common.inc 59.1 KB
Newer Older
Dries's avatar
   
Dries committed
1
<?php
Dries's avatar
Dries committed
2
/* $Id$ */
Dries's avatar
   
Dries committed
3

Dries's avatar
   
Dries committed
4
5
6
7
8
9
10
11
/**
 * @file
 * Common functions that many Drupal modules will need to reference.
 *
 * The functions that are critical and need to be available even when serving
 * a cached page are instead located in bootstrap.inc.
 */

Kjartan's avatar
Kjartan committed
12
/**
Dries's avatar
   
Dries committed
13
 * Set the title of the current page, for display on the page and in the title bar.
Dries's avatar
   
Dries committed
14
 */
Dries's avatar
   
Dries committed
15
16
17
18
function drupal_set_title($title = NULL) {
  static $stored_title;

  if (isset($title)) {
Dries's avatar
   
Dries committed
19
    $stored_title = $title;
Dries's avatar
   
Dries committed
20
21
22
23
  }
  return $stored_title;
}

Dries's avatar
   
Dries committed
24
25
26
/**
 * Get the title of the current page, for display on the page and in the title bar.
 */
Dries's avatar
   
Dries committed
27
28
29
30
31
32
33
34
35
36
37
function drupal_get_title() {
  $title = drupal_set_title();

  if (!isset($title)) {
    $title = menu_get_active_title();
  }

  return $title;
}

/**
Dries's avatar
   
Dries committed
38
 * Set the breadcrumb trail for the current page.
Dries's avatar
   
Dries committed
39
 *
Dries's avatar
   
Dries committed
40
41
42
 * @param $breadcrumb
 *   Array of links, starting with "home" and proceeding up to but not including
 *   the current page.
Kjartan's avatar
Kjartan committed
43
 */
Dries's avatar
   
Dries committed
44
45
46
47
48
49
50
51
52
function drupal_set_breadcrumb($breadcrumb = NULL) {
  static $stored_breadcrumb;

  if (isset($breadcrumb)) {
    $stored_breadcrumb = $breadcrumb;
  }
  return $stored_breadcrumb;
}

Dries's avatar
   
Dries committed
53
54
55
/**
 * Get the breadcrumb trail for the current page.
 */
Dries's avatar
   
Dries committed
56
57
58
59
60
61
62
63
64
65
function drupal_get_breadcrumb() {
  $breadcrumb = drupal_set_breadcrumb();

  if (!isset($breadcrumb)) {
    $breadcrumb = menu_get_active_breadcrumb();
  }

  return $breadcrumb;
}

Dries's avatar
Dries committed
66
/**
Dries's avatar
   
Dries committed
67
 * Add output to the head tag of the HTML page.
Dries's avatar
Dries committed
68
69
 */
function drupal_set_html_head($data = NULL) {
Dries's avatar
   
Dries committed
70
  static $stored_head = '';
Dries's avatar
Dries committed
71
72

  if (!is_null($data)) {
Dries's avatar
   
Dries committed
73
    $stored_head .= $data ."\n";
Dries's avatar
Dries committed
74
75
76
77
  }
  return $stored_head;
}

Dries's avatar
   
Dries committed
78
79
80
/**
 * Retrieve output to be displayed in the head tag of the HTML page.
 */
Dries's avatar
Dries committed
81
82
83
function drupal_get_html_head() {
  global $base_url;

Dries's avatar
   
Dries committed
84
  $output = "<meta http-equiv=\"Content-Type\" content=\"text/html; charset=utf-8\" />\n";
Dries's avatar
Dries committed
85
  $output .= "<base href=\"$base_url/\" />\n";
Dries's avatar
   
Dries committed
86
  $output .= theme('stylesheet_import', 'misc/drupal.css');
Dries's avatar
Dries committed
87
88
89
90

  return $output . drupal_set_html_head();
}

Dries's avatar
   
Dries committed
91
/**
Dries's avatar
   
Dries committed
92
 * Return an array mapping path aliases to their internal Drupal paths.
Dries's avatar
   
Dries committed
93
 */
Dries's avatar
   
Dries committed
94
function drupal_get_path_map($action = '') {
Dries's avatar
Dries committed
95
  static $map = NULL;
Dries's avatar
   
Dries committed
96

Dries's avatar
   
Dries committed
97
  if ($action == 'rebuild') {
Dries's avatar
   
Dries committed
98
99
100
    $map = NULL;
  }

Dries's avatar
Dries committed
101
  if (is_null($map)) {
Dries's avatar
   
Dries committed
102
    $map = array();  // Make $map non-null in case no aliases are defined.
Dries's avatar
   
Dries committed
103
    $result = db_query('SELECT * FROM {url_alias}');
Dries's avatar
   
Dries committed
104
    while ($data = db_fetch_object($result)) {
Dries's avatar
   
Dries committed
105
      $map[$data->dst] = $data->src;
Dries's avatar
   
Dries committed
106
107
108
109
110
111
    }
  }

  return $map;
}

Dries's avatar
   
Dries committed
112
113
114
/**
 * Regenerate the path map from the information in the database.
 */
Dries's avatar
   
Dries committed
115
function drupal_rebuild_path_map() {
Dries's avatar
   
Dries committed
116
  drupal_get_path_map('rebuild');
Dries's avatar
   
Dries committed
117
}
Kjartan's avatar
Kjartan committed
118
119

/**
Dries's avatar
   
Dries committed
120
 * Given an internal Drupal path, return the alias set by the administrator.
Kjartan's avatar
Kjartan committed
121
 */
Dries's avatar
   
Dries committed
122
123
124
125
function drupal_get_path_alias($path) {
  if (($map = drupal_get_path_map()) && ($newpath = array_search($path, $map))) {
    return $newpath;
  }
Dries's avatar
   
Dries committed
126
  elseif (function_exists('conf_url_rewrite')) {
Dries's avatar
   
Dries committed
127
128
    return conf_url_rewrite($path, 'outgoing');
  }
129
130
131
132
  else {
    // No alias found. Return the normal path.
    return $path;
  }
Dries's avatar
   
Dries committed
133
134
135
}

/**
Dries's avatar
   
Dries committed
136
 * Given a path alias, return the internal path it represents.
Dries's avatar
   
Dries committed
137
138
139
140
141
 */
function drupal_get_normal_path($path) {
  if (($map = drupal_get_path_map()) && isset($map[$path])) {
    return $map[$path];
  }
Dries's avatar
   
Dries committed
142
  elseif (function_exists('conf_url_rewrite')) {
Dries's avatar
   
Dries committed
143
144
145
146
147
148
    return conf_url_rewrite($path, 'incoming');
  }
  else {
    return $path;
  }
}
Kjartan's avatar
Kjartan committed
149

Dries's avatar
Dries committed
150
/**
Dries's avatar
   
Dries committed
151
 * Set an HTTP response header for the current page.
Dries's avatar
Dries committed
152
153
 */
function drupal_set_header($header = NULL) {
154
  // We use an array to guarantee there are no leading or trailing delimiters.
Dries's avatar
   
Dries committed
155
  // Otherwise, header('') could get called when serving the page later, which
156
157
  // ends HTTP headers prematurely on some PHP versions.
  static $stored_headers = array();
Dries's avatar
Dries committed
158

159
  if (strlen($header)) {
Dries's avatar
Dries committed
160
    header($header);
161
    $stored_headers[] = $header;
Dries's avatar
Dries committed
162
  }
163
  return implode("\n", $stored_headers);
Dries's avatar
Dries committed
164
165
}

Dries's avatar
   
Dries committed
166
167
168
/**
 * Get the HTTP response headers for the current page.
 */
Dries's avatar
Dries committed
169
170
171
172
function drupal_get_headers() {
  return drupal_set_header();
}

Dries's avatar
   
Dries committed
173
174
175
/**
 * @name HTTP handling
 * @{
Dries's avatar
   
Dries committed
176
 * Functions to properly handle HTTP responses.
Dries's avatar
   
Dries committed
177
178
 */

Kjartan's avatar
Kjartan committed
179
/**
Dries's avatar
   
Dries committed
180
 * Send the user to a different Drupal page.
Kjartan's avatar
Kjartan committed
181
 *
Dries's avatar
   
Dries committed
182
183
 * This issues an on-site HTTP redirect. The function makes sure the redirected
 * URL is formatted correctly.
Kjartan's avatar
Kjartan committed
184
 *
Dries's avatar
   
Dries committed
185
186
187
188
189
190
191
192
193
194
195
196
197
 * It is advised to use drupal_goto() instead of PHP's header(), because
 * drupal_goto() will append the user's session ID to the URI when PHP is
 * compiled with "--enable-trans-sid".
 *
 * This function ends the request; use it rather than a print theme('page')
 * statement in your menu callback.
 *
 * @param $path
 *   A Drupal path.
 * @param $query
 *   The query string component, if any.
 * @param $fragment
 *   The destination fragment identifier (named anchor).
Kjartan's avatar
Kjartan committed
198
 */
Dries's avatar
   
Dries committed
199
200
201
function drupal_goto($path = '', $query = NULL, $fragment = NULL) {
  // Translate &amp; to simply & in the absolute URL.
  $url = str_replace('&amp;', '&', url($path, $query, $fragment, TRUE));
Kjartan's avatar
Kjartan committed
202

Dries's avatar
   
Dries committed
203
204
  if (ini_get('session.use_trans_sid') && session_id() && !strstr($url, session_id())) {
    $sid = session_name() . '=' . session_id();
Dries's avatar
   
Dries committed
205

Dries's avatar
   
Dries committed
206
207
    if (strstr($url, '?') && !strstr($url, $sid)) {
      $url = $url .'&'. $sid;
Kjartan's avatar
Kjartan committed
208
209
    }
    else {
Dries's avatar
   
Dries committed
210
      $url = $url .'?'. $sid;
Kjartan's avatar
Kjartan committed
211
212
213
    }
  }

Dries's avatar
   
Dries committed
214
215
216
217
  // Before the redirect, allow modules to react to the end of the page request.
  module_invoke_all('exit', $url);

  header('Location: '. $url);
Kjartan's avatar
Kjartan committed
218

Dries's avatar
   
Dries committed
219
220
221
  // 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 the drupal_goto() call gets executed when we redirect.
Kjartan's avatar
Kjartan committed
222
223
224
225
226
227
  exit();
}

/**
 * Generates a 404 error if the request can not be handled.
 */
Dries's avatar
   
Dries committed
228
function drupal_not_found() {
Dries's avatar
   
Dries committed
229
  header('HTTP/1.0 404 Not Found');
Dries's avatar
   
Dries committed
230
  watchdog('httpd', t('404 error: %page not found.', array('%page' => '<em>'. check_query($_GET['q']) .'</em>')));
Dries's avatar
   
Dries committed
231
232

  $path = drupal_get_normal_path(variable_get('site_404', ''));
Dries's avatar
   
Dries committed
233
  $status = MENU_NOT_FOUND;
Dries's avatar
   
Dries committed
234
235
  if ($path) {
    menu_set_active_item($path);
Dries's avatar
   
Dries committed
236
    $status = menu_execute_active_handler();
Dries's avatar
   
Dries committed
237
238
  }

Dries's avatar
   
Dries committed
239
  if ($status != MENU_FOUND) {
Dries's avatar
Dries committed
240
    print theme('page', '', t('Page not found'));
Dries's avatar
   
Dries committed
241
242
  }
}
Dries's avatar
   
Dries committed
243

Dries's avatar
   
Dries committed
244
245
246
247
248
249
250
/**
 * Generates a 403 error if the request is not allowed.
 */
function drupal_access_denied() {
  header('HTTP/1.0 403 Forbidden');

  $path = drupal_get_normal_path(variable_get('site_403', ''));
Dries's avatar
   
Dries committed
251
  $status = MENU_NOT_FOUND;
Dries's avatar
   
Dries committed
252
253
254
255
256
257
258
259
260
261
  if ($path) {
    menu_set_active_item($path);
    $status = menu_execute_active_handler();
  }

  if ($status != MENU_FOUND) {
    print theme('page', message_access(), t('Access denied'));
  }
}

Dries's avatar
   
Dries committed
262
/**
Dries's avatar
   
Dries committed
263
 * Perform an HTTP request.
Dries's avatar
   
Dries committed
264
 *
Dries's avatar
   
Dries committed
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
 * This is a flexible and powerful HTTP client implementation. Correctly handles
 * GET, POST, PUT or any other HTTP requests. Handles redirects.
 *
 * @param $url
 *   A string containing a fully qualified URI.
 * @param $headers
 *   An array containing an HTTP header => value pair.
 * @param $method
 *   A string defining the HTTP request to use.
 * @param $data
 *   A string containing data to include in the request.
 * @param $retry
 *   An integer representing how many times to retry the request in case of a
 *   redirect.
 * @return
 *   An object containing the HTTP request headers, response code, headers,
 *   data, and redirect status.
Dries's avatar
   
Dries committed
282
283
 */
function drupal_http_request($url, $headers = array(), $method = 'GET', $data = NULL, $retry = 3) {
Dries's avatar
   
Dries committed
284
  // Parse the URL, and make sure we can handle the schema.
Dries's avatar
   
Dries committed
285
286
287
288
289
290
  $uri = parse_url($url);
  switch ($uri['scheme']) {
    case 'http':
      $fp = @fsockopen($uri['host'], ($uri['port'] ? $uri['port'] : 80), $errno, $errstr, 15);
      break;
    case 'https':
Dries's avatar
   
Dries committed
291
292
      // Note: Only works for PHP 4.3 compiled with OpenSSL.
      $fp = @fsockopen('ssl://'. $uri['host'], ($uri['port'] ? $uri['port'] : 443), $errno, $errstr, 20);
Dries's avatar
   
Dries committed
293
294
      break;
    default:
Dries's avatar
   
Dries committed
295
      $result->error = 'invalid schema '. $uri['scheme'];
Dries's avatar
   
Dries committed
296
297
298
      return $result;
  }

Dries's avatar
   
Dries committed
299
  // Make sure the socket opened properly.
Dries's avatar
   
Dries committed
300
  if (!$fp) {
Dries's avatar
   
Dries committed
301
    $result->error = trim($errno .' '. $errstr);
Dries's avatar
   
Dries committed
302
303
304
    return $result;
  }

Dries's avatar
   
Dries committed
305
  // Construct the path to act on.
Dries's avatar
   
Dries committed
306
307
  $path = $uri['path'] ? $uri['path'] : '/';
  if ($uri['query']) {
Dries's avatar
   
Dries committed
308
    $path .= '?'. $uri['query'];
Dries's avatar
   
Dries committed
309
310
  }

Dries's avatar
   
Dries committed
311
  // Create HTTP request.
Dries's avatar
   
Dries committed
312
  $defaults = array(
Dries's avatar
   
Dries committed
313
    'Host' => 'Host: '. $uri['host'],
314
315
    'User-Agent' => 'User-Agent: Drupal (+http://www.drupal.org/)',
    'Content-Length' => 'Content-Length: '. strlen($data)
Dries's avatar
   
Dries committed
316
317
318
  );

  foreach ($headers as $header => $value) {
Dries's avatar
   
Dries committed
319
    $defaults[$header] = $header .': '. $value;
Dries's avatar
   
Dries committed
320
321
  }

Dries's avatar
   
Dries committed
322
  $request = $method .' '. $path ." HTTP/1.0\r\n";
Dries's avatar
   
Dries committed
323
324
325
  $request .= implode("\r\n", $defaults);
  $request .= "\r\n\r\n";
  if ($data) {
Dries's avatar
   
Dries committed
326
    $request .= $data ."\r\n";
Dries's avatar
   
Dries committed
327
328
329
330
331
332
  }
  $result->request = $request;

  fwrite($fp, $request);

  // Fetch response.
333
  $response = '';
334
  while (!feof($fp) && $data = fread($fp, 1024)) {
335
    $response .= $data;
Dries's avatar
   
Dries committed
336
337
338
339
  }
  fclose($fp);

  // Parse response.
340
341
342
343
  list($headers, $result->data) = explode("\r\n\r\n", $response, 2);
  $headers = preg_split("/\r\n|\n|\r/", $headers);

  list($protocol, $code, $text) = explode(' ', trim(array_shift($headers)), 3);
Dries's avatar
   
Dries committed
344
345
346
  $result->headers = array();

  // Parse headers.
347
  while ($line = trim(array_shift($headers))) {
Dries's avatar
   
Dries committed
348
349
350
351
352
353
354
355
356
357
358
359
    list($header, $value) = explode(':', $line, 2);
    $result->headers[$header] = trim($value);
  }

  $responses = array(
    100 => 'Continue', 101 => 'Switching Protocols',
    200 => 'OK', 201 => 'Created', 202 => 'Accepted', 203 => 'Non-Authoritative Information', 204 => 'No Content', 205 => 'Reset Content', 206 => 'Partial Content',
    300 => 'Multiple Choices', 301 => 'Moved Permanently', 302 => 'Found', 303 => 'See Other', 304 => 'Not Modified', 305 => 'Use Proxy', 307 => 'Temporary Redirect',
    400 => 'Bad Request', 401 => 'Unauthorized', 402 => 'Payment Required', 403 => 'Forbidden', 404 => 'Not Found', 405 => 'Method Not Allowed', 406 => 'Not Acceptable', 407 => 'Proxy Authentication Required', 408 => 'Request Time-out', 409 => 'Conflict', 410 => 'Gone', 411 => 'Length Required', 412 => 'Precondition Failed', 413 => 'Request Entity Too Large', 414 => 'Request-URI Too Large', 415 => 'Unsupported Media Type', 416 => 'Requested range not satisfiable', 417 => 'Expectation Failed',
    500 => 'Internal Server Error', 501 => 'Not Implemented', 502 => 'Bad Gateway', 503 => 'Service Unavailable', 504 => 'Gateway Time-out', 505 => 'HTTP Version not supported'
  );
  // RFC 2616 states that all unknown HTTP codes must be treated the same as
Dries's avatar
   
Dries committed
360
  // the base code in their class.
Dries's avatar
   
Dries committed
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
  if (!isset($responses[$code])) {
    $code = floor($code / 100) * 100;
  }

  switch ($code) {
    case 200: // OK
    case 304: // Not modified
      break;
    case 301: // Moved permanently
    case 302: // Moved temporarily
    case 307: // Moved temporarily
      $location = $result->headers['Location'];

      if ($retry) {
        $result = drupal_http_request($result->headers['Location'], $headers, $method, $data, --$retry);
        $result->redirect_code = $result->code;
      }
      $result->redirect_url = $location;

      break;
    default:
      $result->error = $text;
  }

  $result->code = $code;
  return $result;
}
Dries's avatar
   
Dries committed
388
389
390
/**
 * @} End of "HTTP handling".
 */
Dries's avatar
   
Dries committed
391

Dries's avatar
   
Dries committed
392
/**
Dries's avatar
   
Dries committed
393
394
395
396
 * Log errors as defined by administrator
 * Error levels:
 *  1 = Log errors to database.
 *  2 = Log errors to database and to screen.
Dries's avatar
   
Dries committed
397
 */
Dries's avatar
   
Dries committed
398
function error_handler($errno, $message, $filename, $line, $variables) {
Dries's avatar
   
Dries committed
399
400
401
  if ($errno & E_ALL ^ E_NOTICE) {
    $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', 2048 => 'strict warning');
    $entry = $types[$errno] .': '. $message .' in '. $filename .' on line '. $line .'.';
Dries's avatar
   
Dries committed
402

403
    watchdog('error', t('%error: %message in %file on line %line.', array('%error' => $types[$errno], '%message' => $message, '%file' => $filename, '%line' => $line)));
Dries's avatar
   
Dries committed
404
405

    if (variable_get('error_level', 1) == 1) {
Dries's avatar
   
Dries committed
406
      print '<pre>'. $entry .'</pre>';
Dries's avatar
Dries committed
407
    }
Dries's avatar
   
Dries committed
408
409
410
  }
}

Dries's avatar
Dries committed
411
412
function _fix_gpc_magic(&$item, $key) {
  if (is_array($item)) {
Kjartan's avatar
Kjartan committed
413
414
415
    array_walk($item, '_fix_gpc_magic');
  }
  else {
Kjartan's avatar
Kjartan committed
416
    $item = stripslashes($item);
Dries's avatar
   
Dries committed
417
418
419
  }
}

Dries's avatar
   
Dries committed
420
421
422
423
/**
 * Correct double-escaping problems caused by "magic quotes" in some PHP
 * installations.
 */
Dries's avatar
   
Dries committed
424
425
function fix_gpc_magic() {
  static $fixed = false;
Dries's avatar
   
Dries committed
426
  if (!$fixed && ini_get('magic_quotes_gpc')) {
Dries's avatar
Dries committed
427
428
429
430
431
432
    array_walk($_GET, '_fix_gpc_magic');
    array_walk($_POST, '_fix_gpc_magic');
    array_walk($_COOKIE, '_fix_gpc_magic');
    array_walk($_REQUEST, '_fix_gpc_magic');
    $fixed = true;
  }
Dries's avatar
   
Dries committed
433
434
}

Kjartan's avatar
Kjartan committed
435
436
437
/**
 * @name Conversion
 * @{
Dries's avatar
   
Dries committed
438
 * Converts data structures to different types.
Kjartan's avatar
Kjartan committed
439
 */
Dries's avatar
   
Dries committed
440
441
442
443

/**
 * Convert an associative array to an anonymous object.
 */
Dries's avatar
Dries committed
444
445
function array2object($array) {
  if (is_array($array)) {
446
    $object = new stdClass();
Dries's avatar
Dries committed
447
    foreach ($array as $key => $value) {
Dries's avatar
   
Dries committed
448
449
450
451
      $object->$key = $value;
    }
  }
  else {
Dries's avatar
Dries committed
452
    $object = $array;
Dries's avatar
   
Dries committed
453
454
455
456
457
  }

  return $object;
}

Dries's avatar
   
Dries committed
458
459
460
/**
 * Convert an object to an associative array.
 */
Dries's avatar
Dries committed
461
462
463
function object2array($object) {
  if (is_object($object)) {
    foreach ($object as $key => $value) {
Dries's avatar
   
Dries committed
464
465
466
467
      $array[$key] = $value;
    }
  }
  else {
Dries's avatar
Dries committed
468
    $array = $object;
Dries's avatar
   
Dries committed
469
470
471
472
  }

  return $array;
}
Dries's avatar
   
Dries committed
473
474
475
476

/**
 * @} End of "Conversion".
 */
Dries's avatar
   
Dries committed
477

Kjartan's avatar
Kjartan committed
478
479
480
/**
 * @name Messages
 * @{
Dries's avatar
   
Dries committed
481
 * Frequently used messages.
Kjartan's avatar
Kjartan committed
482
 */
Dries's avatar
   
Dries committed
483
484
485
486
487
488
489

/**
 * Return a string with an "access denied" message.
 *
 * Always consider whether to use drupal_access_denied() instead to return a
 * proper (and customizable) 403 error.
 */
Dries's avatar
   
Dries committed
490
function message_access() {
Dries's avatar
   
Dries committed
491
  return t('You are not authorized to access this page.');
Dries's avatar
   
Dries committed
492
493
}

Dries's avatar
   
Dries committed
494
495
496
/**
 * Return a string with a "not applicable" message.
 */
Dries's avatar
   
Dries committed
497
function message_na() {
Dries's avatar
   
Dries committed
498
  return t('n/a');
Dries's avatar
   
Dries committed
499
500
}

Dries's avatar
   
Dries committed
501
502
503
/**
 * @} End of "Messages".
 */
Dries's avatar
   
Dries committed
504

Dries's avatar
   
Dries committed
505
506
507
/**
 * Initialize the localization system.
 */
Dries's avatar
   
Dries committed
508
509
function locale_initialize() {
  global $user;
Dries's avatar
   
Dries committed
510
511
512
513
514

  if (function_exists('i18n_get_lang')) {
    return i18n_get_lang();
  }

Dries's avatar
   
Dries committed
515
516
517
518
519
  if (function_exists('locale')) {
    $languages = locale_supported_languages();
    $languages = $languages['name'];
  }
  else {
520
521
522
    // Ensure the locale/language is correctly returned, even without locale.module.
    // Useful for e.g. XML/HTML 'lang' attributes.
    $languages = array('en' => 'English');
Dries's avatar
   
Dries committed
523
  }
Dries's avatar
   
Dries committed
524
525
526
527
528
529
  if ($user->uid && $languages[$user->language]) {
    return $user->language;
  }
  else {
    return key($languages);
  }
Dries's avatar
   
Dries committed
530
531
}

Kjartan's avatar
Kjartan committed
532
/**
Dries's avatar
   
Dries committed
533
 * Translate strings to the current locale.
Kjartan's avatar
Kjartan committed
534
 *
535
 * When using t(), try to put entire sentences and strings in one t() call.
Dries's avatar
   
Dries committed
536
537
538
539
 * This makes it easier for translators. HTML markup within translation strings
 * is acceptable, if necessary. The suggested syntax for a link embedded
 * within a translation string is:
 * @code
Dries's avatar
   
Dries committed
540
541
542
 *   $msg = t('You must log in below or <a href="%url">create a new
 *             account</a> before viewing the next page.', array('%url'
 *             => url('user/register')));
Dries's avatar
   
Dries committed
543
 * @endcode
544
545
546
 * We suggest the same syntax for links to other sites. This makes it easy to
 * change link URLs if needed (which happens often) without requiring updates
 * to translations.
Kjartan's avatar
Kjartan committed
547
 *
Dries's avatar
   
Dries committed
548
 * @param $string
Dries's avatar
   
Dries committed
549
 *   A string containing the English string to translate.
Dries's avatar
   
Dries committed
550
551
 * @param $args
 *   An associative array of replacements to make after translation. Incidences
Dries's avatar
   
Dries committed
552
 *   of any key in this array are replaced with the corresponding value.
Dries's avatar
   
Dries committed
553
554
 * @return
 *   The translated string.
Kjartan's avatar
Kjartan committed
555
 */
Dries's avatar
   
Dries committed
556
function t($string, $args = 0) {
Dries's avatar
   
Dries committed
557
558
559
560
  global $locale;
  if (function_exists('locale') && $locale != 'en') {
    $string = locale($string);
  }
561

Dries's avatar
   
Dries committed
562
563
  if (!$args) {
    return $string;
Kjartan's avatar
Kjartan committed
564
565
  }
  else {
Dries's avatar
   
Dries committed
566
567
    return strtr($string, $args);
  }
Dries's avatar
   
Dries committed
568
569
}

Dries's avatar
   
Dries committed
570
571
572
573
574
575
576
577
/**
 * Encode special characters in a string for display as HTML.
 *
 * Note that we'd like to use htmlspecialchars($input, $quotes, 'utf-8')
 * as outlined in the PHP manual, 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. This will be changed later once we make PHP 4.3 a requirement.
 */
Dries's avatar
   
Dries committed
578
function drupal_specialchars($input, $quotes = ENT_NOQUOTES) {
Dries's avatar
   
Dries committed
579
  return htmlspecialchars($input, $quotes);
Dries's avatar
   
Dries committed
580
581
}

Kjartan's avatar
Kjartan committed
582
/**
Dries's avatar
   
Dries committed
583
 * @defgroup validation Input validation
Dries's avatar
   
Dries committed
584
 * @{
Dries's avatar
   
Dries committed
585
 * Functions to validate user input.
Kjartan's avatar
Kjartan committed
586
587
 */

588
/**
Dries's avatar
   
Dries committed
589
590
591
 * Verify the syntax of the given e-mail address.
 *
 * Empty e-mail addresses are allowed. See RFC 2822 for details.
592
 *
Dries's avatar
   
Dries committed
593
594
 * @param $mail
 *   A string containing an email address.
Dries's avatar
   
Dries committed
595
 * @return
Dries's avatar
   
Dries committed
596
 *   TRUE if the address is in a valid format.
597
 */
Dries's avatar
   
Dries committed
598
function valid_email_address($mail) {
599
  $user = '[a-zA-Z0-9_\-\.\+\^!#\$%&*+\/\=\?\`\|\{\}~\']+';
600
  $domain = '(?:(?:[a-zA-Z0-9]|[a-zA-Z0-9][a-zA-Z0-9\-]*[a-zA-Z0-9])\.?)+';
601
602
603
  $ipv4 = '[0-9]{1,3}(\.[0-9]{1,3}){3}';
  $ipv6 = '[0-9a-fA-F]{1,4}(\:[0-9a-fA-F]{1,4}){7}';

Dries's avatar
Dries committed
604
  return preg_match("/^$user@($domain|(\[($ipv4|$ipv6)\]))$/", $mail);
605
606
}

Dries's avatar
   
Dries committed
607
608
609
/**
 * Verify the syntax of the given URL.
 *
Dries's avatar
   
Dries committed
610
 * @param $url
Dries's avatar
   
Dries committed
611
 *   The URL to verify.
Dries's avatar
   
Dries committed
612
 * @param $absolute
Dries's avatar
   
Dries committed
613
 *   Whether the URL is absolute (beginning with a scheme such as "http:").
Dries's avatar
   
Dries committed
614
 * @return
Dries's avatar
   
Dries committed
615
 *   TRUE if the URL is in a valid format.
Dries's avatar
   
Dries committed
616
 */
Dries's avatar
   
Dries committed
617
function valid_url($url, $absolute = FALSE) {
618
  if ($absolute) {
Dries's avatar
   
Dries committed
619
    return preg_match("/^(http|https|ftp):\/\/[a-z0-9\/:_\-_\.\?,~=#&%]+$/i", $url);
620
621
  }
  else {
622
    return preg_match("/^[a-z0-9\/:_\-_\.,]+$/i", $url);
623
  }
Dries's avatar
   
Dries committed
624
625
}

Dries's avatar
   
Dries committed
626
627
628
629
630
631
632
633
634
635
/**
 * Validate data input by a user.
 *
 * Ensures that user data cannot be used to perform attacks on the site.
 *
 * @param $data
 *   The input to check.
 * @return
 *   TRUE if the input data is acceptable.
 */
Kjartan's avatar
Kjartan committed
636
637
function valid_input_data($data) {
  if (is_array($data) || is_object($data)) {
Dries's avatar
   
Dries committed
638
    // Form data can contain a number of nested arrays.
Kjartan's avatar
Kjartan committed
639
    foreach ($data as $key => $value) {
Dries's avatar
   
Dries committed
640
      if (!valid_input_data($key) || !valid_input_data($value)) {
Dries's avatar
   
Dries committed
641
        return FALSE;
Kjartan's avatar
Kjartan committed
642
643
644
645
      }
    }
  }
  else {
Dries's avatar
   
Dries committed
646
    // Detect dangerous input data.
Kjartan's avatar
Kjartan committed
647

Dries's avatar
   
Dries committed
648
649
650
651
    // Check strings:
    $match  = preg_match('/\Wjavascript\s*:/i', $data);
    $match += preg_match('/\Wexpression\s*\(/i', $data);
    $match += preg_match('/\Walert\s*\(/i', $data);
Kjartan's avatar
Kjartan committed
652

Dries's avatar
   
Dries committed
653
    // Check attributes:
Kjartan's avatar
Kjartan committed
654
655
    $match += preg_match("/\W(dynsrc|datasrc|data|lowsrc|on[a-z]+)\s*=[^>]+?>/i", $data);

Dries's avatar
   
Dries committed
656
    // Check tags:
Kjartan's avatar
Kjartan committed
657
658
659
    $match += preg_match("/<\s*(applet|script|object|style|embed|form|blink|meta|html|frame|iframe|layer|ilayer|head|frameset|xml)/i", $data);

    if ($match) {
Dries's avatar
   
Dries committed
660
      watchdog('warning', t('Terminated request because of suspicious input data: %data.', array('%data' => '<em>'. drupal_specialchars($data) .'</em>')));
Dries's avatar
   
Dries committed
661
      return FALSE;
Kjartan's avatar
Kjartan committed
662
663
664
    }
  }

Dries's avatar
   
Dries committed
665
  return TRUE;
Kjartan's avatar
Kjartan committed
666
}
Dries's avatar
   
Dries committed
667
668
669
/**
 * @} End of "defgroup validation".
 */
Kjartan's avatar
Kjartan committed
670
671
672
673

/**
 * @defgroup search Search interface
 * @{
Dries's avatar
   
Dries committed
674
675
676
677
678
 * The Drupal search interface manages a global search mechanism.
 *
 * Modules may plug into this system to provide searches of different types of
 * data. Most of the system is handled by search.module, so this must be enabled
 * for all of the search features to work.
Kjartan's avatar
Kjartan committed
679
 */
Dries's avatar
   
Dries committed
680

Kjartan's avatar
Kjartan committed
681
/**
Dries's avatar
   
Dries committed
682
683
684
685
 * Format a single result entry of a search query.
 *
 * Modules may implement hook_search_item() in order to override this default
 * function to display search results.
Kjartan's avatar
Kjartan committed
686
 *
Dries's avatar
   
Dries committed
687
688
689
690
691
 * @param $item
 *   A single search result as returned by hook_search(). The result should be
 *   an array with keys "count", "link", "title", "user", "date", and "keywords".
 * @param $type
 *   The type of item found, such as "user" or "comment".
Kjartan's avatar
Kjartan committed
692
 */
Dries's avatar
   
Dries committed
693
function search_item($item, $type) {
Dries's avatar
   
Dries committed
694
695
  if (module_hook($type, 'search_item')) {
    $output = module_invoke($type, 'search_item', $item);
Dries's avatar
   
Dries committed
696
697
  }
  else {
Dries's avatar
   
Dries committed
698
699
    $output = ' <dt class="title"><a href="'. $item['link'] .'">'. $item['title'] .'</a></dt>';
    $output .= ' <dd class="small">' . t($type) . ($item['user'] ? ' - '. $item['user'] : '') .''. ($item['date'] ? ' - '. format_date($item['date'], 'small') : '') .'</dd>';
Dries's avatar
   
Dries committed
700
  }
Dries's avatar
   
Dries committed
701
702
703
704

  return $output;
}

Kjartan's avatar
Kjartan committed
705
706
707
/**
 * Render a generic search form.
 *
Dries's avatar
   
Dries committed
708
709
710
711
 * This form must be usable not only within "http://example.com/search", but also
 * as a simple search box (without "Restrict search to", help text, etc.), in the
 * theme's header, and so forth. This means we must provide options to
 * conditionally render certain parts of this form.
Kjartan's avatar
Kjartan committed
712
 *
Dries's avatar
   
Dries committed
713
714
715
716
717
718
719
720
721
 * @param $action
 *   Form action. Defaults to "search".
 * @param $keys
 *   The search string entered by the user, containing keywords for the search.
 * @param $options
 *   Whether to render the optional form fields and text ("Restrict search
 *   to", help text, etc.).
 * @return
 *   An HTML string containing the search form.
Kjartan's avatar
Kjartan committed
722
 */
Dries's avatar
   
Dries committed
723
function search_form($action = '', $keys = '', $options = FALSE) {
Dries's avatar
   
Dries committed
724
725
  $edit = $_POST['edit'];

Dries's avatar
   
Dries committed
726
  if (!$action) {
Dries's avatar
   
Dries committed
727
    $action = url('search');
Dries's avatar
   
Dries committed
728
729
  }

Dries's avatar
   
Dries committed
730
731
  $output = ' <div class="search-form"><br /><input type="text" class="form-text" size="50" value="'. check_form($keys) .'" name="keys" />';
  $output .= ' <input type="submit" class="form-submit" value="'. t('Search') ."\" />\n";
Dries's avatar
   
Dries committed
732

Dries's avatar
Dries committed
733
  if ($options) {
Dries's avatar
   
Dries committed
734
735
    $output .= '<br />';
    $output .= t('Restrict search to') .': ';
Dries's avatar
   
Dries committed
736
737

    foreach (module_list() as $name) {
Dries's avatar
   
Dries committed
738
739
      if (module_hook($name, 'search')) {
        $output .= ' <input type="checkbox" name="edit[type]['. $name .']" '. ($edit['type'][$name] ? ' checked="checked"' : '') .' /> '. t($name);
Dries's avatar
   
Dries committed
740
741
742
      }
    }
  }
743
  $output .= '</div>';
Dries's avatar
   
Dries committed
744

Dries's avatar
   
Dries committed
745
  return form($output, 'post', $action);
Dries's avatar
   
Dries committed
746
747
}

Dries's avatar
   
Dries committed
748
749
/**
 * Perform a global search on the given keys, and return the formatted results.
Kjartan's avatar
Kjartan committed
750
 */
Dries's avatar
   
Dries committed
751
function search_data($keys = NULL) {
Dries's avatar
   
Dries committed
752
  $edit = $_POST['edit'];
Dries's avatar
   
Dries committed
753
  $output = '';
Dries's avatar
   
Dries committed
754

Dries's avatar
   
Dries committed
755
  if (isset($keys)) {
Dries's avatar
   
Dries committed
756
    foreach (module_list() as $name) {
Dries's avatar
   
Dries committed
757
758
      if (module_hook($name, 'search') && (!$edit['type'] || $edit['type'][$name])) {
        list($title, $results) = module_invoke($name, 'search', $keys);
Dries's avatar
   
Dries committed
759
        if ($results) {
Dries's avatar
   
Dries committed
760
761
          $output .= '<h2>'. $title .'</h2>';
          $output .= '<dl class="search-results">';
Dries's avatar
   
Dries committed
762
763
764
          foreach ($results as $entry) {
            $output .= search_item($entry, $name);
          }
Dries's avatar
   
Dries committed
765
          $output .= '</dl>';
Dries's avatar
   
Dries committed
766
767
768
769
770
771
772
773
        }
      }
    }
  }

  return $output;
}

Kjartan's avatar
Kjartan committed
774
/**
Dries's avatar
   
Dries committed
775
 * Display a search form for a particular type of data.
Kjartan's avatar
Kjartan committed
776
 *
Dries's avatar
   
Dries committed
777
778
779
780
781
782
783
784
785
786
787
 * @param $type
 *   The type of content to search within.
 * @param $action
 *   Form action. Defaults to "search".
 * @param $keys
 *   The search string entered by the user, containing keywords for the search.
 * @param $options
 *   Whether to render the optional form fields and text ("Restrict search
 *   to", help text, etc.).
 * @return
 *   An HTML string containing the search form and results.
Kjartan's avatar
Kjartan committed
788
 */
Dries's avatar
   
Dries committed
789
function search_type($type, $action = '', $keys = '', $options = FALSE) {
Dries's avatar
   
Dries committed
790
  $_POST['edit']['type'][$type] = 'on';
Dries's avatar
   
Dries committed
791

Dries's avatar
   
Dries committed
792
  return search_form($action, $keys, $options) . '<br />'. search_data($keys);
Dries's avatar
   
Dries committed
793
}
794
795

/**
Dries's avatar
   
Dries committed
796
 * @} End of "defgroup search".
797
 */
Dries's avatar
   
Dries committed
798

Dries's avatar
   
Dries committed
799
function check_form($text) {
Dries's avatar
   
Dries committed
800
  return drupal_specialchars($text, ENT_QUOTES);
Dries's avatar
   
Dries committed
801
802
}

803
804
function check_file($filename) {
  return is_uploaded_file($filename);
Dries's avatar
   
Dries committed
805
806
}

Dries's avatar
   
Dries committed
807
/**
Dries's avatar
   
Dries committed
808
 * @defgroup format Formatting
Dries's avatar
   
Dries committed
809
 * @{
Dries's avatar
   
Dries committed
810
 * Functions to format numbers, strings, dates, etc.
Dries's avatar
   
Dries committed
811
812
 */

Dries's avatar
   
Dries committed
813
814
815
816
817
818
/**
 * Formats an RSS channel.
 *
 * Arbitrary elements may be added using the $args associative array.
 */
function format_rss_channel($title, $link, $description, $items, $language = 'en', $args = array()) {
Dries's avatar
   
Dries committed
819
820
  // arbitrary elements may be added using the $args associative array

Dries's avatar
Dries committed
821
  $output = "<channel>\n";
Dries's avatar
   
Dries committed
822
823
824
825
  $output .= ' <title>'. drupal_specialchars(strip_tags($title)) ."</title>\n";
  $output .= ' <link>'. drupal_specialchars(strip_tags($link)) ."</link>\n";
  $output .= ' <description>'. drupal_specialchars(strip_tags($description)) ."</description>\n";
  $output .= ' <language>'. drupal_specialchars(strip_tags($language)) ."</language>\n";
Dries's avatar
   
Dries committed
826
  foreach ($args as $key => $value) {
Dries's avatar
   
Dries committed
827
    $output .= ' <'. $key .'>'. drupal_specialchars(strip_tags($value)) ."</$key>\n";
Dries's avatar
   
Dries committed
828
  }
Dries's avatar
   
Dries committed
829
830
831
832
833
834
  $output .= $items;
  $output .= "</channel>\n";

  return $output;
}

Dries's avatar
   
Dries committed
835
836
837
838
839
/**
 * Format a single RSS item.
 *
 * Arbitrary elements may be added using the $args associative array.
 */
Dries's avatar
   
Dries committed
840
function format_rss_item($title, $link, $description, $args = array()) {
Dries's avatar
Dries committed
841
  $output = "<item>\n";
Dries's avatar
   
Dries committed
842
843
  $output .= ' <title>'. drupal_specialchars(strip_tags($title)) ."</title>\n";
  $output .= ' <link>'. drupal_specialchars(strip_tags($link)) ."</link>\n";
844
  $output .= ' <description>'. drupal_specialchars($description) ."</description>\n";
Dries's avatar
   
Dries committed
845
  foreach ($args as $key => $value) {
Dries's avatar
   
Dries committed
846
    $output .= ' <'. $key .'>'. drupal_specialchars(strip_tags($value)) ."</$key>\n";
Dries's avatar
   
Dries committed
847
  }
Dries's avatar
   
Dries committed
848
849
850
851
852
  $output .= "</item>\n";

  return $output;
}

Dries's avatar
   
Dries committed
853
/**
Dries's avatar
   
Dries committed
854
 * Format a string containing a count of items.
Dries's avatar
   
Dries committed
855
 *
Dries's avatar
   
Dries committed
856
857
858
859
860
861
862
863
864
865
866
867
868
869
 * This function ensures that the string is pluralized correctly. Since t() is
 * called by this function, 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 is clear this is
 *   singular, to ease translation (e.g. use "1 new comment" instead of "1 new").
 * @param $plural
 *   The string for the plural case. Please make sure it is clear this is plural,
 *   to ease translation. Use %count in place of the item count, as in "%count
 *   new comments".
 * @return
 *   A translated string.
Dries's avatar
   
Dries committed
870
 */
Dries's avatar
   
Dries committed
871
function format_plural($count, $singular, $plural) {
Dries's avatar
   
Dries committed
872
873
874
875
876
877
878
879
880
881
882
883
884
885
886
887
888
  if ($count == 1) return t($singular);

  // get the plural index through the gettext formula
  $index = (function_exists('locale')) ? locale_get_plural($count) : -1;
  if ($index < 0) { // backward compatibility
    return t($plural, array("%count" => $count));
  }
  else {
    switch ($index) {
      case "0":
        return t($singular);
      case "1":
        return t($plural, array("%count" => $count));
      default:
        return t(strtr($plural, array("%count" => '%count['. $index .']')), array('%count['. $index .']' => $count));
    }
  }
Dries's avatar
   
Dries committed
889
890
}

Dries's avatar
   
Dries committed
891
/**
Dries's avatar
   
Dries committed
892
 * Generate a string representation for the given byte count.
Dries's avatar
   
Dries committed
893
 *
Dries's avatar
   
Dries committed
894
895
896
897
 * @param $size
 *   The size in bytes.
 * @return
 *   A translated string representation of the size.
Dries's avatar
   
Dries committed
898
 */
Dries's avatar
   
Dries committed
899
function format_size($size) {
Dries's avatar
   
Dries committed
900
  $suffix = t('bytes');
Dries's avatar
   
Dries committed
901
902
  if ($size > 1024) {
    $size = round($size / 1024, 2);
Dries's avatar
   
Dries committed
903
    $suffix = t('KB');
Dries's avatar
   
Dries committed
904
905
906
  }
  if ($size > 1024) {
    $size = round($size / 1024, 2);
Dries's avatar
   
Dries committed
907
    $suffix = t('MB');
Dries's avatar
   
Dries committed
908
  }
Dries's avatar
   
Dries committed
909
  return t('%size %suffix', array('%size' => $size, '%suffix' => $suffix));
Dries's avatar
   
Dries committed
910
911
}

Dries's avatar
   
Dries committed
912
/**
Dries's avatar
   
Dries committed
913
 * Format a time interval with the requested granularity.
Dries's avatar
   
Dries committed
914
 *
Dries's avatar
   
Dries committed
915
916
917
918
919
920
 * @param $timestamp
 *   The length of the interval in seconds.
 * @param $granularity
 *   How many different units to display in the string.
 * @return
 *   A translated string representation of the interval.
Dries's avatar
   
Dries committed
921
 */
Dries's avatar
   
Dries committed
922
function format_interval($timestamp, $granularity = 2) {
Dries's avatar
   
Dries committed
923
  $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);
Dries's avatar
   
Dries committed
924
  $output = '';
Dries's avatar
   
Dries committed
925
  foreach ($units as $key => $value) {
Dries's avatar
   
Dries committed
926
    $key = explode('|', $key);
Dries's avatar
   
Dries committed
927
    if ($timestamp >= $value) {
Dries's avatar
   
Dries committed
928
      $output .= ($output ? ' ' : '') . format_plural(floor($timestamp / $value), $key[0], $key[1]);
Dries's avatar
   
Dries committed
929
      $timestamp %= $value;
Dries's avatar
   
Dries committed
930
931
932
933
934
      $granularity--;
    }

    if ($granularity == 0) {
      break;
Dries's avatar
   
Dries committed
935
936
    }
  }
Dries's avatar
   
Dries committed
937
  return $output ? $output : t('0 sec');
Dries's avatar
   
Dries committed
938
939
}

Dries's avatar
   
Dries committed
940
/**
Dries's avatar
   
Dries committed
941
942
 * Format a date with the given configured format or a custom format string.
 *
Dries's avatar
   
Dries committed
943
944
945
946
 * Drupal allows administrators to select formatting strings for 'small',
 * 'medium' and 'large' date formats. This function can handle these formats,
 * as well as any custom format.
 *
Dries's avatar
   
Dries committed
947
948
949
950
951
952
953
954
955
956
957
 * @param $timestamp
 *   The exact date to format, as a UNIX timestamp.
 * @param $type
 *   The format to use. Can be "small", "medium" or "large" for the preconfigured
 *   date formats. If "custom" is specified, then $format is required as well.
 * @param $format
 *   A PHP date format string as required by date().
 * @param $timezone
 *   Time zone offset in seconds; if omitted, the user's time zone is used.
 * @return
 *   A translated date string in the requested format.
Dries's avatar
   
Dries committed
958
 */
959
960
961
function format_date($timestamp, $type = 'medium', $format = '', $timezone = NULL) {
  if ($timezone === NULL) {
    global $user;
Steven Wittens's avatar
Steven Wittens committed
962
963
964
965
966
967
    if (variable_get('configurable_timezones', 1) && $user->uid && strlen($user->timezone)) {
      $timezone = $user->timezone;
    }
    else {
      $timezone = variable_get('date_default_timezone', 0);
    }
968
  }
Dries's avatar
   
Dries committed
969

970
  $timestamp += $timezone;
Dries's avatar
   
Dries committed
971
972

  switch ($type) {
973
974
    case 'small':
      $format = variable_get('date_format_short', 'm/d/Y - H:i');
Dries's avatar
   
Dries committed
975
      break;
976
977
    case 'large':
      $format = variable_get('date_format_long', 'l, F j, Y - H:i');
Dries's avatar
   
Dries committed
978
      break;
979
    case 'custom':
Dries's avatar
   
Dries committed
980
      // No change to format
Dries's avatar
   
Dries committed
981
      break;
982
    case 'medium':
Dries's avatar
   
Dries committed
983
    default:
984
      $format = variable_get('date_format_medium', 'D, m/d/Y - H:i');
Dries's avatar
   
Dries committed
985
986
  }

987
  $max = strlen($format);
Dries's avatar
   
Dries committed
988
  $date = '';
Dries's avatar
   
Dries committed
989
990
  for ($i = 0; $i < $max; $i++) {
    $c = $format{$i};
991
    if (strpos('AaDFlM', $c) !== false) {
992
      $date .= t(gmdate($c, $timestamp));
993
    }
994
    else if (strpos('BdgGhHiIjLmnsStTUwWYyz', $c) !== false) {
995
996
997
998
      $date .= gmdate($c, $timestamp);
    }
    else if ($c == 'r') {
      $date .= format_date($timestamp - $timezone, 'custom', 'D, d M Y H:i:s O', $timezone);
Dries's avatar
   
Dries committed
999
    }
1000
1001
1002
1003
1004
    else if ($c == 'O') {
      $date .= sprintf('%s%02d%02d', ($timezone < 0 ? '-' : '+'), abs($timezone / 3600), abs($timezone % 3600) / 60);
    }
    else if ($c == 'Z') {
      $date .= $timezone;
Dries's avatar
   
Dries committed
1005
1006
    }
    else {
1007
      $date .= $c;
Dries's avatar
   
Dries committed
1008
    }
Dries's avatar
   
Dries committed
1009
  }
1010

Dries's avatar
   
Dries committed
1011
1012
1013
  return $date;
}

Dries's avatar
   
Dries committed
1014
/**
Dries's avatar
   
Dries committed
1015
 * Format a username.
Dries's avatar
   
Dries committed
1016
 *
Dries's avatar
   
Dries committed
1017
1018
1019
1020
1021
 * @param $object
 *   The user object to format, usually returned from user_load().
 * @return
 *   A string containing an HTML link to the user's page if the passed object
 *   suggests that this is a site user. Otherwise, only the username is returned.
Dries's avatar
   
Dries committed
1022
 */
Dries's avatar
   
Dries committed
1023
1024
1025
function format_name($object) {

  if ($object->uid && $object->name) {
Dries's avatar
   
Dries committed
1026
    // Shorten the name when it is too long or it will break many tables.
Dries's avatar
Dries committed
1027
    if (strlen($object->name) > 20) {
Dries's avatar
   
Dries committed
1028
      $name = truncate_utf8($object->name, 15) .'...';
Dries's avatar
Dries committed
1029
1030
1031
1032
1033
    }
    else {
      $name = $object->name;
    }

Dries's avatar
   
Dries committed
1034
    $output = l($name, 'user/'. $object->uid, array('title' => t('View user profile.')));
Dries's avatar
   
Dries committed
1035
  }
Dries's avatar
   
Dries committed
1036
  else if ($object->name) {
Dries's avatar
   
Dries committed
1037
1038
1039
1040
    // Sometimes modules display content composed by people who are
    // not registered members of the site (e.g. mailing list or news
    // aggregator modules). This clause enables modules to display
    // the true author of the content.
Dries's avatar
   
Dries committed
1041
    if ($object->homepage) {
Dries's avatar
   
Dries committed
1042
      $output = '<a href="'. $object->homepage .'">'. $object->name .'</a>';
Dries's avatar
   
Dries committed
1043
1044
1045
1046
1047
1048
    }
    else {
      $output = $object->name;
    }

    $output .= ' ('. t('not verified') .')';
Dries's avatar
   
Dries committed
1049
  }
Dries's avatar
   
Dries committed
1050
  else {
Dries's avatar
   
Dries committed
1051
    $output = t(variable_get('anonymous', 'Anonymous'));
Dries's avatar
   
Dries committed
1052
1053
  }

Dries's avatar
   
Dries committed
1054
  return $output;
Dries's avatar
   
Dries committed
1055
}
Dries's avatar
   
Dries committed
1056
1057
1058
/**
 * @} End of "defgroup format".
 */
Dries's avatar
   
Dries committed
1059

Kjartan's avatar
Kjartan committed
1060
/**
Dries's avatar
   
Dries committed
1061
 * @defgroup form Form generation
Kjartan's avatar
Kjartan committed
1062
 * @{