - $throttle->type");
      die(message_throttle());
    }
    else {
      watchdog($type, "throttle");
    }
  }
}

function check_php_setting($name, $value) {
  if (ini_get($name) != $value) {
    print "<p>Note that the value of PHP's configuration option <code><b>$name</b></code> is incorrect.  It should be set to '$value' for Drupal to work properly.  Either configure your webserver to support <code>.htaccess</code> files so Drupal's <code>.htaccess</code> file can set it to the proper value, or edit your <code>php.ini</code> file directly.  This message will automatically dissapear when the problem has been fixed.</p>";
  }
}

function arg($index) {

  static $arguments;

  if (empty($arguments)) {
    $arguments = explode("/", $_GET["q"]);
  }

  return $arguments[$index];
}

function array2object($node) {

  if (is_array($node)) {
    foreach ($node as $key => $value) {
      $object->$key = $value;
    }
  }
  else {
    $object = $node;
  }

  return $object;
}

function object2array($node) {

  if (is_object($node)) {
    foreach ($node as $key => $value) {
      $array[$key] = $value;
    }
  }
  else {
    $array = $node;
  }

  return $array;
}

function referer_uri() {

  if (isset($_SERVER["HTTP_REFERER"])) {
    $uri = $_SERVER["HTTP_REFERER"];

    return check_url($uri);
  }
}

function request_uri() {
  /*
  ** Since request_uri() is only available on Apache, we generate
  ** equivalent using other environment vars.
  */

  if (isset($_SERVER["REQUEST_URI"])) {
    $uri = $_SERVER["REQUEST_URI"];
  }
  else {
    $uri = $_SERVER["PHP_SELF"] ."?". $_SERVER["QUERY_STRING"];
  }

  return check_url($uri);
}

function message_access() {
  return t("You are not authorized to access this page.");
}

function message_na() {
  return t("n/a");
}

function message_throttle() {
  return t("You exceeded the maximum submission rate.  Please wait a few minutes and try again.");
}

function locale_init() {
  global $languages, $user;
  if ($user->uid && $languages[$user->language]) {
    return $user->language;
  }
  else {
    return key($languages);
  }
}

function t($string, $args = 0) {
  global $languages;

  /*
  ** About the usage of t().  We try to keep strings whole as much as
  ** possible and are unafraid of HTML markup within translation strings
  ** if necessary.  The suggested syntax for a link embedded within a
  ** translation string is for example:
  **
  ** $msg = t("You must login below or <a href=\"%url\">create a new
  **           account</a> before viewing the next page.", array("%url"
  **           => url("user/register")));
  */

  $string = ($languages && module_exist("locale") ? locale($string) : $string);

  if (!$args) {
    return $string;
  }
  else {
    return strtr($string, $args);
  }
}

function variable_init($conf = array()) {
  $result = db_query("SELECT * FROM variable");
  while ($variable = db_fetch_object($result)) {
    if (!isset($conf[$variable->name])) {
      $conf[$variable->name] = unserialize($variable->value);
    }
  }

  return $conf;
}

function variable_get($name, $default, $object = 0) {
  global $conf;

  return isset($conf[$name]) ? $conf[$name] : $default;
}

function variable_set($name, $value) {
  global $conf;

  db_query("DELETE FROM variable WHERE name = '%s'", $name);
  db_query("INSERT INTO variable (name, value) VALUES ('%s', '%s')", $name, serialize($value));

  $conf[$name] = $value;
}

function variable_del($name) {
  global $conf;

  db_query("DELETE FROM variable WHERE name = '%s'", $name);

  unset($conf[$name]);
}

function drupal_specialchars($input, $quotes = ENT_NOQUOTES) {

  /*
  ** Note that we'd like to go 'htmlspecialchars($input, $quotes, "utf-8")'
  ** like the PHP manual tells us to, but we can't because there's a bug in
  ** PHP <4.3 that makes it mess up multibyte charsets if we specify the
  ** charset.  Change this later once we make PHP 4.3 a requirement.
  */

  return htmlspecialchars($input, $quotes);
}

function table_cell($cell, $header = 0) {
  if (is_array($cell)) {
    $data = $cell["data"];
    foreach ($cell as $key => $value) {
      if ($key != "data")  {
        $attributes .= " $key=\"$value\"";
      }
    }
  }
  else {
    $data = $cell;
  }

  if ($header) {
    $output = "<th$attributes>$data</th>";
  }
  else {
    $output = "<td$attributes>$data</td>";
  }

  return $output;
}

function table($header, $rows) {

  $output = "<table>\n";

  /*
  ** Emit the table header:
  */

  if (is_array($header)) {
    $output .= " <tr>";
    foreach ($header as $cell) {
      $output .= table_cell($cell, 1);
    }
    $output .= " </tr>\n";
  }

  /*
  ** Emit the table rows:
  */

  if (is_array($rows)) {
    foreach ($rows as $number => $row) {
      if ($number % 2 == 1) {
        $output .= " <tr class=\"light\">";
      }
      else {
        $output .= " <tr class=\"dark\">";
      }

      foreach ($row as $cell) {
        $output .= table_cell($cell, 0);
      }
      $output .= " </tr>\n";
    }
  }

  $output .= "</table>\n";

  return $output;
}

/**
 * Verify the syntax of the given e-mail address.  Empty e-mail addresses
 * are allowed.  See RFC 2822 for details.
 *
 * @param $mail  a email address
 */
function valid_email_address($mail) {
  $user = '[a-zA-Z0-9_\-\.\+\^!#\$%&*+\/\=\?\`\|\{\}~\']+';
  $domain = '(?:[a-zA-Z0-9]|[a-zA-Z0-9][a-zA-Z0-9\-]*[a-zA-Z0-9]\.?)+';
  $ipv4 = '[0-9]{1,3}(\.[0-9]{1,3}){3}';
  $ipv6 = '[0-9a-fA-F]{1,4}(\:[0-9a-fA-F]{1,4}){7}';

  if (preg_match("/^$user@($domain|(\[($ipv4|$ipv6)\]))$/", $mail)) {
    return 1;
  }
  else {
    return 0;
  }
}

/**
 * Format a single result entry of a search query:
 *
 * @param $item  a single search result as returned by <module>_search of type
 *               array("count" => ..., "link" => ..., "title" => ...,
 *               "user" => ..., "date" => ..., "keywords" => ...)
 * @param $type  module type of this item
 */
function search_item($item, $type) {

  /*
  ** Modules may implement the "search_item" hook in order to overwrite
  ** the default function to display search results.
  */

  if (module_hook($type, "search_item")) {
    $output = module_invoke($type, "search_item", $item);
  }
  else {
    $output .= " <b><u><a href=\"". $item["link"] ."\">". $item["title"] ."</a></u></b><br />";
    $output .= " <small>$type ". ($item["user"] ? " - ". $item["user"] : "") ."". ($item["date"] ? " - ". format_date($item["date"], "small") : "") ."</small>";
    $output .= "<br /><br />";
  }

  return $output;
}

/**
 * Render a generic search form.
 *
 * "Generic" means "universal usable" - that is, usable not only from
 * 'site.com/search', but also as a simple seach box (without
 * "Restrict search to", help text, etc) from theme's header etc.
 * This means: provide options to only conditionally render certain
 * parts of this form.
 *
 * @param $action  Form action. Defaults to 'site.com/search'.
 * @param $keys   string containing keywords for the search.
 * @param $options != 0: Render additional form fields/text
 *                 ("Restrict search to", help text, etc).
 */
function search_form($action = 0, $keys = 0, $options = 0) {

  if (!$action) {
    $action = url("search");
  }

  $output .= " <br /><input type=\"text\" size=\"50\" value=\"". check_form($keys) ."\" name=\"keys\" />";
  $output .= " <input type=\"submit\" value=\"". t("Search") ."\" />\n";

  if ($options != 0) {
    $output .= "<br />";
    $output .= t("Restrict search to") .": ";

    foreach (module_list() as $name) {
      if (module_hook($name, "search")) {
        $output .= " <input type=\"checkbox\" name=\"edit[type][$name]\" ". ($edit["type"][$name] ? " checked=\"checked\"" : "") ." /> ". t($name);
      }
    }
  }

  $form .= "<br />";

  return form($output, "post", $action);
}

/*
 * Collect the search results:
 */
function search_data($keys = NULL) {

  $edit = $_POST["edit"];

  if (isset($keys)) {
    foreach (module_list() as $name) {
      if (module_hook($name, "search") && (!$edit["type"] || $edit["type"][$name]) && ($result = module_invoke($name, "search", check_query($keys)))) {
        if ($name == "node" || $name == "comment") {
          $output .= "<p><b>". t("Matching ". $name ."s ranked in order of relevance") .":</b></p>";
        }
        else {
          $output .= "<p><b>". t("Matching ". $name ."s") .":</b></p>";
        }
        foreach ($result as $entry) {
          $output .= search_item($entry, $name);
        }
      }
    }
  }

  return $output;
}

/**
 * Display the search form and the resulting data.
 *
 * @param $type    If set, search only nodes of this type.
 *                 Otherwise, search all types.
 * @param $action  Form action. Defaults to 'site.com/search'.
 * @param $query   Query string. Defaults to global $keys.
 * @param $options != 0: Render additional form fields/text
 *                 ("Restrict search to", help text, etc).
 */
function search_type($type = 0, $action = 0, $keys = 0, $options = 0) {

  if (isset($type)) {
    $_POST["edit"]["type"][$type] = "on";
  }

  return search_form($action, $keys, $options) . "<br />". search_data($keys);
}


function drupal_goto($url) {

  /*
  ** Check the URL to prevent XSS attacks:
  */

  $url = check_url($url);

  /*
  ** Translate &amp; to simply &
  */

  $url = str_replace("&amp;", "&", $url);

  /*
  ** It is advised to use "drupal_goto()" instead of PHP's "header()" as
  ** "drupal_goto()" will append the user's session ID to the URI when PHP
  ** is compiled with "--enable-trans-sid".
  */
  if (!ini_get("session.use_trans_sid") || !session_id() || strstr($url, session_id())) {
    header("Location: $url");
  }
  else {
    $sid = session_name() . "=" . session_id();

    if (strstr($url, "?") && !strstr($url, $sid)) {
      header("Location: $url&". $sid);
    }
    else {
      header("Location: $url?". $sid);
    }
  }

  /*
  ** The "Location" header sends a REDIRECT status code to the http
  ** daemon.  In some cases this can go wrong, so we make sure none
  ** of the code /below/ gets executed when we redirect.
  */

  exit();
}

/*
** Stores the referer in a persistent variable:
*/

function referer_save() {
  if (!strstr(referer_uri(), request_uri())) {
    $_SESSION["referer"] = referer_uri();
  }
}

/*
** Restores the referer from a persistent variable:
*/

function referer_load() {
  if (isset($_SESSION["referer"])) {
    return $_SESSION["referer"];
  }
  else {
    return 0;
  }
}

function check_url($uri) {
  /*
  ** We pipe the request URI through htmlspecialchars() to prevent
  ** XSS attacks.
  */

  $uri = htmlspecialchars($uri, ENT_QUOTES);

  /*
  ** We replace ( and ) with their entity equivalents to prevent XSS
  ** attacks.
  */

  $uri = strtr($uri, array("(" => "&040;", ")" => "&041;"));

  return $uri;
}

function check_form($text) {
  return drupal_specialchars($text, ENT_QUOTES);
}

function check_query($text) {
  return addslashes($text);
}

function filter($text) {

  $modules = module_list();

  /*
  ** Make sure the HTML filters that are part of the node module
  ** are run first.
  */

  if (in_array("node", $modules)) {
    $text = module_invoke("node", "filter", $text);
  }

  foreach ($modules as $name) {
    if (module_hook($name, "filter") && $name != "node") {
      $text = module_invoke($name, "filter", $text);
    }
  }

  return $text;
}

function rewrite_old_urls($text) {

  global $base_url;

  $end = substr($base_url, 12);

  /*
  ** This is a *temporary* filter to rewrite old-style URLs to new-style
  ** URLs (clean URLs).  Currently, URLs are being rewritten dynamically
  ** (ie. "on output"), however when these rewrite rules have been tested
  ** enough, we will use them to permanently rewrite the links in node
  ** and comment bodies.
  */

  if (variable_get("clean_url", "0") == "0") {
    /*
    ** Relative URLs:
    */

    // rewrite 'node.php?id=<number>[&cid=<number>]' style URLs:
    $text = eregi_replace("\"(node)\.php\?id=([[:digit:]]+)(&cid=)?([[:digit:]]*)", "\"?q=\\1/view/\\2/\\4", $text);

    // rewrite 'module.php?mod=<name>{&<op>=<value>}' style URLs:
    $text = ereg_replace("\"module\.php\?(&?[[:alpha:]]+=([[:alnum:]]+))(&?[[:alpha:]]+=([[:alnum:]]+))(&?[[:alpha:]]+=([[:alnum:]]+))", "\"?q=\\2/\\4/\\6" , $text);
    $text = ereg_replace("\"module\.php\?(&?[[:alpha:]]+=([[:alnum:]]+))(&?[[:alpha:]]+=([[:alnum:]]+))", "\"?q=\\2/\\4", $text);
    $text = ereg_replace("\"module\.php\?(&?[[:alpha:]]+=([[:alnum:]]+))", "\"?q=\\2", $text);

    /*
    ** Absolute URLs:
    */

    // rewrite 'node.php?id=<number>[&cid=<number>]' style URLs:
    $text = eregi_replace("$end/(node)\.php\?id=([[:digit:]]+)(&cid=)?([[:digit:]]*)", "$end/?q=\\1/view/\\2/\\4", $text);

    // rewrite 'module.php?mod=<name>{&<op>=<value>}' style URLs:
    $text = ereg_replace("$end/module\.php\?(&?[[:alpha:]]+=([[:alnum:]]+))(&?[[:alpha:]]+=([[:alnum:]]+))(&?[[:alpha:]]+=([[:alnum:]]+))", "$end/?q=\\2/\\4/\\6" , $text);
    $text = ereg_replace("$end/module\.php\?(&?[[:alpha:]]+=([[:alnum:]]+))(&?[[:alpha:]]+=([[:alnum:]]+))", "$end/?q=\\2/\\4", $text);
    $text = ereg_replace("$end/module\.php\?(&?[[:alpha:]]+=([[:alnum:]]+))", "\"$end/?q=\\2", $text);
  }
  else {
    /*
    ** Relative URLs:
    */

    // rewrite 'node.php?id=<number>[&cid=<number>]' style URLs:
    $text = eregi_replace("\"(node)\.php\?id=([[:digit:]]+)(&cid=)?([[:digit:]]*)", "\"\\1/view/\\2/\\4", $text);

    // rewrite 'module.php?mod=<name>{&<op>=<value>}' style URLs:
    $text = ereg_replace("\"module\.php\?(&?[[:alpha:]]+=([[:alnum:]]+))(&?[[:alpha:]]+=([[:alnum:]]+))(&?[[:alpha:]]+=([[:alnum:]]+))", "\"\\2/\\4/\\6", $text);
    $text = ereg_replace("\"module\.php\?(&?[[:alpha:]]+=([[:alnum:]]+))(&?[[:alpha:]]+=([[:alnum:]]+))", "\"\\2/\\4", $text);
    $text = ereg_replace("\"module\.php\?(&?[[:alpha:]]+=([[:alnum:]]+))", "\"\\2", $text);

    /*
    ** Absolute URLs:
    */

    // rewrite 'node.php?id=<number>[&cid=<number>]' style URLs:
    $text = eregi_replace("$end/(node)\.php\?id=([[:digit:]]+)(&cid=)?([[:digit:]]*)", "$end/\\1/view/\\2/\\4", $text);

    // rewrite 'module.php?mod=<name>{&<op>=<value>}' style URLs:
    $text = ereg_replace("$end/module\.php\?(&?[[:alpha:]]+=([[:alnum:]]+))(&?[[:alpha:]]+=([[:alnum:]]+))(&?[[:alpha:]]+=([[:alnum:]]+))", "$end/\\2/\\4/\\6", $text);
    $text = ereg_replace("$end/module\.php\?(&?[[:alpha:]]+=([[:alnum:]]+))(&?[[:alpha:]]+=([[:alnum:]]+))", "$end/\\2/\\4", $text);
    $text = ereg_replace("$end/module\.php\?(&?[[:alpha:]]+=([[:alnum:]]+))", "$end/\\2", $text);
}

  return $text;
}

function check_output($text) {
  if (isset($text)) {
    // filter content on output:
    $text = filter($text);

    // get the line breaks right:
    if (strip_tags($text, "<a><i><b><u><tt><code><cite><strong><img>") == $text) {
      $text = nl2br($text);
    }
  }
  else {
    $text = message_na();
  }

  return $text;
}

function check_file($filename) {
  if (is_uploaded_file($filename)) {
    return 1;
  }
  else {
    return 0;
  }
}

function format_rss_channel($title, $link, $description, $items, $language = "en", $args = array()) {
  // arbitrary elements may be added using the $args associative array

  $output .= "<channel>\n";
  $output .= " <title>". drupal_specialchars(strip_tags($title)) ."</title>\n";
  $output .= " <link>". drupal_specialchars(strip_tags($link)) ."</link>\n";
  $output .= " <description>". drupal_specialchars($description) ."</description>\n";
  $output .= " <language>". drupal_specialchars(strip_tags($language)) ."</language>\n";
  foreach ($args as $key => $value) {
    $output .= "<$key>". drupal_specialchars(strip_tags($value)) ."</$key>";
  }
  $output .= $items;
  $output .= "</channel>\n";

  return $output;
}

function format_rss_item($title, $link, $description, $args = array()) {
  // arbitrary elements may be added using the $args associative array

  $output .= "<item>\n";
  $output .= " <title>". drupal_specialchars(strip_tags($title)) ."</title>\n";
  $output .= " <link>". drupal_specialchars(strip_tags($link)) ."</link>\n";
  $output .= " <description>". drupal_specialchars(check_output($description)) ."</description>\n";
  foreach ($args as $key => $value) {
    $output .= "<$key>". drupal_specialchars(strip_tags($value)) ."</$key>";
  }
  $output .= "</item>\n";

  return $output;
}

/**
 * Formats a string with a count of items so that the string is pluralized
 * correctly.
 * format_plural calls t() by itself, make sure not to pass already localized
 * strings to it.
 *
 * @param $count    The item count to display.
 * @param $singular The string for the singular case. Please make sure it's clear
 *                  this is singular, to ease translation. ("1 new comment" instead of
 *                  "1 new").
 * @param $plural   The string for the plrual case. Please make sure it's clear
 *                  this is plural, to ease translation. Use %count in places of the
 *                  item count, as in "%count new comments".
 */
function format_plural($count, $singular, $plural) {
  return t($count == 1 ? $singular : $plural, array("%count" => $count));
}

function format_size($size) {
  $suffix = t("bytes");
  if ($size > 1024) {
    $size = round($size / 1024, 2);
    $suffix = t("KB");
  }
  if ($size > 1024) {
    $size = round($size / 1024, 2);
    $suffix = t("MB");
  }
  return t("%size %suffix", array("%size" => $size, "%suffix" => $suffix));
}

function cache_get($key) {
  $cache = db_fetch_object(db_query("SELECT data, created FROM cache WHERE cid = '%s'", $key));
  return $cache->data ? $cache : 0;
}

function cache_set($cid, $data, $expire = 0) {
  if (db_fetch_object(db_query("SELECT cid FROM cache WHERE cid = '%s'", $cid))) {
    db_query("UPDATE cache SET data = '%s', created = %d, expire = %d WHERE cid = '%s'", $data, time(), $expire, $cid);
  }
  else {
    db_query("INSERT INTO cache (cid, data, created, expire) VALUES('%s', '%s', %d, %d)", $cid, $data, time(), $expire);
  }
}

function cache_clear_all($cid = NULL) {
  if (empty($cid)) {
    db_query("DELETE FROM cache WHERE expire <> 0");
  }
  else {
    db_query("DELETE FROM cache WHERE cid = %d", $cid);
  }
}

function page_set_cache() {
  global $user;

  if (!$user->uid && $_SERVER["REQUEST_METHOD"] == "GET") {
    if ($data = ob_get_contents()) {
      cache_set(request_uri(), $data, (time() + variable_get("cache_clear", 120)));
    }
  }
}

function page_get_cache() {
  global $user;

  $cache = NULL;

  if (!$user->uid && $_SERVER["REQUEST_METHOD"] == "GET") {
    $cache = cache_get(request_uri());

    if (empty($cache)) {
      ob_start();
    }
  }

  return $cache;
}

function format_interval($timestamp) {
  $units = array("1 year|%count years" => 31536000, "1 week|%count weeks" => 604800, "1 day|%count days" => 86400, "1 hour|%count hours" => 3600, "1 min|%count min" => 60, "1 sec|%count sec" => 1);
  foreach ($units as $key=>$value) {
    $key = explode("|", $key);
    if ($timestamp >= $value) {
      $output .= ($output ? " " : "") . format_plural(floor($timestamp / $value), $key[0], $key[1]);
      $timestamp %= $value;
    }
  }
  return ($output) ? $output : t("0 sec");
}

function format_date($timestamp, $type = "medium", $format = "") {
  global $user;

  $timestamp += ($user->timezone) ? $user->timezone - date("Z") : 0;

  switch ($type) {
    case "small":
      $date = date(variable_get("date_format_short", "m/d/Y - H:i"), $timestamp);
      break;
    case "medium":
      $date = date(variable_get("date_format_medium", "D, m/d/Y - H:i"), $timestamp);
      break;
    case "large":
      $date = date(variable_get("date_format_long", "l, F j, Y - H:i"), $timestamp);
      break;
    case "custom":
      for ($i = strlen($format); $i >= 0; $c = $format[--$i]) {
        if (strstr("DFlMSw", $c)) {
          $date = t(date($c, $timestamp)) . $date;
        }
        else if (strstr("AaBdgGhHiIjLmnOrstTUWYyZz", $c)) {
          $date = date($c, $timestamp) . $date;
        }
        else {
          $date = $c.$date;
        }
      }
      break;
    default:
      $date = date(variable_get("date_format_medium", "l, m/d/Y - H:i"), $timestamp);
  }
  return $date;
}

function format_name($object) {

  if ($object->uid && $object->name) {
    if (arg(0) == "admin") {
      $output = l($object->name, "admin/user/edit/$object->uid", array("title" => t("Administer user profile.")));
    }
    else {
      $output = l($object->name, "user/view/$object->uid", array("title" => t("View user profile.")));
    }
  }
  else if ($object->name) {
    /*
    ** Sometimes modules display content composed by people who are
    ** not registers members of the site (i.e. mailing list or news
    ** aggregator modules).  This clause enables modules to display
    ** the true author of the content.
    */

    $output = $object->name;
  }
  else {
    $output = t(variable_get("anonymous", "Anonymous"));
  }

  return $output;
}

function form($form, $method = "post", $action = 0, $options = 0) {

  if (!$action) {
    $action = request_uri();
  }
  return "<form action=\"$action\" method=\"$method\"". ($options ? " $options" : "") .">\n$form\n</form>\n";
}

function form_item($title, $value, $description = 0) {
  return "<div class=\"form-item\">". ($title ? "<div class=\"title\">$title:</div>" : "") . $value . ($description ? "<div class=\"description\">$description</div>" : "") ."</div>\n";
}

function form_radio($title, $name, $value = 1, $checked = 0, $description = 0) {
  return form_item(0, "<input type=\"radio\" class=\"form-radio\" name=\"edit[$name]\" value=\"". $value ."\"". ($checked ? " checked=\"checked\"" : "") ." /> $title", $description);
}

function form_checkbox($title, $name, $value = 1, $checked = 0, $description = 0) {
  return form_hidden($name, 0) . form_item(0, "<input type=\"checkbox\" class=\"form-checkbox\" name=\"edit[$name]\" value=\"". $value ."\"". ($checked ? " checked=\"checked\"" : "") ." /> $title", $description);
}

function form_textfield($title, $name, $value, $size, $maxlength, $description = 0) {
  $size = $size ? " size=\"$size\"" : "";
  return form_item($title, "<input type=\"text\" maxlength=\"$maxlength\" class=\"form-text\" name=\"edit[$name]\"$size value=\"". check_form($value) ."\" />", $description);
}

function form_password($title, $name, $value, $size, $maxlength, $description = 0) {
  $size = $size ? " size=\"$size\"" : "";
  return form_item($title, "<input type=\"password\" class=\"form-password\" maxlength=\"$maxlength\" name=\"edit[$name]\"$size value=\"". check_form($value) ."\" />", $description);
}

function form_textarea($title, $name, $value, $cols, $rows, $description = 0) {
  $cols = $cols ? " cols=\"$cols\"" : "";
  module_invoke_all("textarea", $name);  // eg. optionally plug in a WYSIWYG editor
  return form_item($title, "<textarea wrap=\"virtual\"$cols rows=\"$rows\" name=\"edit[$name]\" id=\"edit[$name]\">". check_form($value) ."</textarea>", $description);
}

function form_select($title, $name, $value, $options, $description = 0, $extra = 0, $multiple = 0) {
  if (count($options) > 0) {
    foreach ($options as $key=>$choice) {
      $select .= "<option value=\"$key\"". (is_array($value) ? (in_array($key, $value) ? " selected=\"selected\"" : "") : ($value == $key ? " selected=\"selected\"" : "")) .">". check_form($choice) ."</option>";
    }
    return form_item($title, "<select name=\"edit[$name]". ($multiple ? "[]" : "") ."\"". ($multiple ? " multiple " : "") . ($extra ? " $extra" : "") .">$select</select>", $description);
  }
}

function form_radios($title, $name, $value, $options, $description = 0) {
  if (count($options) > 0) {
    foreach ($options as $key=>$choice) {
      $output .= form_radio($choice, $name, $key, ($key == $value));
    }
    return form_item($title, $output, $description);
  }
}

function form_file($title, $name, $size, $description = 0) {
  return form_item($title, "<input type=\"file\" class=\"form-file\" name=\"edit[$name]\" size=\"$size\" />\n", $description);
}

function form_hidden($name, $value) {
  return "<input type=\"hidden\" name=\"edit[$name]\" value=\"". check_form($value) ."\" />\n";
}

function form_submit($value, $name = "op") {
  return "<input type=\"submit\" class=\"form-submit\" name=\"$name\" value=\"". check_form($value) ."\" />\n";
}

function form_weight($title = NULL, $name = "weight", $value = 0, $delta = 10, $description = 0, $extra = 0) {
  for ($n = (-1 * $delta); $n <= $delta; $n++) {
    $weights[$n] = $n;
  }

  return form_select($title, $name, $value, $weights, $description, $extra);
}

function form_allowed_tags_text() {
  return variable_get("allowed_html", "") ? (t("Allowed HTML tags") .": ". htmlspecialchars(variable_get("allowed_html", ""))) : "";
}

function url($url = NULL, $query = NULL) {
  global $base_url;

  static $script;

  if (empty($script)) {
    /*
    ** On some webservers such as IIS we can't omit "index.php".  As such we
    ** generate "index.php?q=foo" instead of "?q=foo" on anything that is not
    ** Apache.
    */
    $script = (strpos($_SERVER["SERVER_SOFTWARE"], "Apache") === false) ? "index.php" : "";
  }

  if (variable_get("clean_url", "0") == "0") {
    if (isset($url)) {
      if (isset($query)) {
        return "$base_url/$script?q=$url&amp;$query";
      }
      else {
        return "$base_url/$script?q=$url";
      }
    }
    else {
      if (isset($query)) {
        return "$base_url/$script?$query";
      }
      else {
        return "$base_url/";
      }
    }
  }
  else {
    if (isset($url)) {
      if (isset($query)) {
        return "$base_url/$url?$query";
      }
      else {
        return "$base_url/$url";
      }
    }
    else {
      if (isset($query)) {
        return "$base_url/$script?$query";
      }
      else {
        return "$base_url/";
      }
    }
  }
}

function l($text, $url, $attributes = array(), $query = NULL) {

  $t = array();
  foreach ($attributes as $key => $value) {
    $t[] = "$key=\"$value\"";
  }

  return "<a href=\"". url($url, $query) ."\" ". implode($t, " ") .">$text</a>";
}

function field_get($string, $name) {
  ereg(",?$name=([^,]+)", ", $string", $regs);
  return $regs[1];
}

function field_set($string, $name, $value) {
  $rval = ereg_replace(",$name=[^,]+", "", ",$string");
  if (isset($value)) {
    $rval .= ($rval == "," ? "" : ",") ."$name=$value";
  }
  return substr($rval, 1);
}

function link_page() {
  global $custom_links, $base_url;

  if (is_array($custom_links)) {
    return $custom_links;
  }
  else {
    $links = module_invoke_all("link", "page");
    array_unshift($links, "<a href=\"$base_url/\" title=\"". t("Return to the main page.") ."\">". t("home") ."</a>");
    return $links;
  }
}

function link_node($node, $main = 0) {
  return module_invoke_all("link", "node", $node, $main);
}

function timer_start() {
  global $timer;
  list($usec, $sec) = explode(" ", microtime());
  $timer = (float)$usec + (float)$sec;
}

function drupal_page_header() {
  if (variable_get("dev_timer", 0)) {
    timer_start();
  }

  if (variable_get("cache", 0)) {
    if ($cache = page_get_cache()) {
      $date = gmdate("D, d M Y H:i:s", $cache->created) ." GMT";
      header("Last-Modified: $date");
      header("ETag: \"$date\"");
      if (function_exists("getallheaders") && $headers = getallheaders()) {
        /*
        ** Notice that the above is an optional Apache-ism so for the
        ** time being we don't send 304 headers when "getallheaders()"
        ** is not supported (eg. on IIS webservers).
        */
        if ($headers["If-Modified-Since"] == $date && $headers["If-None-Match"] == "\"$date\"") {
          header("HTTP/1.0 304 Not Modified");
          exit();
        }
      }
      print $cache->data;
      exit();
    }
  }
}

function drupal_page_footer() {
  if (variable_get("cache", 0)) {
    page_set_cache();
  }

  // a hook for modules where modules may take action at the end of a request
  // good uses include setting a cache, page logging, etc.
  module_invoke_all("exit");
}

unset($conf);

$config = conf_init();

include_once "includes/$config.php";
include_once "includes/database.inc";
include_once "includes/module.inc";
include_once "includes/theme.inc";
include_once "includes/pager.inc";
include_once "includes/menu.inc";
include_once "includes/xmlrpc.inc";

// initialize configuration variables, using values from conf.php if available:
$conf = variable_init(isset($conf) ? $conf : array());

// set error handler:
set_error_handler("error_handler");

// spit out the correct charset http header
header("Content-Type: text/html; charset=utf-8");

// initialize installed modules:
module_init();

// initialize localization system:
$locale = locale_init();

// initialize theme:
$theme = theme_init();

?>