include/init.php

   1 <?php
   2
   3 /**
   4  * init.php -- initialisation file
   5  *
   6  * File should be loaded in every file in src/ or plugins that occupate an entire frame
   7  *
   8  * @copyright &copy; 2006 The SquirrelMail Project Team
   9  * @license http://opensource.org/licenses/gpl-license.php GNU Public License
  10  * @version $Id$
  11  * @package squirrelmail
  12  */
  13
  14 /**
  15  * This is a development version so in order to track programmer mistakes we
  16  * set the error reporting to E_ALL
  17 FIXME: disabling this for now, because we now have $sm_debug_mode, but the problem with that is that we don't know what it will be until we have loaded the config file, a good 175 lines below after several important files have been included, etc.  For now, we'll trust that developers have turned on E_ALL in php.ini anyway, but this can be uncommented if not.
  18  */
  19 //error_reporting(E_ALL);
  20
  21
  22
  23 /**
  24  * Make sure we have a page name
  25  *
  26  */
  27 if ( !defined('PAGE_NAME') ) define('PAGE_NAME', NULL);
  28
  29
  30 /**
  31  * If register_globals are on, unregister globals.
  32  * Second test covers boolean set as string (php_value register_globals off).
  33  */
  34 if ((bool) ini_get('register_globals') &&
  35     strtolower(ini_get('register_globals'))!='off') {
  36     /**
  37      * Remove all globals that are not reserved by PHP
  38      * 'value' and 'key' are used by foreach. Don't unset them inside foreach.
  39      */
  40     foreach ($GLOBALS as $key => $value) {
  41         switch($key) {
  42         case 'HTTP_POST_VARS':
  43         case '_POST':
  44         case 'HTTP_GET_VARS':
  45         case '_GET':
  46         case 'HTTP_COOKIE_VARS':
  47         case '_COOKIE':
  48         case 'HTTP_SERVER_VARS':
  49         case '_SERVER':
  50         case 'HTTP_ENV_VARS':
  51         case '_ENV':
  52         case 'HTTP_POST_FILES':
  53         case '_FILES':
  54         case '_REQUEST':
  55         case 'HTTP_SESSION_VARS':
  56         case '_SESSION':
  57         case 'GLOBALS':
  58         case 'key':
  59         case 'value':
  60             break;
  61         default:
  62             unset($GLOBALS[$key]);
  63         }
  64     }
  65     // Unset variables used in foreach
  66     unset($GLOBALS['key']);
  67     unset($GLOBALS['value']);
  68 }
  69
  70 /**
  71  * Used as a dummy value, e.g., for passing as an empty
  72  * hook argument (where the value is passed by reference,
  73  * and therefore NULL itself is not acceptable).
  74  */
  75 global $null;
  76 $null = NULL;
  77
  78 /**
  79  * [#1518885] session.use_cookies = off breaks SquirrelMail
  80  *
  81  * When session cookies are not used, all http redirects, meta refreshes,
  82  * src/download.php and javascript URLs are broken. Setting must be set
  83  * before session is started.
  84  */
  85 if (!(bool)ini_get('session.use_cookies') ||
  86     ini_get('session.use_cookies') == 'off') {
  87     ini_set('session.use_cookies','1');
  88 }
  89
  90
  91 /**
  92  * calculate SM_PATH and calculate the base_uri
  93  * assumptions made: init.php is only called from plugins or from the src dir.
  94  * files in the plugin directory may not be part of a subdirectory called "src"
  95  *
  96  */
  97 if (isset($_SERVER['SCRIPT_NAME'])) {
  98     $a = explode('/', $_SERVER['SCRIPT_NAME']);
  99 } elseif (isset($HTTP_SERVER_VARS['SCRIPT_NAME'])) {
 100     $a = explode('/', $HTTP_SERVER_VARS['SCRIPT_NAME']);
 101 } else {
 102     $error = 'Unable to detect script environment. Please test your PHP '
 103            . 'settings and send your PHP core configuration, $_SERVER and '
 104            . '$HTTP_SERVER_VARS contents to the SquirrelMail developers.';
 105     die($error);
 106 }
 107 $sSM_PATH = '';
 108 for($i = count($a) -2; $i > -1; --$i) {
 109     $sSM_PATH .= '../';
 110     if ($a[$i] === 'src' || $a[$i] === 'plugins') {
 111         break;
 112     }
 113 }
 114
 115 $base_uri = implode('/', array_slice($a, 0, $i)). '/';
 116
 117 define('SM_PATH',$sSM_PATH);
 118 define('SM_BASE_URI', $base_uri);
 119
 120
 121 /**
 122  * global var $bInit is used to check if initialisation took place.
 123  * At this moment it's a workarounf for the include of addrbook_search_html
 124  * inside compose.php. If we found a better way then remove this. Do only use
 125  * this var if you know for sure a page can be called stand alone and be included
 126  * in another file.
 127  */
 128 $bInit = true;
 129
 130 /**
 131  * This theme as a failsafe if no themes were found, or if we error
 132  * out before anything could be initialised.
 133  */
 134 $color = array();
 135 $color[0]  = '#DCDCDC';  /* light gray    TitleBar               */
 136 $color[1]  = '#800000';  /* red                                  */
 137 $color[2]  = '#CC0000';  /* light red     Warning/Error Messages */
 138 $color[3]  = '#A0B8C8';  /* green-blue    Left Bar Background    */
 139 $color[4]  = '#FFFFFF';  /* white         Normal Background      */
 140 $color[5]  = '#FFFFCC';  /* light yellow  Table Headers          */
 141 $color[6]  = '#000000';  /* black         Text on left bar       */
 142 $color[7]  = '#0000CC';  /* blue          Links                  */
 143 $color[8]  = '#000000';  /* black         Normal text            */
 144 $color[9]  = '#ABABAB';  /* mid-gray      Darker version of #0   */
 145 $color[10] = '#666666';  /* dark gray     Darker version of #9   */
 146 $color[11] = '#770000';  /* dark red      Special Folders color  */
 147 $color[12] = '#EDEDED';
 148 $color[13] = '#800000';  /* (dark red)    Color for quoted text -- > 1 quote */
 149 $color[14] = '#ff0000';  /* (red)         Color for quoted text -- >> 2 or more */
 150 $color[15] = '#002266';  /* (dark blue)   Unselectable folders */
 151 $color[16] = '#ff9933';  /* (orange)      Highlight color */
 152
 153 require(SM_PATH . 'include/constants.php');
 154 require(SM_PATH . 'functions/global.php');
 155 require(SM_PATH . 'functions/strings.php');
 156 require(SM_PATH . 'functions/arrays.php');
 157
 158 /* load default configuration */
 159 require(SM_PATH . 'config/config_default.php');
 160 /* reset arrays in default configuration */
 161 $ldap_server = array();
 162 $plugins = array();
 163 $fontsets = array();
 164 $aTemplateSet = array();
 165 $aTemplateSet[0]['ID'] = 'default';
 166 $aTemplateSet[0]['NAME'] = 'Default';
 167
 168 /* load site configuration */
 169 require(SM_PATH . 'config/config.php');
 170 /* load local configuration overrides */
 171 if (file_exists(SM_PATH . 'config/config_local.php')) {
 172     require(SM_PATH . 'config/config_local.php');
 173 }
 174
 175
 176 /**
 177  * Set PHP error reporting level based on the SquirrelMail debug mode
 178  */
 179 $error_level = 0;
 180 if ($sm_debug_mode & SM_DEBUG_MODE_SIMPLE)
 181     $error_level |= E_ERROR;
 182 if ($sm_debug_mode & SM_DEBUG_MODE_MODERATE
 183  || $sm_debug_mode & SM_DEBUG_MODE_ADVANCED)
 184     $error_level |= E_ALL;
 185 if ($sm_debug_mode & SM_DEBUG_MODE_STRICT)
 186     $error_level |= E_STRICT;
 187 error_reporting($error_level);
 188
 189
 190 require(SM_PATH . 'functions/plugin.php');
 191 require(SM_PATH . 'include/languages.php');
 192 require(SM_PATH . 'class/template/Template.class.php');
 193 require(SM_PATH . 'class/error.class.php');
 194
 195 /**
 196  * If magic_quotes_runtime is on, SquirrelMail breaks in new and creative ways.
 197  * Force magic_quotes_runtime off.
 198  * tassium@squirrelmail.org - I put it here in the hopes that all SM code includes this.
 199  * If there's a better place, please let me know.
 200  */
 201 ini_set('magic_quotes_runtime','0');
 202
 203
 204 /* if running with magic_quotes_gpc then strip the slashes
 205    from POST and GET global arrays */
 206 if (function_exists('get_magic_quotes_gpc') && @get_magic_quotes_gpc()) {
 207     sqstripslashes($_GET);
 208     sqstripslashes($_POST);
 209 }
 210
 211
 212 /* strip any tags added to the url from PHP_SELF.
 213 This fixes hand crafted url XXS expoits for any
 214    page that uses PHP_SELF as the FORM action */
 215 $_SERVER['PHP_SELF'] = strip_tags($_SERVER['PHP_SELF']);
 216
 217 $PHP_SELF = php_self();
 218
 219 /**
 220  * Initialize the session
 221  */
 222
 223 /** set the name of the session cookie */
 224 if (!isset($session_name) || !$session_name) {
 225     $session_name = 'SQMSESSID';
 226 }
 227
 228 /**
 229  * When session.auto_start is On we want to destroy/close the session
 230  */
 231 $sSessionAutostartName = session_name();
 232 $sCookiePath = null;
 233 if (isset($sSessionAutostartName) && $sSessionAutostartName !== $session_name) {
 234     $sCookiePath = ini_get('session.cookie_path');
 235     $sCookieDomain = ini_get('session.cookie_domain');
 236     // reset the cookie
 237     setcookie($sSessionAutostartName,'',time() - 604800,$sCookiePath,$sCookieDomain);
 238     @session_destroy();
 239     session_write_close();
 240 }
 241
 242 /**
 243  * includes from classes stored in the session
 244  */
 245 require(SM_PATH . 'class/mime.class.php');
 246
 247 ini_set('session.name' , $session_name);
 248 session_set_cookie_params (0, $base_uri);
 249 sqsession_is_active();
 250
 251 /**
 252  * When on login page, have to reset the user session, making
 253  * sure to save session restore data first
 254  */
 255 if (PAGE_NAME == 'login') {
 256     if (!sqGetGlobalVar('session_expired_post', $sep, SQ_SESSION))
 257         $sep = '';
 258     if (!sqGetGlobalVar('session_expired_location', $sel, SQ_SESSION))
 259         $sel = '';
 260     sqsession_destroy();
 261     session_write_close();
 262
 263     /**
 264      * in some rare instances, the session seems to stick
 265      * around even after destroying it (!!), so if it does,
 266      * we'll manually flatten the $_SESSION data
 267      */
 268     if (!empty($_SESSION))
 269         $_SESSION = array();
 270
 271     /**
 272      * Allow administrators to define custom session handlers
 273      * for SquirrelMail without needing to change anything in
 274      * php.ini (application-level).
 275      *
 276      * In config_local.php, admin needs to put:
 277      *
 278      *     $custom_session_handlers = array(
 279      *         'my_open_handler',
 280      *         'my_close_handler',
 281      *         'my_read_handler',
 282      *         'my_write_handler',
 283      *         'my_destroy_handler',
 284      *         'my_gc_handler',
 285      *     );
 286      *     session_module_name('user');
 287      *     session_set_save_handler(
 288      *         $custom_session_handlers[0],
 289      *         $custom_session_handlers[1],
 290      *         $custom_session_handlers[2],
 291      *         $custom_session_handlers[3],
 292      *         $custom_session_handlers[4],
 293      *         $custom_session_handlers[5]
 294      *     );
 295      *
 296      * We need to replicate that code once here because PHP has
 297      * long had a bug that resets the session handler mechanism
 298      * when the session data is also destroyed.  Because of this
 299      * bug, even administrators who define custom session handlers
 300      * via a PHP pre-load defined in php.ini (auto_prepend_file)
 301      * will still need to define the $custom_session_handlers array
 302      * in config_local.php.
 303      */
 304     global $custom_session_handlers;
 305     if (!empty($custom_session_handlers)) {
 306         $open    = $custom_session_handlers[0];
 307         $close   = $custom_session_handlers[1];
 308         $read    = $custom_session_handlers[2];
 309         $write   = $custom_session_handlers[3];
 310         $destroy = $custom_session_handlers[4];
 311         $gc      = $custom_session_handlers[5];
 312         session_module_name('user');
 313         session_set_save_handler($open, $close, $read, $write, $destroy, $gc);
 314     }
 315
 316     sqsession_is_active();
 317     session_regenerate_id();
 318
 319     // put session restore data back into session if necessary
 320     if (!empty($sel)) {
 321         sqsession_register($sel, 'session_expired_location');
 322         if (!empty($sep))
 323             sqsession_register($sep, 'session_expired_post');
 324     }
 325 }
 326
 327 /**
 328  * SquirrelMail internal version number -- DO NOT CHANGE
 329  * $sm_internal_version = array (release, major, minor)
 330  */
 331 $SQM_INTERNAL_VERSION = explode('.', SM_VERSION, 3);
 332 $SQM_INTERNAL_VERSION[2] = intval($SQM_INTERNAL_VERSION[2]);
 333
 334
 335 /* load prefs system; even when user not logged in, should be OK to do this here */
 336 require(SM_PATH . 'functions/prefs.php');
 337
 338 // FIXME: config/plugin_hooks.php has not yet been loaded (see a few lines below); so this hook call should I think not be working -- has anyone actually tested it?  Is there any reason we cannot move this prefs code block down below "MAIN PLUGIN LOADING CODE HERE" (see below)?  Reading the code, I *think* it should be OK, but....   Also, note that this code would then be placed immediately next to the config_override hook, and since it makes little sense to execute two hooks in a row, I will propose removing config_override (although sadly, it is less clear to plugin authors that they should use the prefs_backend hook to do any configuration override work in their plugin)
 339 $prefs_backend = do_hook('prefs_backend', $null);
 340 if (isset($prefs_backend) && !empty($prefs_backend) && file_exists(SM_PATH . $prefs_backend)) {
 341     require(SM_PATH . $prefs_backend);
 342 } elseif (isset($prefs_dsn) && !empty($prefs_dsn)) {
 343     require(SM_PATH . 'functions/db_prefs.php');
 344 } else {
 345     require(SM_PATH . 'functions/file_prefs.php');
 346 }
 347
 348
 349 /* if plugins are disabled only for one user and
 350  * the current user is NOT that user, turn them
 351  * back on
 352  */
 353 sqgetGlobalVar('username',$username,SQ_SESSION);
 354 if ($disable_plugins && !empty($disable_plugins_user)
 355  && $username != $disable_plugins_user) {
 356     $disable_plugins = false;
 357 }
 358
 359 /* remove all plugins if they are disabled */
 360 if ($disable_plugins) {
 361    $plugins = array();
 362 }
 363
 364
 365 /**
 366  * Include Compatibility plugin if available.
 367  */
 368 if (!$disable_plugins && file_exists(SM_PATH . 'plugins/compatibility/functions.php'))
 369     include_once(SM_PATH . 'plugins/compatibility/functions.php');
 370
 371 /**
 372  * MAIN PLUGIN LOADING CODE HERE
 373  * On init, we no longer need to load all plugin setup files.
 374  * Now, we load the statically generated hook registrations here
 375  * and let the hook calls include only the plugins needed.
 376  */
 377 $squirrelmail_plugin_hooks = array();
 378 if (!$disable_plugins && file_exists(SM_PATH . 'config/plugin_hooks.php')) {
 379     require(SM_PATH . 'config/plugin_hooks.php');
 380 }
 381
 382 /**
 383  * allow plugins to override main configuration; hook is placed
 384  * here to allow plugins to use session information to do their work
 385  */
 386 do_hook('config_override', $null);
 387
 388 /**
 389  * DISABLED.
 390  * Remove globalized session data in rg=on setups
 391  *
 392  * Code can be utilized when session is started, but data is not loaded.
 393  * We have already loaded configuration and other important vars. Can't
 394  * clean session globals here, beside, the cleanout of globals at the
 395  * top of this file will have removed anything this code would find anyway.
 396 if ((bool) @ini_get('register_globals') &&
 397     strtolower(ini_get('register_globals'))!='off') {
 398     foreach ($_SESSION as $key => $value) {
 399         unset($GLOBALS[$key]);
 400     }
 401 }
 402 */
 403
 404 sqsession_register(SM_BASE_URI,'base_uri');
 405
 406 /**
 407  * Retrieve the language cookie
 408  */
 409 if (! sqgetGlobalVar('squirrelmail_language',$squirrelmail_language,SQ_COOKIE)) {
 410     $squirrelmail_language = '';
 411 }
 412
 413
 414 /**
 415  * Do something special for some pages. This is based on the PAGE_NAME constant
 416  * set at the top of every page.
 417  */
 418 switch (PAGE_NAME) {
 419     case 'style':
 420
 421         // need to get the right template set up
 422         //
 423         sqGetGlobalVar('templateid', $templateid, SQ_GET);
 424
 425         // sanitize just in case...
 426         //
 427         $templateid = preg_replace('/(\.\.\/){1,}/', '', $templateid);
 428
 429         // make sure given template actually is available
 430         //
 431         $found_templateset = false;
 432         for ($i = 0; $i < count($aTemplateSet); ++$i) {
 433             if ($aTemplateSet[$i]['ID'] == $templateid) {
 434                 $found_templateset = true;
 435                 break;
 436             }
 437         }
 438
 439 // FIXME: do we need/want to check here for actual (physical) presence of template sets?
 440         // selected template not available, fall back to default template
 441         //
 442         if (!$found_templateset) {
 443             $sTemplateID = Template::get_default_template_set();
 444         } else {
 445             $sTemplateID = $templateid;
 446         }
 447
 448         session_write_close();
 449         break;
 450
 451     case 'mailto':
 452         // nothing to do
 453         break;
 454
 455     case 'redirect':
 456         require(SM_PATH . 'functions/auth.php');
 457         //nobreak;
 458
 459     case 'login':
 460         require(SM_PATH . 'functions/display_messages.php' );
 461         require(SM_PATH . 'functions/page_header.php');
 462         require(SM_PATH . 'functions/html.php');
 463
 464         // reset template file cache
 465         //
 466         $sTemplateID = Template::get_default_template_set();
 467         Template::cache_template_file_hierarchy(TRUE);
 468
 469         /**
 470          * Make sure icon variables are setup for the login page.
 471          */
 472         $icon_theme = $icon_themes[$icon_theme_def]['PATH'];
 473         /*
 474          * NOTE: The $icon_theme_path var should contain the path to the icon
 475          *       theme to use.  If the admin has disabled icons, or the user has
 476          *       set the icon theme to "None," no icons will be used.
 477          */
 478         $icon_theme_path = (!$use_icons || $icon_theme=='none') ? NULL : ($icon_theme == 'template' ? SM_PATH . Template::calculate_template_images_directory($sTemplateID) : $icon_theme);
 479
 480         /**
 481          * cleanup old cookies with a cookie path the same as the standard php.ini
 482          * cookie path. All previous SquirrelMail version used the standard php.ini
 483          * cookie path for storing the session name. That behaviour changed.
 484          */
 485         if ($sCookiePath !== SM_BASE_URI) {
 486             /**
 487              * do not delete the standard sessions with session.name is i.e. PHPSESSID
 488              * because they probably belong to other php apps
 489              */
 490             if (ini_get('session.name') !== $sSessionAutostartName) {
 491                 //  This does not work. Sometimes the cookie with SQSESSID=deleted and path /
 492                 // is picked up in webmail.php => login will fail
 493                 //sqsetcookie(ini_get('session.name'),'',0,$sCookiePath);
 494             }
 495         }
 496         break;
 497     default:
 498         require(SM_PATH . 'functions/display_messages.php' );
 499         require(SM_PATH . 'functions/page_header.php');
 500         require(SM_PATH . 'functions/html.php');
 501
 502
 503         /**
 504          * Check if we are logged in
 505          */
 506         require(SM_PATH . 'functions/auth.php');
 507
 508         if ( !sqsession_is_registered('user_is_logged_in') ) {
 509
 510             // use $message to indicate what logout text the user
 511             // will see... if 0, typical "You must be logged in"
 512             // if 1, information that the user session was saved
 513             // and will be resumed after (re)login
 514             //
 515             $message = 0;
 516
 517             //  First we store some information in the new session to prevent
 518             //  information-loss.
 519             //
 520             $session_expired_post = $_POST;
 521             $session_expired_location = PAGE_NAME;
 522             if (!sqsession_is_registered('session_expired_post')) {
 523                 sqsession_register($session_expired_post,'session_expired_post');
 524             }
 525             if (!sqsession_is_registered('session_expired_location')) {
 526                 sqsession_register($session_expired_location,'session_expired_location');
 527                 if ($session_expired_location == 'compose')
 528                     $message = 1;
 529             }
 530             // signout page will deal with users who aren't logged
 531             // in on its own; don't show error here
 532             //
 533             if ( PAGE_NAME == 'signout' ) {
 534                 return;
 535             }
 536
 537             /**
 538              * Initialize the template object (logout_error uses it)
 539              */
 540             /*
 541              * $sTemplateID is not initialized when a user is not logged in, so we
 542              * will use the config file defaults here.  If the neccesary variables
 543              * are net set, force a default value.
 544              */
 545             $sTemplateID = Template::get_default_template_set();
 546             $oTemplate = Template::construct_template($sTemplateID);
 547
 548             set_up_language($squirrelmail_language, true);
 549             if (!$message)
 550                 logout_error( _("You must be logged in to access this page.") );
 551             else
 552                 logout_error( _("Your session has expired, but will be resumed after logging in again.") );
 553             exit;
 554         }
 555
 556         sqgetGlobalVar('authz',$authz,SQ_SESSION);
 557
 558         /**
 559          * Setting the prefs backend
 560          */
 561         sqgetGlobalVar('prefs_cache', $prefs_cache, SQ_SESSION );
 562         sqgetGlobalVar('prefs_are_cached', $prefs_are_cached, SQ_SESSION );
 563
 564         if ( !sqsession_is_registered('prefs_are_cached') ||
 565             !isset( $prefs_cache) ||
 566             !is_array( $prefs_cache)) {
 567             $prefs_are_cached = false;
 568             $prefs_cache = false; //array();
 569         }
 570
 571         /**
 572          * initializing user settings
 573          */
 574         require(SM_PATH . 'include/load_prefs.php');
 575
 576 // i do not understand the frames language cookie story
 577         /**
 578          * We'll need this to later have a noframes version
 579          *
 580          * Check if the user has a language preference, but no cookie.
 581          * Send him a cookie with his language preference, if there is
 582          * such discrepancy.
 583          */
 584          $my_language = getPref($data_dir, $username, 'language');
 585          if ($my_language != $squirrelmail_language) {
 586              sqsetcookie('squirrelmail_language', $my_language, time()+2592000, $base_uri);
 587          }
 588 // /dont understand
 589
 590         /**
 591          * Set up the language.
 592          */
 593         $err=set_up_language(getPref($data_dir, $username, 'language'));
 594
 595         // Japanese translation used without mbstring support
 596         if ($err==2) {
 597             $sError = "<p>Your administrator needs to have PHP installed with the multibyte string extension enabled (using configure option --enable-mbstring).</p>\n"
 598                     . "<p>This system has assumed that you accidently switched to Japanese and has reverted your language preference to English.</p>\n"
 599                     . "<p>Please refresh this page in order to continue using your webmail.</p>\n";
 600             error_box($sError);
 601         }
 602
 603         $timeZone = getPref($data_dir, $username, 'timezone');
 604
 605         /* Check to see if we are allowed to set the TZ environment variable.
 606          * We are able to do this if ...
 607          *   safe_mode is disabled OR
 608          *   safe_mode_allowed_env_vars is empty (you are allowed to set any) OR
 609          *   safe_mode_allowed_env_vars contains TZ
 610          */
 611         $tzChangeAllowed = (!ini_get('safe_mode')) ||
 612                             !strcmp(ini_get('safe_mode_allowed_env_vars'),'') ||
 613                             preg_match('/^([\w_]+,)*TZ/', ini_get('safe_mode_allowed_env_vars'));
 614
 615         if ( $timeZone != SMPREF_NONE && ($timeZone != "")
 616             && $tzChangeAllowed ) {
 617
 618             // get time zone key, if strict or custom strict timezones are used
 619             if (isset($time_zone_type) &&
 620                 ($time_zone_type == 1 || $time_zone_type == 3)) {
 621                 /* load time zone functions */
 622                 require(SM_PATH . 'include/timezones.php');
 623                 $realTimeZone = sq_get_tz_key($timeZone);
 624             } else {
 625                 $realTimeZone = $timeZone;
 626             }
 627
 628             // set time zone
 629             if ($realTimeZone) {
 630                 putenv("TZ=".$realTimeZone);
 631             }
 632         }
 633
 634         /**
 635          * php 5.1.0 added time zone functions. Set time zone with them in order
 636          * to prevent E_STRICT notices and allow time zone modifications in safe_mode.
 637          */
 638         if (function_exists('date_default_timezone_set')) {
 639             if ($timeZone != SMPREF_NONE && $timeZone != "") {
 640                 date_default_timezone_set($timeZone);
 641             } else {
 642                 // interface runs on server's time zone. Remove php E_STRICT complains
 643                 $default_timezone = @date_default_timezone_get();
 644                 date_default_timezone_set($default_timezone);
 645             }
 646         }
 647         break;
 648 }
 649
 650 /*
 651  * $sTemplateID is not initialized when a user is not logged in, so we
 652  * will use the config file defaults here.  If the neccesary variables
 653  * are not set, force a default value.
 654  *
 655  * If the user is logged in, $sTemplateID will be set in load_prefs.php,
 656  * so we shouldn't change it here.
 657  */
 658 if (!isset($sTemplateID)) {
 659     $sTemplateID = Template::get_default_template_set();
 660     $icon_theme_path = !$use_icons ? NULL : Template::calculate_template_images_directory($sTemplateID);
 661 }
 662
 663 // template object may have already been constructed in load_prefs.php
 664 //
 665 if (empty($oTemplate)) {
 666     $oTemplate = Template::construct_template($sTemplateID);
 667 }
 668
 669 // We want some variables to always be available to the template
 670 //
 671 $oTemplate->assign('javascript_on',
 672     (sqGetGlobalVar('user_is_logged_in', $user_is_logged_in, SQ_SESSION)
 673      ?  checkForJavascript() : 0));
 674 $oTemplate->assign('base_uri', sqm_baseuri());
 675 $always_include = array('sTemplateID', 'icon_theme_path');
 676 foreach ($always_include as $var) {
 677     $oTemplate->assign($var, (isset($$var) ? $$var : NULL));
 678 }
 679
 680 // A few output elements are used often, so just get them once here
 681 //
 682 $nbsp = $oTemplate->fetch('non_breaking_space.tpl');
 683 $br = $oTemplate->fetch('line_break.tpl');
 684
 685 /**
 686  * Initialize our custom error handler object
 687  */
 688 $oErrorHandler = new ErrorHandler($oTemplate,'error_message.tpl');
 689
 690 /**
 691  * Activate custom error handling
 692  */
 693 if (version_compare(PHP_VERSION, "4.3.0", ">=")) {
 694     $oldErrorHandler = set_error_handler(array($oErrorHandler, 'SquirrelMailErrorhandler'));
 695 } else {
 696     $oldErrorHandler = set_error_handler('SquirrelMailErrorhandler');
 697 }
 698
 699
 700 // ============================================================================
 701 // ================= End of Live Code, Beginning of Functions =================
 702 // ============================================================================
 703
 704
 705 /**
 706  * Javascript support detection function
 707  * @param boolean $reset recheck javascript support if set to true.
 708  * @return integer SMPREF_JS_ON or SMPREF_JS_OFF ({@see include/constants.php})
 709  * @since 1.5.1
 710  */
 711 function checkForJavascript($reset = FALSE) {
 712   global $data_dir, $username, $javascript_on, $javascript_setting;
 713
 714   if ( !$reset && sqGetGlobalVar('javascript_on', $javascript_on, SQ_SESSION) )
 715     return $javascript_on;
 716
 717   $user_is_logged_in = FALSE;
 718   if ( $reset || !isset($javascript_setting) )
 719     $javascript_setting = getPref($data_dir, $username, 'javascript_setting', SMPREF_JS_AUTODETECT);
 720
 721   if ( !sqGetGlobalVar('new_js_autodetect_results', $js_autodetect_results) &&
 722        !sqGetGlobalVar('js_autodetect_results', $js_autodetect_results) )
 723     $js_autodetect_results = SMPREF_JS_OFF;
 724
 725   if ( $javascript_setting == SMPREF_JS_AUTODETECT )
 726     $javascript_on = $js_autodetect_results;
 727   else
 728     $javascript_on = $javascript_setting;
 729
 730   sqsession_register($javascript_on, 'javascript_on');
 731   return $javascript_on;
 732 }
 733
 734 function sqm_baseuri() {
 735     global $base_uri;
 736     return $base_uri;
 737 }