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