common.inc 33 KB
Newer Older
Dries's avatar
   
Dries committed
1
2
3
4
5
6
7
8
9
10
11
<?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'.
  */

Dries's avatar
   
Dries committed
12
  $uri = $_SERVER["PHP_SELF"];
Dries's avatar
   
Dries committed
13

Dries's avatar
   
Dries committed
14
  $file = strtolower(strtr($_SERVER["HTTP_HOST"] . substr($uri, 0, strrpos($uri, "/")), "/:", ".."));
Dries's avatar
   
Dries committed
15
16
17
18
19
20
21
22
23
24
25
26
27

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

  return "conf";
}

Dries's avatar
   
Dries committed
28
29
30
/**
 * Build the alias/path array
 */
Dries's avatar
   
Dries committed
31
function drupal_get_path_map($action = "") {
Dries's avatar
   
Dries committed
32
33

  static $cache;
Dries's avatar
   
Dries committed
34
35
  static $map;

Dries's avatar
   
Dries committed
36
37
  if ($action == "rebuild") {
    $map = NULL;
Dries's avatar
   
Dries committed
38
    $cache = 0;
Dries's avatar
   
Dries committed
39
40
  }

Dries's avatar
   
Dries committed
41
  if (!$cache) {
Dries's avatar
   
Dries committed
42
    $result = db_query("SELECT * FROM {url_alias}");
Dries's avatar
   
Dries committed
43
    while ($data = db_fetch_object($result)) {
Dries's avatar
   
Dries committed
44
      $map[$data->dst] = $data->src;
Dries's avatar
   
Dries committed
45
    }
Dries's avatar
   
Dries committed
46
47

    $cache = 1;
Dries's avatar
   
Dries committed
48
49
50
51
52
  }

  return $map;
}

Dries's avatar
   
Dries committed
53
54
55
56
function drupal_rebuild_path_map() {
  drupal_get_path_map("rebuild");
}

Dries's avatar
   
Dries committed
57
58
59
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.";
Dries's avatar
   
Dries committed
60
61

  if ($errno & E_ALL ^ E_NOTICE) {
Dries's avatar
   
Dries committed
62
    watchdog("error", $types[$errno] .": $message in $filename on line $line.");
63
    print "<pre>$entry</pre>";
Dries's avatar
   
Dries committed
64
65
66
  }
}

Dries's avatar
   
Dries committed
67
function watchdog($type, $message, $link = NULL) {
Dries's avatar
   
Dries committed
68
  global $user;
Dries's avatar
   
Dries committed
69
  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());
Dries's avatar
   
Dries committed
70
71
72
73
}

function throttle($type, $rate) {
  if (!user_access("access administration pages")) {
Dries's avatar
   
Dries committed
74
    if ($throttle = db_fetch_object(db_query("SELECT * FROM {watchdog} WHERE type = '$type' AND hostname = '". getenv("REMOTE_ADDR") ."' AND ". time() ." - timestamp < $rate"))) {
Dries's avatar
   
Dries committed
75
76
77
78
79
80
81
82
83
      watchdog("warning", "throttle: '". getenv("REMOTE_ADDR") ."' exceeded submission rate - $throttle->type");
      die(message_throttle());
    }
    else {
      watchdog($type, "throttle");
    }
  }
}

Dries's avatar
   
Dries committed
84
85
86
87
function _fix_gpc_magic_array(&$items) {
  foreach ($items as $k => $i) {
    if (is_array($i)) _fix_gpc_magic_array($items[$k]);
    else $items[$k] = stripslashes($i);
Dries's avatar
   
Dries committed
88
89
90
  }
}

Dries's avatar
   
Dries committed
91
92
93
94
95
96
97
98
99
100
101
102
function fix_gpc_magic() {
  static $fixed = false;
  if ($fixed) return;
  if (ini_get("magic_quotes_gpc") == 0) return;

  _fix_gpc_magic_array($_GET);
  _fix_gpc_magic_array($_POST);
  _fix_gpc_magic_array($_COOKIE);

  $fixed = true;
}

Dries's avatar
   
Dries committed
103
104
105
106
107
function arg($index) {

  static $arguments;

  if (empty($arguments)) {
Dries's avatar
   
Dries committed
108
    $arguments = explode("/", $_GET["q"]);
Dries's avatar
   
Dries committed
109
110
111
112
113
  }

  return $arguments[$index];
}

Dries's avatar
   
Dries committed
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
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;
}

Dries's avatar
   
Dries committed
142
143
144
145
146
147
148
149
150
function referer_uri() {

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

    return check_url($uri);
  }
}

Dries's avatar
   
Dries committed
151
function request_uri() {
Dries's avatar
   
Dries committed
152
153
154
155
  /*
  ** Since request_uri() is only available on Apache, we generate
  ** equivalent using other environment vars.
  */
Dries's avatar
   
Dries committed
156

Dries's avatar
   
Dries committed
157
  if (isset($_SERVER["REQUEST_URI"])) {
158
    $uri = $_SERVER["REQUEST_URI"];
Dries's avatar
   
Dries committed
159
160
  }
  else {
161
    $uri = $_SERVER["PHP_SELF"] ."?". $_SERVER["QUERY_STRING"];
Dries's avatar
   
Dries committed
162
  }
163

Dries's avatar
   
Dries committed
164
  return check_url($uri);
Dries's avatar
   
Dries committed
165
166
}

Dries's avatar
   
Dries committed
167
function message_access() {
Dries's avatar
   
Dries committed
168
  return t("You are not authorized to access this page.");
Dries's avatar
   
Dries committed
169
170
171
172
173
174
175
176
177
178
}

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.");
}

Dries's avatar
   
Dries committed
179
180
function locale_init() {
  global $languages, $user;
Dries's avatar
   
Dries committed
181
182
183
184
185
186
  if ($user->uid && $languages[$user->language]) {
    return $user->language;
  }
  else {
    return key($languages);
  }
Dries's avatar
   
Dries committed
187
188
}

Dries's avatar
   
Dries committed
189
function t($string, $args = 0) {
Dries's avatar
   
Dries committed
190
  global $languages;
191

Dries's avatar
   
Dries committed
192
193
194
195
196
197
198
  /*
  ** 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
Dries's avatar
   
Dries committed
199
200
  **           account</a> before viewing the next page.", array("%url"
  **           => url("user/register")));
Dries's avatar
   
Dries committed
201
202
  */

203
  $string = ($languages && module_exist("locale") ? locale($string) : $string);
204

Dries's avatar
   
Dries committed
205
206
  if (!$args) {
    return $string;
Kjartan's avatar
Kjartan committed
207
208
  }
  else {
Dries's avatar
   
Dries committed
209
210
    return strtr($string, $args);
  }
Dries's avatar
   
Dries committed
211
212
213
}

function variable_init($conf = array()) {
Dries's avatar
   
Dries committed
214
  $result = db_query("SELECT * FROM {variable} ");
Dries's avatar
   
Dries committed
215
216
  while ($variable = db_fetch_object($result)) {
    if (!isset($conf[$variable->name])) {
Dries's avatar
   
Dries committed
217
      $conf[$variable->name] = unserialize($variable->value);
Dries's avatar
   
Dries committed
218
219
220
221
222
223
    }
  }

  return $conf;
}

224
function variable_get($name, $default) {
Dries's avatar
   
Dries committed
225
226
227
228
229
230
231
232
  global $conf;

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

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

Dries's avatar
   
Dries committed
233
234
  db_query("DELETE FROM {variable} WHERE name = '%s'", $name);
  db_query("INSERT INTO {variable} (name, value) VALUES ('%s', '%s')", $name, serialize($value));
Dries's avatar
   
Dries committed
235
236
237
238
239
240
241

  $conf[$name] = $value;
}

function variable_del($name) {
  global $conf;

Dries's avatar
   
Dries committed
242
  db_query("DELETE FROM {variable} WHERE name = '%s'", $name);
Dries's avatar
   
Dries committed
243
244
245
246

  unset($conf[$name]);
}

Dries's avatar
   
Dries committed
247
function drupal_specialchars($input, $quotes = ENT_NOQUOTES) {
Dries's avatar
   
Dries committed
248
249
250
251
252
253
254
255
256

  /*
  ** 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);
Dries's avatar
   
Dries committed
257
258
}

Dries's avatar
   
Dries committed
259
function table_cell($cell, $header = 0) {
Dries's avatar
   
Dries committed
260
  if (is_array($cell)) {
Dries's avatar
   
Dries committed
261
262
263
264
265
266
267
268
269
270
271
    $data = $cell["data"];
    foreach ($cell as $key => $value) {
      if ($key != "data")  {
        $attributes .= " $key=\"$value\"";
      }
    }
  }
  else {
    $data = $cell;
  }

Dries's avatar
   
Dries committed
272
  if ($header) {
Dries's avatar
   
Dries committed
273
274
275
276
277
278
279
280
281
282
283
    $output = "<th$attributes>$data</th>";
  }
  else {
    $output = "<td$attributes>$data</td>";
  }

  return $output;
}

function table($header, $rows) {

284
  $output = "<table>\n";
Dries's avatar
   
Dries committed
285
286
287
288
289

  /*
  ** Emit the table header:
  */

Dries's avatar
   
Dries committed
290
291
292
  if (is_array($header)) {
    $output .= " <tr>";
    foreach ($header as $cell) {
Dries's avatar
   
Dries committed
293
294
295
      if (is_array($cell) && $cell["field"]) {
        $cell = tablesort($cell, $header);
      }
Dries's avatar
   
Dries committed
296
297
      $output .= table_cell($cell, 1);
    }
Dries's avatar
   
Dries committed
298
    $output .= " </tr>\n";
Dries's avatar
   
Dries committed
299
300
301
302
303
304
  }

  /*
  ** Emit the table rows:
  */

Dries's avatar
   
Dries committed
305
306
307
308
309
310
311
312
  if (is_array($rows)) {
    foreach ($rows as $number => $row) {
      if ($number % 2 == 1) {
        $output .= " <tr class=\"light\">";
      }
      else {
        $output .= " <tr class=\"dark\">";
      }
Dries's avatar
   
Dries committed
313

Dries's avatar
   
Dries committed
314
315
316
      foreach ($row as $cell) {
        $output .= table_cell($cell, 0);
      }
Dries's avatar
   
Dries committed
317
      $output .= " </tr>\n";
Dries's avatar
   
Dries committed
318
319
320
    }
  }

Dries's avatar
   
Dries committed
321
  $output .= "</table>\n";
Dries's avatar
   
Dries committed
322
323
324
325

  return $output;
}

326
327
328
329
330
331
/**
 * 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
 */
Dries's avatar
   
Dries committed
332
function valid_email_address($mail) {
333
334
335
336
337
338
339
340
341
342
343
344
345
  $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;
  }
}

Dries's avatar
   
Dries committed
346
347
348
349
350
351
352
/**
 * Verify the syntax of the given URL.
 *
 * @param $url  an URL
 */
function valid_url($url) {

Dries's avatar
   
Dries committed
353
  if (preg_match("/^[a-zA-z0-9\/:_\-_\.,]+$/", $url)) {
Dries's avatar
   
Dries committed
354
355
356
357
358
359
360
    return 1;
  }
  else {
    return 0;
  }
}

Kjartan's avatar
Kjartan committed
361
362
363
364
/**
 * Format a single result entry of a search query:
 *
 * @param $item  a single search result as returned by <module>_search of type
Dries's avatar
   
Dries committed
365
 *               array("count" => ..., "link" => ..., "title" => ...,
Kjartan's avatar
Kjartan committed
366
367
368
 *               "user" => ..., "date" => ..., "keywords" => ...)
 * @param $type  module type of this item
 */
Dries's avatar
   
Dries committed
369
function search_item($item, $type) {
Dries's avatar
   
Dries committed
370
371
372
373
374
375
376
377
378
379

  /*
  ** 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 {
Dries's avatar
   
Dries committed
380
    $output .= " <b><u><a href=\"". $item["link"] ."\">". $item["title"] ."</a></u></b><br />";
Dries's avatar
   
Dries committed
381
    $output .= " <small>" . t($type) . ($item["user"] ? " - ". $item["user"] : "") ."". ($item["date"] ? " - ". format_date($item["date"], "small") : "") ."</small>";
Dries's avatar
   
Dries committed
382
383
    $output .= "<br /><br />";
  }
Dries's avatar
   
Dries committed
384
385
386
387

  return $output;
}

Kjartan's avatar
Kjartan committed
388
389
390
391
/**
 * Render a generic search form.
 *
 * "Generic" means "universal usable" - that is, usable not only from
Dries's avatar
   
Dries committed
392
 * 'site.com/search', but also as a simple seach box (without
Dries's avatar
   
Dries committed
393
394
 * "Restrict search to", help text, etc) from theme's header etc.
 * This means: provide options to only conditionally render certain
Kjartan's avatar
Kjartan committed
395
396
 * parts of this form.
 *
Dries's avatar
   
Dries committed
397
 * @param $action  Form action. Defaults to 'site.com/search'.
Dries's avatar
   
Dries committed
398
 * @param $keys   string containing keywords for the search.
Dries's avatar
   
Dries committed
399
 * @param $options != 0: Render additional form fields/text
Kjartan's avatar
Kjartan committed
400
401
 *                 ("Restrict search to", help text, etc).
 */
Dries's avatar
   
Dries committed
402
function search_form($action = NULL, $keys = NULL, $options = NULL) {
Dries's avatar
   
Dries committed
403
404

  if (!$action) {
Dries's avatar
   
Dries committed
405
    $action = url("search");
Dries's avatar
   
Dries committed
406
407
  }

Dries's avatar
   
Dries committed
408
409
  $output .= " <br /><input type=\"text\" class=\"form-text\" size=\"50\" value=\"". check_form($keys) ."\" name=\"keys\" />";
  $output .= " <input type=\"submit\" class=\"form-submit\" value=\"". t("Search") ."\" />\n";
Dries's avatar
   
Dries committed
410
411
412
413
414
415
416

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

    foreach (module_list() as $name) {
      if (module_hook($name, "search")) {
Kjartan's avatar
Kjartan committed
417
        $output .= " <input type=\"checkbox\" name=\"edit[type][$name]\" ". ($edit["type"][$name] ? " checked=\"checked\"" : "") ." /> ". t($name);
Dries's avatar
   
Dries committed
418
419
420
421
      }
    }
  }

Kjartan's avatar
Kjartan committed
422
423
  $form .= "<br />";

Dries's avatar
   
Dries committed
424
425
426
427
  return form($output, "post", $action);
}

/*
Kjartan's avatar
Kjartan committed
428
429
 * Collect the search results:
 */
Dries's avatar
   
Dries committed
430
function search_data($keys = NULL) {
Dries's avatar
   
Dries committed
431
432

  $edit = $_POST["edit"];
Dries's avatar
   
Dries committed
433

Dries's avatar
   
Dries committed
434
  if (isset($keys)) {
Dries's avatar
   
Dries committed
435
    foreach (module_list() as $name) {
Dries's avatar
   
Dries committed
436
      if (module_hook($name, "search") && (!$edit["type"] || $edit["type"][$name]) && ($result = module_invoke($name, "search", $keys))) {
Kjartan's avatar
Kjartan committed
437
        if ($name == "node" || $name == "comment") {
Dries's avatar
   
Dries committed
438
          $output .= "<p><b>". t("Matching ". $name ."s ranked in order of relevance") .":</b></p>";
Kjartan's avatar
Kjartan committed
439
440
        }
        else {
Dries's avatar
   
Dries committed
441
          $output .= "<p><b>". t("Matching ". $name ."s") .":</b></p>";
Kjartan's avatar
Kjartan committed
442
        }
Dries's avatar
   
Dries committed
443
444
445
446
447
448
449
450
451
452
        foreach ($result as $entry) {
          $output .= search_item($entry, $name);
        }
      }
    }
  }

  return $output;
}

Kjartan's avatar
Kjartan committed
453
454
455
/**
 * Display the search form and the resulting data.
 *
Dries's avatar
   
Dries committed
456
 * @param $type    If set, search only nodes of this type.
Kjartan's avatar
Kjartan committed
457
 *                 Otherwise, search all types.
Dries's avatar
   
Dries committed
458
 * @param $action  Form action. Defaults to 'site.com/search'.
Kjartan's avatar
Kjartan committed
459
 * @param $query   Query string. Defaults to global $keys.
Dries's avatar
   
Dries committed
460
 * @param $options != 0: Render additional form fields/text
Kjartan's avatar
Kjartan committed
461
462
 *                 ("Restrict search to", help text, etc).
 */
Dries's avatar
   
Dries committed
463
function search_type($type, $action = NULL, $keys = NULL, $options = NULL) {
Dries's avatar
   
Dries committed
464

Dries's avatar
   
Dries committed
465
  $_POST["edit"]["type"][$type] = "on";
Dries's avatar
   
Dries committed
466

Dries's avatar
   
Dries committed
467
  return search_form($action, $keys, $options) . "<br />". search_data($keys);
Dries's avatar
   
Dries committed
468
469
}

Dries's avatar
   
Dries committed
470

Dries's avatar
   
Dries committed
471
472
function drupal_goto($url) {

Dries's avatar
   
Dries committed
473
474
475
  /*
  ** Translate &amp; to simply &
  */
Dries's avatar
   
Dries committed
476

Dries's avatar
   
Dries committed
477
  $url = str_replace("&amp;", "&", $url);
Dries's avatar
   
Dries committed
478

Dries's avatar
   
Dries committed
479
480
481
482
483
  /*
  ** 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".
  */
Dries's avatar
   
Dries committed
484
  if (!ini_get("session.use_trans_sid") || !session_id() || strstr($url, session_id())) {
Dries's avatar
   
Dries committed
485
486
487
    header("Location: $url");
  }
  else {
Dries's avatar
   
Dries committed
488
489
490
491
492
493
494
495
    $sid = session_name() . "=" . session_id();

    if (strstr($url, "?") && !strstr($url, $sid)) {
      header("Location: $url&". $sid);
    }
    else {
      header("Location: $url?". $sid);
    }
Dries's avatar
   
Dries committed
496
497
498
499
  }

  /*
  ** The "Location" header sends a REDIRECT status code to the http
Dries's avatar
   
Dries committed
500
  ** daemon.  In some cases this can go wrong, so we make sure none
Dries's avatar
   
Dries committed
501
502
503
504
505
506
  ** of the code /below/ gets executed when we redirect.
  */

  exit();
}

Dries's avatar
   
Dries committed
507
function valid_input_data($data) {
508

509
  if (is_array($data) || is_object($data)) {
510
511
512
513
514
    /*
    ** Form data can contain a number of nested arrays.
    */

    foreach ($data as $key => $value) {
Dries's avatar
   
Dries committed
515
516
517
      if (!valid_input_data($value)) {
        return 0;
      }
518
519
520
521
522
523
524
    }
  }
  else {
    /*
    ** Detect evil input data.
    */

Dries's avatar
Dries committed
525
    // check strings:
Dries's avatar
Dries committed
526
    $match  = preg_match("/\Wjavascript\s*:/i", $data);
Dries's avatar
Dries committed
527
528
529
    $match += preg_match("/\Wexpression\s*\(/i", $data);
    $match += preg_match("/\Walert\s*\(/i", $data);

530
    // check attributes:
Dries's avatar
Dries committed
531
    $match += preg_match("/\W(dynsrc|datasrc|data|lowsrc|on[a-z]+)\s*=[^>]+?>/i", $data);
Dries's avatar
   
Dries committed
532

533
534

    // check tags:
Dries's avatar
   
Dries committed
535
    $match += preg_match("/<\s*(applet|script|object|style|embed|form|blink|meta|html|frame|iframe|layer|ilayer|head|frameset|xml)/i", $data);
536
537
538

    if ($match) {
      watchdog("warning", "terminated request because of suspicious input data: ". drupal_specialchars($data));
Dries's avatar
   
Dries committed
539
      return 0;
540
541
    }
  }
Dries's avatar
   
Dries committed
542
543

  return 1;
544
}
Dries's avatar
   
Dries committed
545

546
function check_url($uri) {
Dries's avatar
   
Dries committed
547
548
549
550
551
552
553
554
555
556
557
558
  $uri = htmlspecialchars($uri, ENT_QUOTES);

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

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

  return $uri;
}

Dries's avatar
   
Dries committed
559
function check_form($text) {
Dries's avatar
   
Dries committed
560
  return drupal_specialchars($text, ENT_QUOTES);
Dries's avatar
   
Dries committed
561
562
}

Dries's avatar
   
Dries committed
563
function check_query($text) {
Dries's avatar
   
Dries committed
564
  return addslashes($text);
Dries's avatar
   
Dries committed
565
566
567
}

function filter($text) {
Dries's avatar
   
Dries committed
568

Dries's avatar
   
Dries committed
569
570
571
572
573
574
575
576
577
578
579
580
581
  $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") {
Dries's avatar
   
Dries committed
582
583
584
585
586
      $text = module_invoke($name, "filter", $text);
    }
  }

  return $text;
Dries's avatar
   
Dries committed
587
588
}

Dries's avatar
   
Dries committed
589
590
function rewrite_old_urls($text) {

Dries's avatar
   
Dries committed
591
592
593
594
  global $base_url;

  $end = substr($base_url, 12);

Dries's avatar
   
Dries committed
595
596
597
  /*
  ** This is a *temporary* filter to rewrite old-style URLs to new-style
  ** URLs (clean URLs).  Currently, URLs are being rewritten dynamically
Dries's avatar
   
Dries committed
598
599
  ** (ie. "on output"), however when these rewrite rules have been tested
  ** enough, we will use them to permanently rewrite the links in node
Dries's avatar
   
Dries committed
600
601
602
  ** and comment bodies.
  */

Dries's avatar
   
Dries committed
603
  if (variable_get("clean_url", "0") == "0") {
Dries's avatar
   
Dries committed
604
605
606
607
608
609
610
611
612
613
614
615
616
617
618
619
    /*
    ** 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:
    */

Dries's avatar
   
Dries committed
620
    // rewrite 'node.php?id=<number>[&cid=<number>]' style URLs:
Dries's avatar
   
Dries committed
621
    $text = eregi_replace("$end/(node)\.php\?id=([[:digit:]]+)(&cid=)?([[:digit:]]*)", "$end/?q=\\1/view/\\2/\\4", $text);
Dries's avatar
   
Dries committed
622

Dries's avatar
   
Dries committed
623
    // rewrite 'module.php?mod=<name>{&<op>=<value>}' style URLs:
Dries's avatar
   
Dries committed
624
625
626
    $text = ereg_replace("$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);
Dries's avatar
   
Dries committed
627
628
  }
  else {
Dries's avatar
   
Dries committed
629
630
631
632
    /*
    ** Relative URLs:
    */

Dries's avatar
   
Dries committed
633
    // rewrite 'node.php?id=<number>[&cid=<number>]' style URLs:
Dries's avatar
   
Dries committed
634
    $text = eregi_replace("\"(node)\.php\?id=([[:digit:]]+)(&cid=)?([[:digit:]]*)", "\"\\1/view/\\2/\\4", $text);
Dries's avatar
   
Dries committed
635
636

    // rewrite 'module.php?mod=<name>{&<op>=<value>}' style URLs:
Dries's avatar
   
Dries committed
637
638
639
640
641
642
643
644
645
646
647
648
649
650
651
652
    $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);
}
Dries's avatar
   
Dries committed
653

Dries's avatar
   
Dries committed
654
655
656
  return $text;
}

Dries's avatar
   
Dries committed
657
function check_output($text) {
Dries's avatar
   
Dries committed
658
  if (isset($text)) {
Dries's avatar
   
Dries committed
659
660
661
662
    // filter content on output:
    $text = filter($text);

    // get the line breaks right:
Dries's avatar
   
Dries committed
663
    if (strip_tags($text, "<a><i><b><u><tt><code><cite><strong><img>") == $text) {
Dries's avatar
   
Dries committed
664
665
666
667
668
669
670
671
      $text = nl2br($text);
    }
  }
  else {
    $text = message_na();
  }

  return $text;
Dries's avatar
   
Dries committed
672
673
}

674

675
676
function check_file($filename) {
  return is_uploaded_file($filename);
Dries's avatar
   
Dries committed
677
678
}

Dries's avatar
   
Dries committed
679
680
681
function format_rss_channel($title, $link, $description, $items, $language = "en", $args = array()) {
  // arbitrary elements may be added using the $args associative array

Dries's avatar
   
Dries committed
682
  $output .= "<channel>\n";
Dries's avatar
   
Dries committed
683
684
685
686
  $output .= " <title>". drupal_specialchars(strip_tags($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";
Dries's avatar
   
Dries committed
687
  foreach ($args as $key => $value) {
Dries's avatar
   
Dries committed
688
    $output .= " <$key>". drupal_specialchars(strip_tags($value)) ."</$key>\n";
Dries's avatar
   
Dries committed
689
  }
Dries's avatar
   
Dries committed
690
691
692
693
694
695
  $output .= $items;
  $output .= "</channel>\n";

  return $output;
}

Dries's avatar
   
Dries committed
696
697
698
function format_rss_item($title, $link, $description, $args = array()) {
  // arbitrary elements may be added using the $args associative array

Dries's avatar
   
Dries committed
699
  $output .= "<item>\n";
Dries's avatar
   
Dries committed
700
701
702
  $output .= " <title>". drupal_specialchars(strip_tags($title)) ."</title>\n";
  $output .= " <link>". drupal_specialchars(strip_tags($link)) ."</link>\n";
  $output .= " <description>". drupal_specialchars(check_output($description)) ."</description>\n";
Dries's avatar
   
Dries committed
703
  foreach ($args as $key => $value) {
Dries's avatar
   
Dries committed
704
    $output .= "<$key>". drupal_specialchars(strip_tags($value)) ."</$key>";
Dries's avatar
   
Dries committed
705
  }
Dries's avatar
   
Dries committed
706
707
708
709
710
  $output .= "</item>\n";

  return $output;
}

Dries's avatar
   
Dries committed
711
712
713
714
715
716
717
718
719
720
721
722
723
724
/**
 * 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".
 */
Dries's avatar
   
Dries committed
725
function format_plural($count, $singular, $plural) {
Dries's avatar
   
Dries committed
726
  return t($count == 1 ? $singular : $plural, array("%count" => $count));
Dries's avatar
   
Dries committed
727
728
729
}

function format_size($size) {
Dries's avatar
   
Dries committed
730
  $suffix = t("bytes");
Dries's avatar
   
Dries committed
731
732
  if ($size > 1024) {
    $size = round($size / 1024, 2);
Dries's avatar
   
Dries committed
733
    $suffix = t("KB");
Dries's avatar
   
Dries committed
734
735
736
  }
  if ($size > 1024) {
    $size = round($size / 1024, 2);
Dries's avatar
   
Dries committed
737
    $suffix = t("MB");
Dries's avatar
   
Dries committed
738
  }
Dries's avatar
   
Dries committed
739
  return t("%size %suffix", array("%size" => $size, "%suffix" => $suffix));
Dries's avatar
   
Dries committed
740
741
}

Dries's avatar
   
Dries committed
742
function cache_get($key) {
Dries's avatar
   
Dries committed
743
  $cache = db_fetch_object(db_query("SELECT data, created FROM {cache} WHERE cid = '%s'", $key));
Dries's avatar
   
Dries committed
744
  return $cache->data ? $cache : 0;
Dries's avatar
   
Dries committed
745
746
747
}

function cache_set($cid, $data, $expire = 0) {
Dries's avatar
   
Dries committed
748
749
  db_query("UPDATE {cache} SET data = '%s', created = %d, expire = %d WHERE cid = '%s'", $data, time(), $expire, $cid);
  if (!db_affected_rows()) {
Dries's avatar
   
Dries committed
750
    db_query("INSERT INTO {cache} (cid, data, created, expire) VALUES('%s', '%s', %d, %d)", $cid, $data, time(), $expire);
Dries's avatar
   
Dries committed
751
  }
Dries's avatar
   
Dries committed
752
753
}

Dries's avatar
   
Dries committed
754
755
function cache_clear_all($cid = NULL) {
  if (empty($cid)) {
Dries's avatar
   
Dries committed
756
    db_query("DELETE FROM {cache} WHERE expire <> 0");
Dries's avatar
   
Dries committed
757
758
  }
  else {
Dries's avatar
   
Dries committed
759
    db_query("DELETE FROM {cache} WHERE cid = '%s'", $cid);
Dries's avatar
   
Dries committed
760
  }
Dries's avatar
   
Dries committed
761
762
763
}

function page_set_cache() {
Dries's avatar
   
Dries committed
764
  global $user;
Dries's avatar
   
Dries committed
765

Dries's avatar
   
Dries committed
766
  if (!$user->uid && $_SERVER["REQUEST_METHOD"] == "GET") {
Dries's avatar
   
Dries committed
767
    if ($data = ob_get_contents()) {
Dries's avatar
   
Dries committed
768
      cache_set(request_uri(), $data, 1);
Dries's avatar
   
Dries committed
769
770
771
772
    }
  }
}

Dries's avatar
   
Dries committed
773
function page_get_cache() {
Dries's avatar
   
Dries committed
774
  global $user;
Dries's avatar
   
Dries committed
775

Dries's avatar
   
Dries committed
776
777
  $cache = NULL;

Dries's avatar
   
Dries committed
778
  if (!$user->uid && $_SERVER["REQUEST_METHOD"] == "GET") {
Dries's avatar
   
Dries committed
779
780
781
    $cache = cache_get(request_uri());

    if (empty($cache)) {
Dries's avatar
   
Dries committed
782
      ob_start();
Dries's avatar
   
Dries committed
783
784
    }
  }
Dries's avatar
   
Dries committed
785

Dries's avatar
   
Dries committed
786
  return $cache;
Dries's avatar
   
Dries committed
787
788
789
}

function format_interval($timestamp) {
Dries's avatar
   
Dries committed
790
  $units = array("1 year|%count years" => 31536000, "1 week|%count weeks" => 604800, "1 day|%count days" => 86400, "1 hour|%count hours" => 3600, "1 min|%count min" => 60, "1 sec|%count sec" => 1);
Kjartan's avatar
Kjartan committed
791
  foreach ($units as $key=>$value) {
Dries's avatar
   
Dries committed
792
793
794
795
796
797
    $key = explode("|", $key);
    if ($timestamp >= $value) {
      $output .= ($output ? " " : "") . format_plural(floor($timestamp / $value), $key[0], $key[1]);
      $timestamp %= $value;
    }
  }
Dries's avatar
   
Dries committed
798
  return ($output) ? $output : t("0 sec");
Dries's avatar
   
Dries committed
799
800
801
802
803
}

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

Kjartan's avatar
Kjartan committed
804
  $timestamp += ($user->timezone) ? $user->timezone - date("Z") : 0;
Dries's avatar
   
Dries committed
805
806
807

  switch ($type) {
    case "small":
Dries's avatar
   
Dries committed
808
      $format = variable_get("date_format_short", "m/d/Y - H:i");
Dries's avatar
   
Dries committed
809
810
      break;
    case "large":
Dries's avatar
   
Dries committed
811
      $format = variable_get("date_format_long", "l, F j, Y - H:i");
Dries's avatar
   
Dries committed
812
813
      break;
    case "custom":
Dries's avatar
   
Dries committed
814
      // No change to format
Dries's avatar
   
Dries committed
815
      break;
Dries's avatar
   
Dries committed
816
    case "medium":
Dries's avatar
   
Dries committed
817
    default:
Dries's avatar
   
Dries committed
818
819
820
821
822
823
824
825
826
827
828
829
830
      $format = variable_get("date_format_medium", "D, m/d/Y - H:i");
  }

  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;
    }
Dries's avatar
   
Dries committed
831
832
833
834
835
836
837
  }
  return $date;
}

function format_name($object) {

  if ($object->uid && $object->name) {
Dries's avatar
Dries committed
838
839
840
841
842
843
844
845
846
847
848
849
    /*
    ** Shorten the name when it is too long or it will break many
    ** tables.
    */

    if (strlen($object->name) > 20) {
      $name = substr($object->name, 0, 15) ."...";
    }
    else {
      $name = $object->name;
    }

Dries's avatar
   
Dries committed
850
    if (arg(0) == "admin") {
Dries's avatar
Dries committed
851
      $output = l($name, "admin/user/edit/$object->uid", array("title" => t("Administer user profile.")));
Dries's avatar
   
Dries committed
852
853
    }
    else {
Dries's avatar
Dries committed
854
      $output = l($name, "user/view/$object->uid", array("title" => t("View user profile.")));
Dries's avatar
   
Dries committed
855
    }
Dries's avatar
   
Dries committed
856
  }
Dries's avatar
   
Dries committed
857
858
859
860
861
862
863
864
865
866
  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;
  }
Dries's avatar
   
Dries committed
867
  else {
Dries's avatar
   
Dries committed
868
    $output = t(variable_get("anonymous", "Anonymous"));
Dries's avatar
   
Dries committed
869
870
  }

Dries's avatar
   
Dries committed
871
  return $output;
Dries's avatar
   
Dries committed
872
873
874
}

function form($form, $method = "post", $action = 0, $options = 0) {
Dries's avatar
   
Dries committed
875
876

  if (!$action) {
877
    $action = request_uri();
Dries's avatar
   
Dries committed
878
  }
879
  return "<form action=\"$action\" method=\"$method\"". drupal_attributes($options) .">\n$form\n</form>\n";
Dries's avatar
   
Dries committed
880
881
882
}

function form_item($title, $value, $description = 0) {
Dries's avatar
   
Dries committed
883
  return "<div class=\"form-item\">". ($title ? "<div class=\"title\">$title:</div>" : "") . $value . ($description ? "<div class=\"description\">$description</div>" : "") ."</div>\n";
Dries's avatar
   
Dries committed
884
}
Dries's avatar
   
Dries committed
885
886
887
function form_group($legend, $group, $description = 0) {
  return "<fieldset>" . ($legend ? "<legend>$legend</legend>" : "") . $group . ($description ? "<div class=\"description\">$description</div>" : "") . "</fieldset>\n";
}
Dries's avatar
   
Dries committed
888

889
890
function form_radio($title, $name, $value = 1, $checked = 0, $description = 0, $attributes = 0) {
  return form_item(0, "<input type=\"radio\" class=\"form-radio\" name=\"edit[$name]\" value=\"". $value ."\"". ($checked ? " checked=\"checked\"" : "") . drupal_attributes($attributes) ." /> $title", $description);
Dries's avatar
   
Dries committed
891
892
}

893
894
function form_checkbox($title, $name, $value = 1, $checked = 0, $description = 0, $attributes = 0) {
  return form_hidden($name, 0) . form_item(0, "<input type=\"checkbox\" class=\"form-checkbox\" name=\"edit[$name]\" value=\"". $value ."\"". ($checked ? " checked=\"checked\"" : "") . drupal_attributes($attributes) ." /> $title", $description);
Dries's avatar
   
Dries committed
895
896
}

897
function form_textfield($title, $name, $value, $size, $maxlength, $description = 0, $attributes = 0) {
Dries's avatar
   
Dries committed
898
  $size = $size ? " size=\"$size\"" : "";
899
  return form_item($title, "<input type=\"text\" maxlength=\"$maxlength\" class=\"form-text\" name=\"edit[$name]\"$size value=\"". check_form($value) ."\"". drupal_attributes($attributes) ." />", $description);
Dries's avatar
   
Dries committed
900
901
}

902
function form_password($title, $name, $value, $size, $maxlength, $description = 0, $attributes = 0) {
Dries's avatar
   
Dries committed
903
  $size = $size ? " size=\"$size\"" : "";
904
  return form_item($title, "<input type=\"password\" class=\"form-password\" maxlength=\"$maxlength\" name=\"edit[$name]\"$size value=\"". check_form($value) ."\"". drupal_attributes($attributes) ." />", $description);
Dries's avatar
   
Dries committed
905
906
}

907
function form_textarea($title, $name, $value, $cols, $rows, $description = 0, $attributes = 0) {
Dries's avatar
   
Dries committed
908
  $cols = $cols ? " cols=\"$cols\"" : "";
Dries's avatar
   
Dries committed
909
  module_invoke_all("textarea", $name);  // eg. optionally plug in a WYSIWYG editor
910
  return form_item($title, "<textarea wrap=\"virtual\"$cols rows=\"$rows\" name=\"edit[$name]\" id=\"edit[$name]\"". drupal_attributes($attributes) .">". check_form($value) ."</textarea>", $description);
Dries's avatar
   
Dries committed
911
912
}

Dries's avatar
   
Dries committed
913
function form_select($title, $name, $value, $options, $description = 0, $extra = 0, $multiple = 0) {
Dries's avatar
   
Dries committed
914
  if (count($options) > 0) {
Kjartan's avatar
Kjartan committed
915
    foreach ($options as $key=>$choice) {
916
      $select .= "<option value=\"$key\"". (is_array($value) ? (in_array($key, $value) ? " selected=\"selected\"" : "") : ($value == $key ? " selected=\"selected\"" : "")) .">". check_form($choice) ."</option>";
Dries's avatar
   
Dries committed
917
    }
Kjartan's avatar
Kjartan committed
918
    return form_item($title, "<select name=\"edit[$name]". ($multiple ? "[]" : "") ."\"". ($multiple ? " multiple " : "") . ($extra ? " $extra" : "") .">$select</select>", $description);
Dries's avatar
   
Dries committed
919
920
921
  }
}

Dries's avatar
   
Dries committed
922
923
924
925
926
927
928
929
930
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);
  }
}

931
932
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);
Dries's avatar
   
Dries committed
933
934
935
936
937
938
}

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

939
function form_submit($value, $name = "op", $attributes = 0) {
Dries's avatar
   
Dries committed
940
  return "<input type=\"submit\" class=\"form-submit\" name=\"$name\" value=\"". check_form($value) ."\" />\n";
Dries's avatar
   
Dries committed
941
942
}

Dries's avatar
   
Dries committed
943
function form_weight($title = NULL, $name = "weight", $value = 0, $delta = 10, $description = 0, $extra = 0) {
Dries's avatar
   
Dries committed
944
  for ($n = (-1 * $delta); $n <= $delta; $n++) {
Dries's avatar
   
Dries committed
945
946
947
948
949
950
    $weights[$n] = $n;
  }

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

Dries's avatar
   
Dries committed
951
952
953
954
function form_allowed_tags_text() {
  return variable_get("allowed_html", "") ? (t("Allowed HTML tags") .": ". htmlspecialchars(variable_get("allowed_html", ""))) : "";
}

Dries's avatar
   
Dries committed
955
956
957
/**
 * Given an old url, return the alias.
 */
Dries's avatar
   
Dries committed
958
959
function drupal_get_path_alias($path) {
  $map = drupal_get_path_map();
Dries's avatar
   
Dries committed
960

Dries's avatar
   
Dries committed
961
962
963
  if ($map) {
    return array_search($path, $map);
  }
Dries's avatar
   
Dries committed
964
965
966
}

/**
Dries's avatar
   
Dries committed
967
 * Given an alias, return the default url.
Dries's avatar
   
Dries committed
968
 */
Dries's avatar
   
Dries committed
969
970
function drupal_get_normal_path($path) {
  $map = drupal_get_path_map();
Dries's avatar
   
Dries committed
971
972
973
  return $map[$path];
}

Dries's avatar
   
Dries committed
974
function url($url = NULL, $query = NULL) {
Dries's avatar
   
Dries committed
975
  global $base_url;
Dries's avatar
   
Dries committed
976

Dries's avatar
   
Dries committed
977
978
979
980
981
982
983
984
985
986
987
  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" : "";
  }

Dries's avatar
   
Dries committed
988
  if ($alias = drupal_get_path_alias($url)) {
Dries's avatar
   
Dries committed
989
990
991
    $url = $alias;
  }

Dries's avatar
   
Dries committed
992
  if (variable_get("clean_url", "0") == "0") {
Dries's avatar
   
Dries committed
993
994
    if (isset($url)) {
      if (isset($query)) {
Dries's avatar
   
Dries committed
995
        return "$base_url/$script?q=$url&amp;$query";
Dries's avatar
   
Dries committed
996
997
      }
      else {
Dries's avatar
   
Dries committed
998
        return "$base_url/$script?q=$url";
Dries's avatar
   
Dries committed
999
      }
Dries's avatar
   
Dries committed
1000
1001
    }
    else {
Dries's avatar
   
Dries committed
1002
      if (isset($query)) {
Dries's avatar
   
Dries committed
1003
        return "$base_url/$script?$query";
Dries's avatar
   
Dries committed
1004
1005
      }
      else {
Dries's avatar
   
Dries committed
1006
        return "$base_url/";
Dries's avatar
   
Dries committed
1007
      }
Dries's avatar
   
Dries committed
1008
1009
1010
    }
  }
  else {
Dries's avatar
   
Dries committed
1011
1012
    if (isset($url)) {
      if (isset($query)) {
Dries's avatar
   
Dries committed
1013
        return "$base_url/$url?$query";
Dries's avatar
   
Dries committed
1014
1015
      }
      else {
Dries's avatar
   
Dries committed
1016
        return "$base_url/$url";
Dries's avatar
   
Dries committed
1017
      }
Dries's avatar
   
Dries committed
1018
    }
Dries's avatar
   
Dries committed
1019
    else {
Dries's avatar
   
Dries committed
1020
      if (isset($query)) {
Dries's avatar
   
Dries committed
1021
        return "$base_url/$script?$query";
Dries's avatar
   
Dries committed
1022
1023
      }
      else {
Dries's avatar
   
Dries committed
1024
        return "$base_url/";
Dries's avatar
   
Dries committed
1025
      }
Dries's avatar
   
Dries committed
1026
    }
Dries's avatar
   
Dries committed
1027
  }
Dries's avatar
   
Dries committed
1028
1029
}

1030
1031
1032
1033
1034
1035
1036
function drupal_attributes($attributes = 0) {
  if (is_array($attributes)) {
    $t = array();
    foreach ($attributes as $key => $value) {
      $t[] = "$key=\"$value\"";
    }
    return " ". implode($t, " ");
Dries's avatar
   
Dries committed
1037
  }
1038
}
Dries's avatar
   
Dries committed
1039

1040
1041
function l($text, $url, $attributes = array(), $query = NULL) {
  return "<a href=\"". url($url, $query) ."\"". drupal_attributes($attributes) .">$text</a>";
Dries's avatar
   
Dries committed
1042
1043
}

Dries's avatar
   
Dries committed
1044
function field_get($string, $name) {
1045
  ereg(",?$name=([^,]+)", ", $string", $regs);
Dries's avatar
   
Dries committed
1046
1047
1048
1049
1050
  return $regs[1];
}

function field_set($string, $name, $value) {
  $rval = ereg_replace(",$name=[^,]+", "", ",$string");
Dries's avatar
   
Dries committed
1051
  if (isset($value)) {
Kjartan's avatar
Kjartan committed
1052
1053
    $rval .= ($rval == "," ? "" : ",") ."$name=$value";
  }
Dries's avatar
   
Dries committed
1054
1055
1056
1057
  return substr($rval, 1);
}

function link_page() {
1058
  global $custom_links;
Dries's avatar
   
Dries committed
1059

1060
  if (is_array($custom_links)) {
1061
1062
1063
    return $custom_links;
  }
  else {
Dries's avatar
   
Dries committed
1064
    $links = module_invoke_all("link", "page");
1065
    array_unshift($links, l(t("home"), "", array("title" => t("Return to the main page."))));
1066
    return $links;
Dries's avatar
   
Dries committed
1067
  }
Dries's avatar
   
Dries committed
1068
}
Dries's avatar
   
Dries committed
1069
1070

function link_node($node, $main = 0) {
Dries's avatar
   
Dries committed
1071
  return module_invoke_all("link", "node", $node, $main);
Dries's avatar
   
Dries committed
1072
1073
1074
1075
}

function timer_start() {
  global $timer;
Dries's avatar
   
Dries committed
1076
1077
  list($usec, $sec) = explode(" ", microtime());
  $timer = (float)$usec + (float)$sec;
Dries's avatar
   
Dries committed
1078
1079
}

Dries's avatar
   
Dries committed
1080
function drupal_page_header() {
1081

Dries's avatar
   
Dries committed
1082
1083
1084
1085
1086
  if (variable_get("dev_timer", 0)) {
    timer_start();
  }

  if (variable_get("cache", 0)) {
Dries's avatar
   
Dries committed
1087
    if ($cache = page_get_cache()) {
Dries's avatar
   
Dries committed
1088
1089

      // Set default values:
Dries's avatar
   
Dries committed
1090
      $date = gmdate("D, d M Y H:i:s", $cache->created) ." GMT";
Dries's avatar
   
Dries committed
1091
1092
1093
      $etag = '"'. md5($date) .'"';

      // Check http headers:
1094
      $modified_since = isset($_SERVER["HTTP_IF_MODIFIED_SINCE"]) ? $_SERVER["HTTP_IF_MODIFIED_SINCE"] == $date : NULL;
1095
      $none_match = isset($_SERVER["HTTP_IF_NONE_MATCH"]) ? $_SERVER["HTTP_IF_NONE_MATCH"] == $etag : NULL;
Dries's avatar
   
Dries committed
1096

1097
1098
      // The type checking here is very important, be careful when changing entries.
      if (($modified_since !== NULL || $none_match !== NULL) && $modified_since !== false && $none_match !== false) {
Dries's avatar
   
Dries committed
1099
1100
        header("HTTP/1.0 304 Not Modified");
        exit();
Dries's avatar
   
Dries committed
1101
      }
Dries's avatar
   
Dries committed
1102

1103
1104
1105
      // Send appropriate response:
      header("Last-Modified: $date");
      header("ETag: $etag");
Dries's avatar
   
Dries committed
1106
      print $cache->data;
Dries's avatar
   
Dries committed
1107
1108
1109
1110
1111
1112
1113
1114

      /*
      ** 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");

Dries's avatar
   
Dries committed
1115
1116
1117
      exit();
    }
  }
Dries's avatar
   
Dries committed
1118
1119
1120
1121
1122
1123
1124
1125

  /*
  ** Putting the check here avoids SQL query overhead in case we are
  ** serving cached pages.  The downside, however, is that the init
  ** hooks might use unchecked data.
  */

  if (!user_access("bypass input data check")) {
Dries's avatar
   
Dries committed
1126
1127
1128
    if (!valid_input_data($_REQUEST)) {
      die("terminated request because of suspicious input data");
    }
Dries's avatar
   
Dries committed
1129
  }