bootstrap.inc 120 KB
Newer Older
1
<?php
Dries's avatar
 
Dries committed
2

3
use Drupal\Component\Utility\NestedArray;
4
use Drupal\Component\Utility\Settings;
5
use Drupal\Core\DrupalKernel;
6
use Drupal\Core\Database\Database;
7
use Drupal\Core\DependencyInjection\ContainerBuilder;
8 9
use Symfony\Component\ClassLoader\UniversalClassLoader;
use Symfony\Component\ClassLoader\ApcUniversalClassLoader;
10
use Symfony\Component\DependencyInjection\ContainerInterface;
11
use Symfony\Component\DependencyInjection\Container;
katbailey's avatar
katbailey committed
12
use Symfony\Component\DependencyInjection\Reference;
13
use Symfony\Component\DependencyInjection\Exception\RuntimeException as DependencyInjectionRuntimeException;
14
use Symfony\Component\HttpFoundation\Request;
15
use Drupal\Core\Language\Language;
16 17
use Drupal\Core\Lock\DatabaseLockBackend;
use Drupal\Core\Lock\LockBackendInterface;
18

Dries's avatar
 
Dries committed
19 20 21 22
/**
 * @file
 * Functions that need to be loaded on every Drupal request.
 */
Dries's avatar
 
Dries committed
23

24 25 26
/**
 * The current system version.
 */
27
const VERSION = '8.0-dev';
28 29 30 31

/**
 * Core API compatibility.
 */
32
const DRUPAL_CORE_COMPATIBILITY = '8.x';
33 34 35 36

/**
 * Minimum supported version of PHP.
 */
37
const DRUPAL_MINIMUM_PHP = '5.3.5';
38 39 40 41

/**
 * Minimum recommended value of PHP memory_limit.
 */
42
const DRUPAL_MINIMUM_PHP_MEMORY_LIMIT = '32M';
43

44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63
/**
 * Error reporting level: display no errors.
 */
const ERROR_REPORTING_HIDE = 'hide';

/**
 * Error reporting level: display errors and warnings.
 */
const ERROR_REPORTING_DISPLAY_SOME = 'some';

/**
 * Error reporting level: display all messages.
 */
const ERROR_REPORTING_DISPLAY_ALL = 'all';

/**
 * Error reporting level: display all messages, plus backtrace information.
 */
const ERROR_REPORTING_DISPLAY_VERBOSE = 'verbose';

64 65 66 67 68 69
/**
 * @defgroup logging_severity_levels Logging severity levels
 * @{
 * Logging severity levels as defined in RFC 3164.
 *
 * The WATCHDOG_* constant definitions correspond to the logging severity levels
70
 * defined in RFC 3164, section 4.1.1. PHP supplies predefined LOG_* constants
71
 * for use in the syslog() function, but their values on Windows builds do not
72
 * correspond to RFC 3164. The associated PHP bug report was closed with the
73 74 75 76 77 78 79 80 81 82 83 84 85 86
 * comment, "And it's also not a bug, as Windows just have less log levels,"
 * and "So the behavior you're seeing is perfectly normal."
 *
 * @see http://www.faqs.org/rfcs/rfc3164.html
 * @see http://bugs.php.net/bug.php?id=18090
 * @see http://php.net/manual/function.syslog.php
 * @see http://php.net/manual/network.constants.php
 * @see watchdog()
 * @see watchdog_severity_levels()
 */

/**
 * Log message severity -- Emergency: system is unusable.
 */
87
const WATCHDOG_EMERGENCY = 0;
88 89 90 91

/**
 * Log message severity -- Alert: action must be taken immediately.
 */
92
const WATCHDOG_ALERT = 1;
93 94

/**
95
 * Log message severity -- Critical conditions.
96
 */
97
const WATCHDOG_CRITICAL = 2;
98 99

/**
100
 * Log message severity -- Error conditions.
101
 */
102
const WATCHDOG_ERROR = 3;
103 104

/**
105
 * Log message severity -- Warning conditions.
106
 */
107
const WATCHDOG_WARNING = 4;
108 109

/**
110
 * Log message severity -- Normal but significant conditions.
111
 */
112
const WATCHDOG_NOTICE = 5;
113 114

/**
115
 * Log message severity -- Informational messages.
116
 */
117
const WATCHDOG_INFO = 6;
118 119

/**
120
 * Log message severity -- Debug-level messages.
121
 */
122
const WATCHDOG_DEBUG = 7;
123 124 125 126 127

/**
 * @} End of "defgroup logging_severity_levels".
 */

128 129 130
/**
 * First bootstrap phase: initialize configuration.
 */
131
const DRUPAL_BOOTSTRAP_CONFIGURATION = 0;
132 133

/**
134
 * Second bootstrap phase, initalize a kernel.
135
 */
136
const DRUPAL_BOOTSTRAP_KERNEL = 1;
137 138

/**
139
 * Third bootstrap phase: try to serve a cached page.
140
 */
141
const DRUPAL_BOOTSTRAP_PAGE_CACHE = 2;
142 143

/**
144
 * Fourth bootstrap phase: initialize database layer.
145
 */
146
const DRUPAL_BOOTSTRAP_DATABASE = 3;
147 148

/**
149
 * Fifth bootstrap phase: initialize the variable system.
150
 */
151
const DRUPAL_BOOTSTRAP_VARIABLES = 4;
152 153

/**
154
 * Sixth bootstrap phase: initialize session handling.
155
 */
156
const DRUPAL_BOOTSTRAP_SESSION = 5;
157 158

/**
159
 * Seventh bootstrap phase: set up the page header.
160
 */
161 162 163 164 165 166
const DRUPAL_BOOTSTRAP_PAGE_HEADER = 6;

/**
 * Eighth bootstrap phase: load code for subsystems and modules.
 */
const DRUPAL_BOOTSTRAP_CODE = 7;
167 168

/**
169
 * Final bootstrap phase: initialize language, path, theme, and modules.
170
 */
171
const DRUPAL_BOOTSTRAP_FULL = 8;
172

173 174 175
/**
 * Role ID for anonymous users; should match what's in the "role" table.
 */
176
const DRUPAL_ANONYMOUS_RID = 'anonymous';
177 178 179 180

/**
 * Role ID for authenticated users; should match what's in the "role" table.
 */
181
const DRUPAL_AUTHENTICATED_RID = 'authenticated';
182

183
/**
184 185 186
 * The number of bytes in a kilobyte.
 *
 * For more information, visit http://en.wikipedia.org/wiki/Kilobyte.
187
 */
188
const DRUPAL_KILOBYTE = 1024;
189

190
/**
191
 * Special system language code (only applicable to UI language).
192
 *
193 194 195 196
 * Refers to the language used in Drupal and module/theme source code. Drupal
 * uses the built-in text for English by default, but if configured to allow
 * translation/customization of English, we need to differentiate between the
 * built-in language and the English translation.
197
 */
198
const LANGUAGE_SYSTEM = 'system';
199

200
/**
201
 * The language code used when no language is explicitly assigned (yet).
202
 *
203 204 205 206 207 208 209 210 211 212 213 214 215 216 217 218 219 220
 * Should be used when language information is not available or cannot be
 * determined. This special language code is useful when we know the data
 * might have linguistic information, but we don't know the language.
 *
 * See http://www.w3.org/International/questions/qa-no-language#undetermined.
 */
const LANGUAGE_NOT_SPECIFIED = 'und';

/**
 * The language code used when the marked object has no linguistic content.
 *
 * Should be used when we explicitly know that the data referred has no
 * linguistic content.
 *
 * See http://www.w3.org/International/questions/qa-no-language#nonlinguistic.
 */
const LANGUAGE_NOT_APPLICABLE = 'zxx';

221 222 223 224 225 226 227 228
/**
 * Language code referring to the default language of data, e.g. of an entity.
 *
 * @todo: Change value to differ from LANGUAGE_NOT_SPECIFIED once field API
 * leverages the property API.
 */
const LANGUAGE_DEFAULT = 'und';

229
/**
230
 * The language state when referring to configurable languages.
231
 */
232 233 234 235 236 237 238 239 240 241 242
const LANGUAGE_CONFIGURABLE = 1;

/**
 * The language state when referring to locked languages.
 */
const LANGUAGE_LOCKED = 2;

/**
 * The language state used when referring to all languages.
 */
const LANGUAGE_ALL = 3;
243

244 245 246 247 248
/**
 * The language state used when referring to the site's default language.
 */
const LANGUAGE_SITE_DEFAULT = 4;

249
/**
250
 * The type of language used to define the content language.
251
 */
252
const LANGUAGE_TYPE_CONTENT = 'language_content';
253 254

/**
255
 * The type of language used to select the user interface.
256
 */
257
const LANGUAGE_TYPE_INTERFACE = 'language_interface';
258 259

/**
260
 * The type of language used for URLs.
261
 */
262
const LANGUAGE_TYPE_URL = 'language_url';
263

264 265 266
/**
 * Language written left to right. Possible value of $language->direction.
 */
267
const LANGUAGE_LTR = 0;
268 269 270 271

/**
 * Language written right to left. Possible value of $language->direction.
 */
272
const LANGUAGE_RTL = 1;
273

Dave Reid's avatar
Dave Reid committed
274 275 276 277 278 279 280 281 282 283 284 285 286 287 288 289
/**
 * Indicates an error during check for PHP unicode support.
 */
const UNICODE_ERROR = -1;

/**
 * Indicates that standard PHP (emulated) unicode support is being used.
 */
const UNICODE_SINGLEBYTE = 0;

/**
 * Indicates that full unicode support with the PHP mbstring extension is being
 * used.
 */
const UNICODE_MULTIBYTE = 1;

290
/**
291
 * Time of the current request in seconds elapsed since the Unix Epoch.
292
 *
293 294 295 296 297 298
 * This differs from $_SERVER['REQUEST_TIME'], which is stored as a float
 * since PHP 5.4.0. Float timestamps confuse most PHP functions
 * (including date_create()).
 *
 * @see http://php.net/manual/reserved.variables.server.php
 * @see http://php.net/manual/function.time.php
299
 */
300
define('REQUEST_TIME', (int) $_SERVER['REQUEST_TIME']);
301

302 303 304
/**
 * Flag for drupal_set_title(); text is not sanitized, so run check_plain().
 */
305
const CHECK_PLAIN = 0;
306 307 308 309

/**
 * Flag for drupal_set_title(); text has already been sanitized.
 */
310
const PASS_THROUGH = -1;
311

312 313 314
/**
 * Regular expression to match PHP function names.
 *
315
 * @see http://php.net/manual/language.functions.php
316
 */
317
const DRUPAL_PHP_FUNCTION_PATTERN = '[a-zA-Z_\x7f-\xff][a-zA-Z0-9_\x7f-\xff]*';
318

319 320 321
/**
 * $config_directories key for active directory.
 *
322
 * @see config_get_config_directory()
323 324 325 326 327 328
 */
const CONFIG_ACTIVE_DIRECTORY = 'active';

/**
 * $config_directories key for staging directory.
 *
329
 * @see config_get_config_directory()
330 331 332
 */
const CONFIG_STAGING_DIRECTORY = 'staging';

Dries's avatar
 
Dries committed
333
/**
334 335 336 337
 * Starts the timer with the specified name.
 *
 * If you start and stop the same timer multiple times, the measured intervals
 * will be accumulated.
Dries's avatar
 
Dries committed
338
 *
339
 * @param $name
Dries's avatar
 
Dries committed
340 341 342 343 344
 *   The name of the timer.
 */
function timer_start($name) {
  global $timers;

345
  $timers[$name]['start'] = microtime(TRUE);
346
  $timers[$name]['count'] = isset($timers[$name]['count']) ? ++$timers[$name]['count'] : 1;
Dries's avatar
 
Dries committed
347 348 349
}

/**
350
 * Reads the current timer value without stopping the timer.
Dries's avatar
 
Dries committed
351
 *
352
 * @param $name
Dries's avatar
 
Dries committed
353
 *   The name of the timer.
354
 *
Dries's avatar
 
Dries committed
355 356 357 358 359 360
 * @return
 *   The current timer value in ms.
 */
function timer_read($name) {
  global $timers;

361
  if (isset($timers[$name]['start'])) {
362
    $stop = microtime(TRUE);
363
    $diff = round(($stop - $timers[$name]['start']) * 1000, 2);
Dries's avatar
 
Dries committed
364

365 366 367 368
    if (isset($timers[$name]['time'])) {
      $diff += $timers[$name]['time'];
    }
    return $diff;
369
  }
370
  return $timers[$name]['time'];
Dries's avatar
 
Dries committed
371 372 373
}

/**
374
 * Stops the timer with the specified name.
Dries's avatar
 
Dries committed
375
 *
376
 * @param $name
Dries's avatar
 
Dries committed
377
 *   The name of the timer.
378
 *
Dries's avatar
 
Dries committed
379
 * @return
380 381
 *   A timer array. The array contains the number of times the timer has been
 *   started and stopped (count) and the accumulated timer value in ms (time).
Dries's avatar
 
Dries committed
382 383 384 385
 */
function timer_stop($name) {
  global $timers;

386 387 388 389 390 391 392 393 394 395
  if (isset($timers[$name]['start'])) {
    $stop = microtime(TRUE);
    $diff = round(($stop - $timers[$name]['start']) * 1000, 2);
    if (isset($timers[$name]['time'])) {
      $timers[$name]['time'] += $diff;
    }
    else {
      $timers[$name]['time'] = $diff;
    }
    unset($timers[$name]['start']);
396
  }
Dries's avatar
 
Dries committed
397 398 399

  return $timers[$name];
}
400

Dries's avatar
 
Dries committed
401
/**
402
 * Returns the appropriate configuration directory.
Dries's avatar
 
Dries committed
403
 *
404 405 406 407
 * Returns the configuration path based on the site's hostname, port, and
 * pathname. Uses find_conf_path() to find the current configuration directory.
 * See default.settings.php for examples on how the URL is converted to a
 * directory.
408
 *
409
 * @param bool $require_settings
410 411 412 413
 *   Only configuration directories with an existing settings.php file
 *   will be recognized. Defaults to TRUE. During initial installation,
 *   this is set to FALSE so that Drupal can detect a matching directory,
 *   then create a new settings.php file in it.
414
 * @param bool $reset
415
 *   Force a full search for matching directories even if one had been
416 417
 *   found previously. Defaults to FALSE.
 *
418 419
 * @return
 *   The path of the matching directory.
420 421
 *
 * @see default.settings.php
Dries's avatar
 
Dries committed
422
 */
423
function conf_path($require_settings = TRUE, $reset = FALSE) {
424
  $conf = &drupal_static(__FUNCTION__, '');
Dries's avatar
 
Dries committed
425

426
  if ($conf && !$reset) {
Dries's avatar
Dries committed
427 428
    return $conf;
  }
Dries's avatar
 
Dries committed
429

430 431 432 433 434
  $script_name = $_SERVER['SCRIPT_NAME'];
  if (!$script_name) {
    $script_name = $_SERVER['SCRIPT_FILENAME'];
  }
  $http_host = $_SERVER['HTTP_HOST'];
435
  $conf = find_conf_path($http_host, $script_name, $require_settings);
436 437 438 439 440 441
  return $conf;
}

/**
 * Finds the appropriate configuration directory for a given host and path.
 *
442 443 444 445 446 447 448 449 450 451 452 453 454 455 456 457 458 459 460 461 462
 * Finds a matching configuration directory file by stripping the website's
 * hostname from left to right and pathname from right to left. By default,
 * the directory must contain a 'settings.php' file for it to match. If the
 * parameter $require_settings is set to FALSE, then a directory without a
 * 'settings.php' file will match as well. The first configuration
 * file found will be used and the remaining ones will be ignored. If no
 * configuration file is found, returns a default value '$confdir/default'. See
 * default.settings.php for examples on how the URL is converted to a directory.
 *
 * If a file named sites.php is present in the $confdir, it will be loaded
 * prior to scanning for directories. That file can define aliases in an
 * associative array named $sites. The array is written in the format
 * '<port>.<domain>.<path>' => 'directory'. As an example, to create a
 * directory alias for http://www.drupal.org:8080/mysite/test whose configuration
 * file is in sites/example.com, the array should be defined as:
 * @code
 * $sites = array(
 *   '8080.www.drupal.org.mysite.test' => 'example.com',
 * );
 * @endcode
 *
463 464 465 466
 * @param $http_host
 *   The hostname and optional port number, e.g. "www.example.com" or
 *   "www.example.com:8080".
 * @param $script_name
467
 *   The part of the URL following the hostname, including the leading slash.
468 469 470
 * @param $require_settings
 *   Defaults to TRUE. If TRUE, then only match directories with a
 *   'settings.php' file. Otherwise match any directory.
471 472 473 474
 *
 * @return
 *   The path of the matching configuration directory.
 *
475 476
 * @see default.settings.php
 * @see example.sites.php
477 478 479
 * @see conf_path()
 */
function find_conf_path($http_host, $script_name, $require_settings = TRUE) {
480 481 482 483
  // Determine whether multi-site functionality is enabled.
  if (!file_exists(DRUPAL_ROOT . '/sites/sites.php')) {
    return 'sites/default';
  }
484 485

  $sites = array();
486
  include DRUPAL_ROOT . '/sites/sites.php';
487

488 489
  $uri = explode('/', $script_name);
  $server = explode('.', implode('.', array_reverse(explode(':', rtrim($http_host, '.')))));
Dries's avatar
Dries committed
490 491 492
  for ($i = count($uri) - 1; $i > 0; $i--) {
    for ($j = count($server); $j > 0; $j--) {
      $dir = implode('.', array_slice($server, -$j)) . implode('.', array_slice($uri, 0, $i));
493
      if (isset($sites[$dir]) && file_exists(DRUPAL_ROOT . '/sites/' . $sites[$dir])) {
494 495
        $dir = $sites[$dir];
      }
496 497
      if (file_exists(DRUPAL_ROOT . '/sites/' . $dir . '/settings.php') || (!$require_settings && file_exists(DRUPAL_ROOT . '/sites/' . $dir))) {
        return "sites/$dir";
Dries's avatar
Dries committed
498
      }
Dries's avatar
 
Dries committed
499 500
    }
  }
501
  return 'sites/default';
Dries's avatar
 
Dries committed
502 503
}

504
/**
505 506 507 508 509
 * Returns the path of a configuration directory.
 *
 * @param string $type
 *   (optional) The type of config directory to return. Drupal core provides
 *   'active' and 'staging'. Defaults to CONFIG_ACTIVE_DIRECTORY.
510 511 512 513
 *
 * @return string
 *   The configuration directory path.
 */
514 515
function config_get_config_directory($type = CONFIG_ACTIVE_DIRECTORY) {
  global $config_directories;
516 517 518

  if ($test_prefix = drupal_valid_test_ua()) {
    // @see Drupal\simpletest\WebTestBase::setUp()
519 520 521
    $path = conf_path() . '/files/simpletest/' . substr($test_prefix, 10) . '/config_' . $type;
  }
  elseif (!empty($config_directories[$type])) {
522 523 524 525 526 527 528
    // Allow a configuration directory path to be outside of webroot.
    if (empty($config_directories[$type]['absolute'])) {
      $path = conf_path() . '/files/' . $config_directories[$type]['path'];
    }
    else {
      $path = $config_directories[$type]['path'];
    }
529 530
  }
  else {
531
    throw new Exception(format_string('The configuration directory type %type does not exist.', array('%type' => $type)));
532 533 534 535
  }
  return $path;
}

536
/**
537
 * Sets appropriate server variables needed for command line scripts to work.
538 539 540 541 542 543 544 545 546 547 548 549 550 551 552 553 554 555 556 557 558 559 560 561 562 563 564 565 566 567 568 569 570
 *
 * This function can be called by command line scripts before bootstrapping
 * Drupal, to ensure that the page loads with the desired server parameters.
 * This is because many parts of Drupal assume that they are running in a web
 * browser and therefore use information from the global PHP $_SERVER variable
 * that does not get set when Drupal is run from the command line.
 *
 * In many cases, the default way in which this function populates the $_SERVER
 * variable is sufficient, and it can therefore be called without passing in
 * any input. However, command line scripts running on a multisite installation
 * (or on any installation that has settings.php stored somewhere other than
 * the sites/default folder) need to pass in the URL of the site to allow
 * Drupal to detect the correct location of the settings.php file. Passing in
 * the 'url' parameter is also required for functions like request_uri() to
 * return the expected values.
 *
 * Most other parameters do not need to be passed in, but may be necessary in
 * some cases; for example, if Drupal's ip_address() function needs to return
 * anything but the standard localhost value ('127.0.0.1'), the command line
 * script should pass in the desired value via the 'REMOTE_ADDR' key.
 *
 * @param $variables
 *   (optional) An associative array of variables within $_SERVER that should
 *   be replaced. If the special element 'url' is provided in this array, it
 *   will be used to populate some of the server defaults; it should be set to
 *   the URL of the current page request, excluding any $_GET request but
 *   including the script name (e.g., http://www.example.com/mysite/index.php).
 *
 * @see conf_path()
 * @see request_uri()
 * @see ip_address()
 */
function drupal_override_server_variables($variables = array()) {
571
  // Allow the provided URL to override any existing values in $_SERVER.
572 573
  if (isset($variables['url'])) {
    $url = parse_url($variables['url']);
574 575 576 577 578 579
    if (isset($url['host'])) {
      $_SERVER['HTTP_HOST'] = $url['host'];
    }
    if (isset($url['path'])) {
      $_SERVER['SCRIPT_NAME'] = $url['path'];
    }
580 581
    unset($variables['url']);
  }
582 583 584
  // Define default values for $_SERVER keys. These will be used if $_SERVER
  // does not already define them and no other values are passed in to this
  // function.
585
  $defaults = array(
586 587
    'HTTP_HOST' => 'localhost',
    'SCRIPT_NAME' => NULL,
588 589 590
    'REMOTE_ADDR' => '127.0.0.1',
    'REQUEST_METHOD' => 'GET',
    'SERVER_NAME' => NULL,
591
    'SERVER_SOFTWARE' => NULL,
592 593 594 595 596 597
    'HTTP_USER_AGENT' => NULL,
  );
  // Replace elements of the $_SERVER array, as appropriate.
  $_SERVER = $variables + $_SERVER + $defaults;
}

598
/**
599
 * Initializes the PHP environment.
600
 */
601
function drupal_environment_initialize() {
602 603
  if (!isset($_SERVER['HTTP_REFERER'])) {
    $_SERVER['HTTP_REFERER'] = '';
604
  }
605 606 607
  if (!isset($_SERVER['SERVER_PROTOCOL']) || ($_SERVER['SERVER_PROTOCOL'] != 'HTTP/1.0' && $_SERVER['SERVER_PROTOCOL'] != 'HTTP/1.1')) {
    $_SERVER['SERVER_PROTOCOL'] = 'HTTP/1.0';
  }
608

609 610 611 612 613 614 615 616 617 618 619 620 621 622 623
  if (isset($_SERVER['HTTP_HOST'])) {
    // As HTTP_HOST is user input, ensure it only contains characters allowed
    // in hostnames. See RFC 952 (and RFC 2181).
    // $_SERVER['HTTP_HOST'] is lowercased here per specifications.
    $_SERVER['HTTP_HOST'] = strtolower($_SERVER['HTTP_HOST']);
    if (!drupal_valid_http_host($_SERVER['HTTP_HOST'])) {
      // HTTP_HOST is invalid, e.g. if containing slashes it may be an attack.
      header($_SERVER['SERVER_PROTOCOL'] . ' 400 Bad Request');
      exit;
    }
  }
  else {
    // Some pre-HTTP/1.1 clients will not send a Host header. Ensure the key is
    // defined for E_ALL compliance.
    $_SERVER['HTTP_HOST'] = '';
624 625
  }

626 627
  // @todo Refactor with the Symfony Request object.
  _current_path(request_path());
628

629 630
  // Enforce E_STRICT, but allow users to set levels not part of E_STRICT.
  error_reporting(E_STRICT | E_ALL | error_reporting());
631

632 633 634
  // Override PHP settings required for Drupal to work properly.
  // sites/default/default.settings.php contains more runtime settings.
  // The .htaccess file contains settings that cannot be changed at runtime.
635

Dave Reid's avatar
Dave Reid committed
636 637 638 639 640 641 642
  // Deny execution with enabled "magic quotes" (both GPC and runtime).
  if (get_magic_quotes_gpc() || get_magic_quotes_runtime()) {
    header($_SERVER['SERVER_PROTOCOL'] . ' 500 Internal Server Error');
    print "PHP's 'magic_quotes_gpc' and 'magic_quotes_runtime' settings are not supported and must be disabled.";
    exit;
  }

643 644
  // Use session cookies, not transparent sessions that puts the session id in
  // the query string.
645
  ini_set('session.use_cookies', '1');
646
  ini_set('session.use_only_cookies', '1');
647
  ini_set('session.use_trans_sid', '0');
648
  // Don't send HTTP headers using PHP's session handler.
649 650
  // Send an empty string to disable the cache limiter.
  ini_set('session.cache_limiter', '');
651 652
  // Use httponly session cookies.
  ini_set('session.cookie_httponly', '1');
653 654 655 656

  // Set sane locale settings, to ensure consistent string, dates, times and
  // numbers handling.
  setlocale(LC_ALL, 'C');
Dave Reid's avatar
Dave Reid committed
657 658 659

  // Detect string handling method.
  unicode_check();
660 661
}

662
/**
663
 * Validates that a hostname (for example $_SERVER['HTTP_HOST']) is safe.
664 665 666 667
 *
 * @return
 *  TRUE if only containing valid characters, or FALSE otherwise.
 */
668 669
function drupal_valid_http_host($host) {
  return preg_match('/^\[?(?:[a-zA-Z0-9-:\]_]+\.?)+$/', $host);
670 671
}

Dave Reid's avatar
Dave Reid committed
672 673 674 675 676 677 678 679 680 681 682 683 684 685 686 687 688 689 690 691 692 693 694 695 696 697 698 699 700 701 702 703 704 705 706 707 708 709 710 711 712 713 714 715 716
/**
 * Checks for Unicode support in PHP and sets the proper settings if possible.
 *
 * Because Drupal needs to be able to handle text in various encodings, we do
 * not support mbstring function overloading. HTTP input/output conversion must
 * be disabled for similar reasons.
 *
 * @return string
 *   A string identifier of a failed multibyte extension check, if any.
 *   Otherwise, an empty string.
 */
function unicode_check() {
  global $multibyte;

  // Check for mbstring extension.
  if (!function_exists('mb_strlen')) {
    $multibyte = UNICODE_SINGLEBYTE;
    return 'mb_strlen';
  }

  // Check mbstring configuration.
  if (ini_get('mbstring.func_overload') != 0) {
    $multibyte = UNICODE_ERROR;
    return 'mbstring.func_overload';
  }
  if (ini_get('mbstring.encoding_translation') != 0) {
    $multibyte = UNICODE_ERROR;
    return 'mbstring.encoding_translation';
  }
  if (ini_get('mbstring.http_input') != 'pass') {
    $multibyte = UNICODE_ERROR;
    return 'mbstring.http_input';
  }
  if (ini_get('mbstring.http_output') != 'pass') {
    $multibyte = UNICODE_ERROR;
    return 'mbstring.http_output';
  }

  // Set appropriate configuration.
  mb_internal_encoding('utf-8');
  mb_language('uni');
  $multibyte = UNICODE_MULTIBYTE;
  return '';
}

717
/**
718
 * Sets the base URL, cookie domain, and session name from configuration.
719
 */
720
function drupal_settings_initialize() {
721
  global $base_url, $base_path, $base_root, $script_path;
722

723
  // Export these settings.php variables to the global namespace.
724
  global $databases, $cookie_domain, $conf, $installed_profile, $db_url, $db_prefix, $drupal_hash_salt, $is_https, $base_secure_url, $base_insecure_url, $config_directories;
Dries's avatar
Dries committed
725 726
  $conf = array();

727 728
  // Make conf_path() available as local variable in settings.php.
  $conf_path = conf_path();
729
  if (is_readable(DRUPAL_ROOT . '/' . $conf_path . '/settings.php')) {
730
    include_once DRUPAL_ROOT . '/' . $conf_path . '/settings.php';
731
  }
732 733
  require_once DRUPAL_ROOT . '/core/lib/Drupal/Component/Utility/Settings.php';
  new Settings(isset($settings) ? $settings : array());
734
  $is_https = isset($_SERVER['HTTPS']) && strtolower($_SERVER['HTTPS']) == 'on';
735 736 737 738

  if (isset($base_url)) {
    // Parse fixed base URL from settings.php.
    $parts = parse_url($base_url);
739 740 741
    if (!isset($parts['path'])) {
      $parts['path'] = '';
    }
742
    $base_path = $parts['path'] . '/';
743 744 745 746 747
    // Build $base_root (everything until first slash after "scheme://").
    $base_root = substr($base_url, 0, strlen($base_url) - strlen($parts['path']));
  }
  else {
    // Create base URL
748
    $http_protocol = $is_https ? 'https' : 'http';
749
    $base_root = $http_protocol . '://' . $_SERVER['HTTP_HOST'];
750

751
    $base_url = $base_root;
752

753 754
    // For a request URI of '/index.php/foo', $_SERVER['SCRIPT_NAME'] is
    // '/index.php', whereas $_SERVER['PHP_SELF'] is '/index.php/foo'.
755
    if ($dir = rtrim(dirname($_SERVER['SCRIPT_NAME']), '\/')) {
756
      // Remove "core" directory if present, allowing install.php, update.php,
757
      // and others to auto-detect a base path.
758 759 760 761 762 763 764
      $core_position = strrpos($dir, '/core');
      if ($core_position !== FALSE && strlen($dir) - 5 == $core_position) {
        $base_path = substr($dir, 0, $core_position);
      }
      else {
        $base_path = $dir;
      }
765 766 767 768 769 770 771
      $base_url .= $base_path;
      $base_path .= '/';
    }
    else {
      $base_path = '/';
    }
  }
772 773
  $base_secure_url = str_replace('http://', 'https://', $base_url);
  $base_insecure_url = str_replace('https://', 'http://', $base_url);
774

775 776 777 778 779 780 781 782 783 784 785 786 787 788 789 790 791 792 793 794 795 796 797 798 799 800
  // Determine the path of the script relative to the base path, and add a
  // trailing slash. This is needed for creating URLs to Drupal pages.
  if (!isset($script_path)) {
    $script_path = '';
    // We don't expect scripts outside of the base path, but sanity check
    // anyway.
    if (strpos($_SERVER['SCRIPT_NAME'], $base_path) === 0) {
      $script_path = substr($_SERVER['SCRIPT_NAME'], strlen($base_path)) . '/';
      // If the request URI does not contain the script name, then clean URLs
      // are in effect and the script path can be similarly dropped from URL
      // generation. For servers that don't provide $_SERVER['REQUEST_URI'], we
      // do not know the actual URI requested by the client, and request_uri()
      // returns a URI with the script name, resulting in non-clean URLs unless
      // there's other code that intervenes.
      if (strpos(request_uri(TRUE) . '/', $base_path . $script_path) !== 0) {
        $script_path = '';
      }
      // @todo Temporary BC for install.php, update.php, and other scripts.
      //   - http://drupal.org/node/1547184
      //   - http://drupal.org/node/1546082
      if ($script_path !== 'index.php/') {
        $script_path = '';
      }
    }
  }

801 802 803 804 805
  if ($cookie_domain) {
    // If the user specifies the cookie domain, also use it for session name.
    $session_name = $cookie_domain;
  }
  else {
806
    // Otherwise use $base_url as session name, without the protocol
807
    // to use the same session identifiers across HTTP and HTTPS.
808
    list( , $session_name) = explode('://', $base_url, 2);
809 810
    // HTTP_HOST can be modified by a visitor, but we already sanitized it
    // in drupal_settings_initialize().
811
    if (!empty($_SERVER['HTTP_HOST'])) {
812
      $cookie_domain = $_SERVER['HTTP_HOST'];
813 814 815 816 817 818 819
      // Strip leading periods, www., and port numbers from cookie domain.
      $cookie_domain = ltrim($cookie_domain, '.');
      if (strpos($cookie_domain, 'www.') === 0) {
        $cookie_domain = substr($cookie_domain, 4);
      }
      $cookie_domain = explode(':', $cookie_domain);
      $cookie_domain = '.' . $cookie_domain[0];
820 821 822 823 824 825 826
    }
  }
  // Per RFC 2109, cookie domains must contain at least one dot other than the
  // first. For hosts such as 'localhost' or IP Addresses we don't set a cookie domain.
  if (count(explode('.', $cookie_domain)) > 2 && !is_numeric(str_replace('.', '', $cookie_domain))) {
    ini_set('session.cookie_domain', $cookie_domain);
  }
827 828 829 830 831 832 833 834 835 836
  // To prevent session cookies from being hijacked, a user can configure the
  // SSL version of their website to only transfer session cookies via SSL by
  // using PHP's session.cookie_secure setting. The browser will then use two
  // separate session cookies for the HTTPS and HTTP versions of the site. So we
  // must use different session identifiers for HTTPS and HTTP to prevent a
  // cookie collision.
  if ($is_https) {
    ini_set('session.cookie_secure', TRUE);
  }
  $prefix = ini_get('session.cookie_secure') ? 'SSESS' : 'SESS';
837
  session_name($prefix . substr(hash('sha256', $session_name), 0, 32));
838 839
}

Dries's avatar
Dries committed
840
/**
841 842 843 844
 * Returns and optionally sets the filename for a system resource.
 *
 * The filename, whether provided, cached, or retrieved from the database, is
 * only returned if the file exists.
Dries's avatar
Dries committed
845
 *
Dries's avatar
Dries committed
846 847 848 849 850
 * This function plays a key role in allowing Drupal's resources (modules
 * and themes) to be located in different places depending on a site's
 * configuration. For example, a module 'foo' may legally be be located
 * in any of these three places:
 *
851
 * core/modules/foo/foo.module
Dries's avatar
Dries committed
852 853 854 855 856 857
 * modules/foo/foo.module
 * sites/example.com/modules/foo/foo.module
 *
 * Calling drupal_get_filename('module', 'foo') will give you one of
 * the above, depending on where the module is located.
 *
Dries's avatar
Dries committed
858
 * @param $type
859
 *   The type of the item (i.e. theme, theme_engine, module, profile).
Dries's avatar
Dries committed
860 861 862 863 864 865 866 867 868
 * @param $name
 *   The name of the item for which the filename is requested.
 * @param $filename
 *   The filename of the item if it is to be set explicitly rather
 *   than by consulting the database.
 *
 * @return
 *   The filename of the requested item.
 */
Dries's avatar
Dries committed
869
function drupal_get_filename($type, $name, $filename = NULL) {
870 871
  // The location of files will not change during the request, so do not use
  // drupal_static().
872
  static $files = array(), $dirs = array();
Dries's avatar
Dries committed
873

874 875 876
  // Profiles are converted into modules in system_rebuild_module_data().
  // @todo Remove false-exposure of profiles as modules.
  $original_type = $type;
877
  if ($type == 'profile') {
878
    $type = 'module';
879
  }
880
  if (!isset($files[$type])) {
Dries's avatar
Dries committed
881 882 883
    $files[$type] = array();
  }

884
  if (!empty($filename) && file_exists($filename)) {
Dries's avatar
Dries committed
885 886
    $files[$type][$name] = $filename;
  }
887
  elseif (isset($files[$type][$name])) {
Dries's avatar
Dries committed
888 889 890
    // nothing
  }
  else {
891 892 893
    // Verify that we have an keyvalue service before using it. This is required
    // because this function is called during installation.
    // @todo Inject database connection into KeyValueStore\DatabaseStorage.
894
    if (($container = drupal_container()) && $container->has('keyvalue') && function_exists('db_query')) {
895 896 897 898 899 900 901 902
      if ($type == 'module') {
        if (empty($files[$type])) {
          $files[$type] = drupal_container()->get('module_handler')->getModuleList();
        }
        if (isset($files[$type][$name])) {
          return $files[$type][$name];
        }
      }
903 904 905 906
      try {
        $file_list = state()->get('system.' . $type . '.files');
        if ($file_list && isset($file_list[$name]) && file_exists(DRUPAL_ROOT . '/' . $file_list[$name])) {
          $files[$type][$name] = $file_list[$name];
907
        }
908
      }
909 910 911 912 913
      catch (Exception $e) {
        // The keyvalue service raised an exception because the backend might
        // be down. We have a fallback for this case so we hide the error
        // completely.
      }
914 915 916 917
    }
    // Fallback to searching the filesystem if the database could not find the
    // file or the file returned by the database is not found.
    if (!isset($files[$type][$name])) {
918
      // We have consistent directory naming: modules, themes...
919 920 921
      $dir = $type . 's';
      if ($type == 'theme_engine') {
        $dir = 'themes/engines';
922
        $extension = 'engine';
923 924
      }
      elseif ($type == 'theme') {
925
        $extension = 'info';
926
      }
927 928 929 930 931 932
      // Profiles are converted into modules in system_rebuild_module_data().
      // @todo Remove false-exposure of profiles as modules.
      elseif ($original_type == 'profile') {
        $dir = 'profiles';
        $extension = 'profile';
      }
933
      else {
934
        $extension = $type;
935 936
      }

937 938 939
      if (!isset($dirs[$dir][$extension])) {
        $dirs[$dir][$extension] = TRUE;
        if (!function_exists('drupal_system_listing')) {
940
          require_once DRUPAL_ROOT . '/core/includes/common.inc';