bounce.php

   1 <?php
   2 /****************************************************************/
   3 /* ATutor                                                                                                               */
   4 /****************************************************************/
   5 /* Copyright (c) 2002-2010                                      */
   6 /* Inclusive Design Institute                                   */
   7 /* http://atutor.ca                                             */
   8 /*                                                              */
   9 /* This program is free software. You can redistribute it and/or*/
  10 /* modify it under the terms of the GNU General Public License  */
  11 /* as published by the Free Software Foundation.                                */
  12 /****************************************************************/
  13 // $Id$
  14
  15 function apply_category_theme($category_id) {
  16         if (defined('AT_ENABLE_CATEGORY_THEMES') && AT_ENABLE_CATEGORY_THEMES) {
  17                 global $db;
  18
  19                 if ($category_id) {
  20                         // apply the theme for this category:
  21                         $sql    = "SELECT theme FROM ".TABLE_PREFIX."course_cats WHERE cat_id=$category_id";
  22                         $result = mysql_query($sql, $db);
  23                         if (($cat_row = mysql_fetch_assoc($result)) && $cat_row['theme']) {
  24                                 $_SESSION['prefs']['PREF_THEME'] = $cat_row['theme'];
  25                         } else {
  26                                 $th = get_default_theme();
  27                                 $_SESSION['prefs']['PREF_THEME'] = $th['dir_name'];
  28                         }
  29                 } else {
  30                         $th = get_default_theme();
  31                         $_SESSION['prefs']['PREF_THEME'] = $th['dir_name'];
  32                 }
  33         }
  34 }
  35
  36 function count_login( ) {
  37         global $db, $moduleFactory;
  38
  39         $module =& $moduleFactory->getModule(AT_MODULE_DIR_STANDARD.'/statistics');
  40         if (!$module->isEnabled()) {
  41                 return;
  42         }
  43         if ($_SESSION['is_guest']) {
  44             $sql   = "INSERT INTO ".TABLE_PREFIX."course_stats VALUES ($_SESSION[course_id], NOW(), 1, 0)";
  45         } else {
  46            $sql    = "INSERT INTO ".TABLE_PREFIX."course_stats VALUES ($_SESSION[course_id], NOW(), 0, 1)";
  47         }
  48
  49     $result = @mysql_query($sql, $db);
  50
  51     if (!$result) {
  52                 /* that entry already exists, then update it. */
  53                 if ($_SESSION['is_guest']) {
  54                         $sql   = "UPDATE ".TABLE_PREFIX."course_stats SET guests=guests+1 WHERE course_id=$_SESSION[course_id] AND login_date=CURDATE()";
  55                 } else {
  56                         $sql   = "UPDATE ".TABLE_PREFIX."course_stats SET members=members+1 WHERE course_id=$_SESSION[course_id] AND login_date=CURDATE()";
  57                 }
  58                 $result = @mysql_query($sql, $db);
  59         }
  60 }
  61
  62 function get_groups($course_id) {
  63         global $db;
  64
  65         $groups = array();
  66
  67         if (authenticate(AT_PRIV_GROUPS, true)) {
  68                 $sql = "SELECT G.group_id FROM ".TABLE_PREFIX."groups G INNER JOIN ".TABLE_PREFIX."groups_types T USING (type_id) WHERE T.course_id=$course_id";
  69         } else {
  70                 $sql = "SELECT G.group_id FROM ".TABLE_PREFIX."groups G INNER JOIN (".TABLE_PREFIX."groups_types T, ".TABLE_PREFIX."groups_members M) ON (G.type_id=T.type_id AND  G.group_id=M.group_id) WHERE T.course_id=$course_id AND M.member_id=$_SESSION[member_id]";
  71         }
  72         $result = mysql_query($sql, $db);
  73         while ($row = mysql_fetch_assoc($result)) {
  74                 $groups[$row['group_id']] = $row['group_id'];
  75         }
  76
  77         return $groups;
  78 }
  79
  80 $_user_location = 'public';
  81 define('AT_INCLUDE_PATH', 'include/');
  82 require(AT_INCLUDE_PATH.'vitals.inc.php');
  83
  84 if($_config['just_social'] == 1){
  85         header('Location: mods/_standard/social/index_mystart.php');
  86         exit;
  87 }
  88 $set_to_public = false;
  89 if ($_SERVER['PHP_SELF'] == $_base_path."acl.php") {
  90         //search through the auth table and find password that matches get password
  91         $key = $addslashes(key($_GET));
  92         $sql = "SELECT * FROM ".TABLE_PREFIX."course_access WHERE password='$key' AND (expiry_date > NOW() OR expiry_date+0 = 0) AND enabled=1";
  93         $result = mysql_query($sql, $db);
  94         if ($row = mysql_fetch_assoc($result)) {
  95                 $set_to_public = true;
  96                 $_GET['course'] = $row['course_id'];
  97                 $_SESSION['member_id'] = 0;
  98                 $_SESSION['valid_user'] = false;
  99                 $_SESSION['login'] = 'guest';
 100         }
 101 }
 102
 103
 104 if (isset($_GET['admin']) && isset($_SESSION['is_super_admin'])) {
 105         $sql = "SELECT login, `privileges`, language FROM ".TABLE_PREFIX."admins WHERE login='$_SESSION[is_super_admin]' AND `privileges`>0";
 106         $result = mysql_query($sql, $db);
 107
 108         if ($row = mysql_fetch_assoc($result)) {
 109                 $sql = "UPDATE ".TABLE_PREFIX."admins SET last_login=NOW() WHERE login='$_SESSION[is_super_admin]'";
 110                 mysql_query($sql, $db);
 111
 112                 $_SESSION['login']              = $row['login'];
 113                 $_SESSION['valid_user'] = true;
 114                 $_SESSION['course_id']  = -1;
 115                 $_SESSION['privileges'] = intval($row['privileges']);
 116                 $_SESSION['lang'] = $row['language'];
 117                 assign_session_prefs(unserialize(stripslashes($_config['pref_defaults'])));
 118                 unset($_SESSION['member_id']);
 119                 unset($_SESSION['is_super_admin']);
 120
 121                 write_to_log(AT_ADMIN_LOG_UPDATE, 'admins', mysql_affected_rows($db), $sql);
 122
 123                 $msg->addFeedback('LOGIN_SUCCESS');
 124
 125                 header('Location: admin/index.php');
 126                 exit;
 127         }
 128 }
 129
 130 if (!empty($_REQUEST['pu'])) {
 131         //request ib stands for 'is bounced', this is to avoid the infinite 302 redirect
 132         //A better way to deal with this rather than using querystring? (Session won't work)
 133         //Session doesn't work,leads to bounce out error as well.
 134         if (!empty($_REQUEST['ib'])) {
 135                 return;
 136         }
 137
 138         //for pretty url iff mod_rewrite is not on
 139         if ($_config['apache_mod_rewrite'] > 0){
 140                 //URL are in pretty format, but not in .htaccess RewriteRule format
 141                 //http://www.atutor.ca/atutor/mantis/view.php?id=3426
 142                 $page = url_rewrite($_REQUEST['pu'], AT_PRETTY_URL_NOT_HEADER, true) . '/ib/1';
 143         } else {
 144                 if ($_config['pretty_url'])
 145                 {
 146                         $orig_url = AT_PRETTY_URL_HANDLER.$_REQUEST['pu'];
 147                         $page = (substr($_REQUEST['pu'], -1) == '/') ? ($orig_url. 'ib/1/') : ($orig_url .'/ib/1/');
 148                 }
 149                 else
 150                         $page = AT_PRETTY_URL_HANDLER.$_REQUEST['pu'] . SEP .'ib=1';
 151         }
 152 } elseif (!empty($_REQUEST['p'])) {
 153         //For search
 154         $page = urldecode($_REQUEST['p']);
 155 } elseif (($_config['pretty_url'] > 0) && preg_match('/bounce.php\?course=([\d]+)$/', $_SERVER['REQUEST_URI'])==1) {
 156         //for browse, and my start page url rewrite.
 157         $page = url_rewrite($_SERVER['REQUEST_URI'], AT_PRETTY_URL_NOT_HEADER, true).'/index.php';      //force overwrite
 158 } else {
 159         //handles jump menu
 160         if (isset($_POST['jump']) && abs($_POST['course']) > 0){
 161                 $_SESSION['course_id'] = abs($_POST['course']);
 162         }
 163         $page = url_rewrite('index.php');
 164 }
 165
 166 if (substr($page, 0, 1) == '/') {
 167         $page = substr($page, 1);
 168 }
 169
 170 $_SESSION['enroll']             = AT_ENROLL_NO;
 171 $_SESSION['s_cid']              = 0;
 172 $_SESSION['privileges'] = 0;
 173 $_SESSION['is_admin']   = false;
 174
 175 if ($_SESSION['course_id'] == -1) {
 176         unset($_SESSION['valid_user']);
 177         unset($_SESSION['is_guest']);
 178         unset($_SESSION['login']);
 179         unset($_SESSION['is_admin']);
 180         unset($_SESSION['course_id']);
 181 }
 182
 183 if (isset($_REQUEST['course'])) { // is set guests access protected course
 184         $course = abs($_REQUEST['course']);
 185 } else if (isset($_REQUEST['p_course'])) { // is set when pretty url is turned on, access public course
 186         $course = abs($_REQUEST['p_course']);
 187 } else {
 188         $course = 0;
 189 }
 190
 191 if (($course === 0) && $_SESSION['valid_user']) {
 192         $_SESSION['course_id']    = 0;
 193         $_SESSION['last_updated'] = time()/60 - ONLINE_UPDATE - 1;
 194
 195         if (defined('AT_ENABLE_CATEGORY_THEMES') && AT_ENABLE_CATEGORY_THEMES) {
 196                 $th = get_default_theme();
 197                 $_SESSION['prefs']['PREF_THEME'] = $th['dir_name'];
 198         }
 199
 200         header('Location: users/index.php');
 201         exit;
 202 } else if (($course === 0) && !$_SESSION['valid_user']) { // guests
 203         header('Location: '.AT_BASE_HREF.'login.php');
 204         exit;
 205 } else if ($course == -1) {
 206         $_SESSION['course_id']    = 0;
 207         $_SESSION['last_updated'] = time()/60 - ONLINE_UPDATE - 1;
 208
 209         if (defined('AT_ENABLE_CATEGORY_THEMES') && AT_ENABLE_CATEGORY_THEMES) {
 210                 $th = get_default_theme();
 211                 $_SESSION['prefs']['PREF_THEME'] = $th['dir_name'];
 212         }
 213
 214         header('Location: users/index.php');
 215         exit;
 216 }
 217
 218 $sql    = "SELECT member_id, content_packaging, cat_id, access, title, UNIX_TIMESTAMP(release_date) AS u_release_date, UNIX_TIMESTAMP(end_date) AS u_end_date FROM ".TABLE_PREFIX."courses WHERE course_id=$course";
 219 $result = mysql_query($sql,$db);
 220 if (!$row = mysql_fetch_assoc($result)) {
 221         $msg->addError('ITEM_NOT_FOUND');
 222         if ($_SESSION['member_id']) {
 223                 header('Location: '.AT_BASE_HREF.'users/index.php');
 224         } else {
 225                 header('Location: '.AT_BASE_HREF.'login.php');
 226         }
 227         exit;
 228 }
 229
 230 if (!$_SESSION['member_id']) {
 231         assign_session_prefs(unserialize(stripslashes($_config['pref_defaults'])));
 232 }
 233
 234 $owner_id = $row['member_id'];
 235 $_SESSION['packaging'] = $row['content_packaging'];
 236
 237 $_SESSION['groups'] = array();
 238 unset($_SESSION['fs_owner_type']);
 239 unset($_SESSION['fs_owner_id']);
 240 unset($_SESSION['fs_folder_id']);
 241
 242 //check for acl var
 243 if ($set_to_public) {
 244         $row['access'] = "public";
 245 }
 246
 247 switch ($row['access']){
 248         case 'public':
 249                 if ($_GET['f']) {
 250                         $dest = './'.$page.'?f='.$addslashes($_GET['f']);
 251                 } /* else */
 252                 $dest = './'.$page;
 253
 254                 apply_category_theme($row['cat_id']);
 255
 256                 if (!$_SESSION['valid_user'] && ($row['u_release_date'] < time()) && (!$row['u_end_date'] || $row['u_end_date'] > time())) {
 257                         $_SESSION['course_id']    = $course;
 258                         /* guest login */
 259                         $_SESSION['login']              = 'guest';
 260                         $_SESSION['valid_user'] = false;
 261                         $_SESSION['member_id']  = 0;
 262                         $_SESSION['is_admin']   = false;
 263                         $_SESSION['is_guest']   = true;
 264
 265                         /* add guest login to counter: */
 266                         count_login();
 267                         if ($_config['pretty_url'])
 268                         {
 269                                 if (!strpos($dest, '/p_course/')) $dest .= '/p_course/'.$course;
 270                                 header('Location: '.$dest);
 271                                 exit;
 272                         }
 273                 } else if (!$_SESSION['valid_user']) {
 274                         if ($row['u_release_date'] > time()) {
 275                                 $msg->addError(array('COURSE_NOT_RELEASED', AT_Date(_AT('announcement_date_format'), $row['u_release_date'], AT_DATE_UNIX_TIMESTAMP)));
 276                         } else {
 277                                 $msg->addError(array('COURSE_ENDED', AT_Date(_AT('announcement_date_format'), $row['u_end_date'], AT_DATE_UNIX_TIMESTAMP)));
 278                         }
 279                         header('Location: '.AT_BASE_HREF.'browse.php');
 280                         exit;
 281
 282                 } else {
 283                         $_SESSION['course_id']    = $course;
 284                         /* check if we're an admin here */
 285                         if ($owner_id == $_SESSION['member_id']) {
 286                                 $_SESSION['is_admin'] = true;
 287                                 $_SESSION['enroll']       = AT_ENROLL_YES;
 288                         } else {
 289                                 $_SESSION['is_admin'] = false;
 290                         }
 291                 }
 292
 293                 /* title wont be needed. comes from the cache. */
 294                 $_SESSION['course_title'] = $row['title'];
 295
 296                 $sql    = "SELECT * FROM ".TABLE_PREFIX."course_enrollment WHERE member_id=$_SESSION[member_id] AND course_id=$course";
 297                 $result = mysql_query($sql, $db);
 298                 if ($row2 = mysql_fetch_assoc($result)) {
 299                         /* we have requested or are enrolled in this course */
 300                         $_SESSION['enroll'] = AT_ENROLL_YES;
 301                         $_SESSION['s_cid']  = $row2['last_cid'];
 302                         $_SESSION['privileges'] = $row2['privileges'];
 303                 }
 304
 305                 if (($row['u_release_date'] > time()) && !($_SESSION['is_admin'] || $_SESSION['privileges'])) {
 306                         $msg->addError(array('COURSE_NOT_RELEASED', AT_Date(_AT('announcement_date_format'), $row['u_release_date'], AT_DATE_UNIX_TIMESTAMP)));
 307                         header('Location: '.AT_BASE_HREF.'bounce.php?course=0');
 308                         exit;
 309                 } else if ($row['u_release_date'] > time()) {
 310                         $msg->addInfo(array('COURSE_RELEASE', AT_Date(_AT('announcement_date_format'), $row['u_release_date'], AT_DATE_UNIX_TIMESTAMP)));
 311
 312                 } else if ($row['u_end_date'] && ($row['u_end_date'] < time()) && !($_SESSION['is_admin'] || $_SESSION['privileges'])) {
 313                         $msg->addError(array('COURSE_ENDED', AT_Date(_AT('announcement_date_format'), $row['u_end_date'], AT_DATE_UNIX_TIMESTAMP)));
 314                         header('Location: '.AT_BASE_HREF.'bounce.php?course=0');
 315                         exit;
 316                 } else if ($row['u_end_date'] && $row['u_end_date'] < time()) {
 317                         $msg->addInfo(array('COURSE_ENDED', AT_Date(_AT('announcement_date_format'), $row['u_end_date'], AT_DATE_UNIX_TIMESTAMP)));
 318                 }
 319
 320                 /* add member login to counter: */
 321                 if (!$_SESSION['is_admin'] && $_SESSION['member_id'] > 0) {
 322                         count_login();
 323                 }
 324
 325                 /* update users_online  */
 326                 add_user_online();
 327
 328                 $_SESSION['groups'] = get_groups($course);
 329
 330                 header('Location: '.$dest);
 331                 exit;
 332
 333                 break;
 334
 335         case 'protected':
 336                 if (!$_SESSION['valid_user']) {
 337                         header('Location: ./login.php?course='.intval($course));
 338                         exit;
 339                 } /* else */
 340                 /* we're already logged in */
 341                 $_SESSION['course_id'] = $course;
 342
 343                 apply_category_theme($row['cat_id']);
 344
 345                 /* check if we're an admin here */
 346                 if ($owner_id == $_SESSION['member_id']) {
 347                         $_SESSION['is_admin'] = true;
 348                         $_SESSION['enroll']       = AT_ENROLL_YES;
 349                 } else {
 350                         $_SESSION['is_admin'] = false;
 351                         /* add member login to counter: */
 352                         count_login();
 353                 }
 354
 355                 $sql    = "SELECT * FROM ".TABLE_PREFIX."course_enrollment WHERE member_id=$_SESSION[member_id] AND course_id=$course";
 356                 $result = mysql_query($sql, $db);
 357                 if ($row2 = mysql_fetch_assoc($result)) {
 358                         /* we have requested or are enrolled in this course */
 359                         $_SESSION['enroll'] = AT_ENROLL_YES;
 360                         $_SESSION['s_cid']  = $row2['last_cid'];
 361                         $_SESSION['privileges'] = $row2['privileges'];
 362                 }
 363
 364                 if (($row['u_release_date'] > time()) && !($_SESSION['is_admin'] || $_SESSION['privileges'])) {
 365                         $msg->addError(array('COURSE_NOT_RELEASED', AT_Date(_AT('announcement_date_format'), $row['u_release_date'], AT_DATE_UNIX_TIMESTAMP)));
 366                         header('Location: '.AT_BASE_HREF.'bounce.php?course=0');
 367                         exit;
 368                 } else if ($row['u_release_date'] > time()) {
 369                         $msg->addInfo(array('COURSE_RELEASE', AT_Date(_AT('announcement_date_format'), $row['u_release_date'], AT_DATE_UNIX_TIMESTAMP)));
 370
 371                 } else if ($row['u_end_date'] && ($row['u_end_date'] < time()) && !($_SESSION['is_admin'] || $_SESSION['privileges'])) {
 372                         $msg->addError(array('COURSE_ENDED', AT_Date(_AT('announcement_date_format'), $row['u_end_date'], AT_DATE_UNIX_TIMESTAMP)));
 373                         header('Location: '.AT_BASE_HREF.'bounce.php?course=0');
 374                         exit;
 375                 } else if ($row['u_end_date'] && $row['u_end_date'] < time()) {
 376                         $msg->addInfo(array('COURSE_ENDED', AT_Date(_AT('announcement_date_format'), $row['u_end_date'], AT_DATE_UNIX_TIMESTAMP)));
 377                 }
 378
 379
 380                 $_SESSION['course_title'] = $row['title'];
 381
 382                 /* update users_online  */
 383                 add_user_online();
 384
 385                 $_SESSION['groups'] = get_groups($course);
 386
 387                 if ($_GET['f']) {
 388                         header('Location: ./'.$page.'?f='.$addslashes($_GET['f']));
 389                         exit;
 390                 } /* else */
 391                 header('Location: ./'.$addslashes($page));
 392                 exit;
 393
 394                 break;
 395
 396         case 'private':
 397                 if (!$_SESSION['valid_user']) {
 398                         /* user not logged in: */
 399                         header('Location: ./login.php?course='.intval($course));
 400                         exit;
 401                 } /* else */
 402
 403                 if ($owner_id == $_SESSION['member_id']) {
 404                         /* we own this course. so we dont have to enroll or get the groups */
 405
 406                         $_SESSION['is_admin']  = true;
 407                         $_SESSION['course_id'] = $course;
 408                         $_SESSION['course_title'] = $row['title'];
 409                         $_SESSION['enroll']       = AT_ENROLL_YES;
 410
 411                         $sql    = "SELECT last_cid FROM ".TABLE_PREFIX."course_enrollment WHERE member_id=$_SESSION[member_id] AND course_id=$course";
 412                         $result = mysql_query($sql, $db);
 413                         $row2 = mysql_fetch_assoc($result);
 414
 415                         $_SESSION['s_cid']  = $row2['last_cid'];
 416
 417                         /* update users_online */
 418                         add_user_online();
 419
 420                         apply_category_theme($row['cat_id']);
 421
 422                         $_SESSION['groups'] = get_groups($course);
 423
 424                         if (!empty($_GET['f'])) {
 425                                 header('Location: ./'.$page.'?f='.$addslashes($_GET['f']));
 426                                 exit;
 427                         } /* else */
 428                         if ($row['u_release_date'] > time()) {
 429                                 $msg->addInfo(array('COURSE_RELEASE', AT_Date(_AT('announcement_date_format'), $row['u_release_date'], AT_DATE_UNIX_TIMESTAMP)));
 430                         } else if ($row['u_end_date'] && $row['u_end_date'] < time()) {
 431                                 $msg->addInfo(array('COURSE_ENDED', AT_Date(_AT('announcement_date_format'), $row['u_end_date'], AT_DATE_UNIX_TIMESTAMP)));
 432                         }
 433                         header('Location: ./'.$addslashes($page));
 434                         exit;
 435                 }
 436
 437                 /* check if we're enrolled */
 438                 $sql    = "SELECT * FROM ".TABLE_PREFIX."course_enrollment WHERE member_id=$_SESSION[member_id] AND course_id=$course";
 439                 $result = mysql_query($sql, $db);
 440
 441                 if (!$row2 = mysql_fetch_assoc($result)) {
 442                         /* we have not requested enrollment in this course */
 443                         $_SESSION['course_id'] = 0;
 444                         header('Location: users/private_enroll.php?course='.intval($course));
 445                         exit;
 446                 } /* else */
 447
 448                 if (($row['u_release_date'] > time()) && !($_SESSION['is_admin'] || $_SESSION['privileges'])) {
 449                         $msg->addError(array('COURSE_NOT_RELEASED', AT_Date(_AT('announcement_date_format'), $row['u_release_date'], AT_DATE_UNIX_TIMESTAMP)));
 450                         header('Location: '.AT_BASE_HREF.'bounce.php?course=0');
 451                         exit;
 452                 } else if ($row['u_release_date'] > time()) {
 453                         $msg->addInfo(array('COURSE_RELEASE', AT_Date(_AT('announcement_date_format'), $row['u_release_date'], AT_DATE_UNIX_TIMESTAMP)));
 454
 455                 } else if ($row['u_end_date'] && ($row['u_end_date'] < time()) && !($_SESSION['is_admin'] || $_SESSION['privileges'])) {
 456                         $msg->addError(array('COURSE_ENDED', AT_Date(_AT('announcement_date_format'), $row['u_end_date'], AT_DATE_UNIX_TIMESTAMP)));
 457                         header('Location: '.AT_BASE_HREF.'bounce.php?course=0');
 458                         exit;
 459                 } else if ($row['u_end_date'] && $row['u_end_date'] < time()) {
 460                         $msg->addInfo(array('COURSE_ENDED', AT_Date(_AT('announcement_date_format'), $row['u_end_date'], AT_DATE_UNIX_TIMESTAMP)));
 461                 }
 462                 /* we have requested or are enrolled in this course */
 463
 464                 apply_category_theme($row['cat_id']);
 465
 466                 $_SESSION['enroll'] = AT_ENROLL_YES;
 467                 $_SESSION['s_cid']  = $row2['last_cid'];
 468
 469                 if ($row2['approved'] == 'n') {
 470                         /* we have not been approved to enroll in this course */
 471                         $_SESSION['course_id'] = 0;
 472                         header('Location: users/private_enroll.php?course='.$course);
 473                         exit;
 474                 } /* else */
 475
 476                 /* enrollment has been approved or student is alumni */
 477                 if ($row2['approved'] == 'a') {
 478                         $_SESSION['enroll'] = AT_ENROLL_ALUMNUS;
 479                 }
 480                 /* we're already logged in */
 481                 $_SESSION['course_id'] = $course;
 482
 483                 /* check if we're an admin here */
 484                 $_SESSION['privileges'] = $row2['privileges'];
 485                 $_SESSION['course_title'] = $row['title'];
 486
 487                 /* update users_online                  */
 488                 add_user_online();
 489
 490                 $_SESSION['groups'] = get_groups($course);
 491
 492                 /* add member login to counter: */
 493                 count_login();
 494
 495                 if($_GET['f']){
 496                         header('Location: '.$page.'?f='.$addslashes($_GET['f']));
 497                         exit;
 498                 } /* else */
 499                 header('Location: '.$addslashes($page));
 500                 exit;
 501         break;
 502 } // end switch
 503
 504
 505 ?>