developer/Samples/Bot/admin/index.php

   1 <?PHP
   2 /***************************************
   3   * http://www.program-o.com
   4   * PROGRAM O
   5   * Version: 2.5.3
   6   * FILE: index.php
   7   * AUTHOR: Elizabeth Perreau and Dave Morton
   8   * DATE: FEB 01 2016
   9   * DETAILS: Gateway to the admin functions for the script
  10   ***************************************/
  11
  12   $thisFile = __FILE__;
  13   if (!file_exists('../config/global_config.php')) header('location: ../install/install_programo.php');
  14   require_once('../config/global_config.php');
  15
  16   // set up error logging and display
  17   ini_set('log_errors', true);
  18   ini_set('error_log', _LOG_PATH_ . 'admin.error.log');
  19   ini_set('html_errors', false);
  20   ini_set('display_errors', false);
  21   set_exception_handler("handle_exceptions");
  22
  23   //load shared files
  24   require_once(_LIB_PATH_ . 'PDO_functions.php');
  25   require_once(_LIB_PATH_ . 'error_functions.php');
  26   require_once(_LIB_PATH_ . 'misc_functions.php');
  27   require_once(_LIB_PATH_ . 'template.class.php');
  28   require_once(_ADMIN_PATH_ . 'allowedPages.php');
  29
  30   // Set session parameters
  31   $session_name = 'PGO_Admin';
  32   session_name($session_name);
  33   session_start();
  34   $msg = '';
  35
  36   // Get form inputs
  37   $pc = print_r($_GET, true) . "\n" . print_r($_POST, true);
  38   $page = filter_input(INPUT_GET, 'page', FILTER_SANITIZE_STRING);
  39   $page = ($page === false || $page === null) ? 'main' : $page;
  40   if (!array_key_exists($page, $allowed_pages))
  41   {
  42     $msg = 'Invalid argument!';
  43   }
  44   $filters = $allowed_pages[$page];
  45   $post_vars = filter_input_array(INPUT_POST, $filters);
  46   $get_vars = filter_input_array(INPUT_GET, $filters);
  47   $input_vars = array_merge((array) $get_vars, (array) $post_vars);
  48
  49   // Set default values
  50   $bot_name = '<b class="red">not selected</b>';
  51   $hide_logo = '';
  52   $curPage = '';
  53
  54   // Begin script execution
  55   $thisPath = dirname(__FILE__);
  56   $template = new Template("$thisPath/default.page.htm");
  57   $githubVersion = getCurrentVersion();
  58   $version = ($githubVersion == VERSION) ? 'Program O version ' . VERSION : 'Program O ' . $githubVersion . ' is now available. <a href="https://github.com/Program-O/Program-O/archive/master.zip">Click here</a> to download it.';
  59   $dbConn = db_open();
  60   if ($get_vars['page'] == 'logout') logout();
  61   $logged_in = getLoginStatus();
  62   $curPage = 'logout';
  63   switch ($logged_in)
  64   {
  65     case true:
  66       $curPage = (isset($get_vars['page'])) ? $get_vars['page'] : 'main';
  67       break;
  68     default:
  69       $curPage = ($get_vars['page'] == 'login') ? login() : 'logout';
  70   }
  71
  72       $name       = (isset($_SESSION['poadmin']['name'])) ? $_SESSION['poadmin']['name'] : '';
  73       $ip         = (isset($_SESSION['poadmin']['ip'])) ? $_SESSION['poadmin']['ip'] : '';
  74       $last       = (isset($_SESSION['poadmin']['last_login'])) ? $_SESSION['poadmin']['last_login'] : '';
  75       $lip        = (isset($_SESSION['poadmin']['lip'])) ? $_SESSION['poadmin']['lip'] : '';
  76       $llast      = (isset($_SESSION['poadmin']['prior_login'])) ? $_SESSION['poadmin']['prior_login'] : '';
  77       $bot_name   = (isset($_SESSION['poadmin']['bot_name'])) ? $_SESSION['poadmin']['bot_name'] : $bot_name;
  78       $bot_id     = (isset($_SESSION['poadmin']['bot_id'])) ? $_SESSION['poadmin']['bot_id'] : 1;
  79       $hide_logo  = (isset($_SESSION['display'])) ? $_SESSION['display'] : '';
  80       $bot_format = (isset($_SESSION['poadmin']['bot_format'])) ? $_SESSION['poadmin']['bot_format'] : '';
  81
  82
  83 # Build page sections
  84 # ordered here in the order that the page is constructed
  85   $logo            = $template->getSection('Logo');
  86   $titleSpan       = $template->getSection('TitleSpan');
  87   $main            = $template->getSection('Main');
  88   $divDecoration   = '';
  89   $mainContent     = $template->getSection('LoginForm');
  90   $noLeftNav       = $template->getSection('NoLeftNav');
  91   $noRightNav      = $template->getSection('NoRightNav');
  92   $navHeader       = $template->getSection('NavHeader');
  93   $footer          = $template->getSection('Footer');
  94   $topNav          = '';
  95   $leftNav         = '';
  96   $rightNav        = '';
  97   $rightNavLinks   = '';
  98   $lowerScripts    = $template->getSection('LogoLinkScript');
  99   $pageTitleInfo   = '';
 100   $topNavLinks     = makeLinks('top', makeTopLinks());
 101   $leftNavLinks    = makeLinks('left', makeLeftLinks());
 102   $mediaType       = ' media="screen"';
 103   $mainTitle       = 'Program O Login';
 104   $FooterInfo      = '<p>&copy; 2011-2014 My Program-O<br /><a href="http://www.program-o.com">www.program-o.com</a></p>';
 105   $headerTitle     = '';
 106   $pageTitle       = 'My-Program O - Login';
 107   $upperScripts    = '';
 108   $extraCSS = '';
 109
 110
 111     //if we get to the login page and we are still actually logged in
 112     //just destroy the session to prevent weirdness
 113     if($curPage == 'login' && !empty($_SESSION['poadmin']['logged_in'])){
 114         $_SESSION = array();
 115     }
 116
 117   $_SESSION['poadmin']['curPage'] = $curPage;
 118   ($curPage != 'logout' || $curPage == 'login') ? include ("$curPage.php") : false;
 119
 120   $bot_format_link = (!empty($bot_format)) ? "&amp;format=$bot_format" : '';
 121   $curPage = (isset($curPage)) ? $curPage : 'main';
 122   $upperScripts .= ($hide_logo == 'HideLogoCSS') ? $template->getSection('HideLogoCSS') : '';
 123
 124
 125
 126
 127   # Build page content from the template
 128
 129   $content  = $template->getSection('Header');
 130   #$content .= "hide_logo = $hide_logo";
 131   $content .= $template->getSection('PageBody');
 132
 133   # Replace template labels with real data
 134   $styleSheet = 'style.css';
 135   $errMsgClass   = (!empty($msg)) ? "ShowError" : "HideError";
 136   $errMsgStyle   = $template->getSection($errMsgClass);
 137   $bot_id = ($bot_id == 'new') ? 0 : $bot_id;
 138   $searches = array(
 139                     '[charset]'         => $charset,
 140                     '[myPage]'          => $curPage,
 141                     '[pageTitle]'       => $pageTitle,
 142                     '[styleSheet]'      => $styleSheet,
 143                     '[mediaType]'       => $mediaType,
 144                     '[extraCSS]'        => $extraCSS,
 145                     '[upperScripts]'    => $upperScripts,
 146                     '[logo]'            => $logo,
 147                     '[pageTitleInfo]'   => $pageTitleInfo,
 148                     '[topNav]'          => $topNav,
 149                     '[leftNav]'         => $leftNav,
 150                     '[rightNav]'        => $rightNav,
 151                     '[main]'            => $main,
 152                     '[footer]'          => $footer,
 153                     '[lowerScripts]'    => $lowerScripts,
 154                     '[titleSpan]'       => $titleSpan,
 155                     '[divDecoration]'   => $divDecoration,
 156                     '[topNavLinks]'     => $topNavLinks,
 157                     '[navHeader]'       => $navHeader,
 158                     '[leftNavLinks]'    => $leftNavLinks,
 159                     '[mainTitle]'       => $mainTitle,
 160                     '[mainContent]'     => $mainContent,
 161                     '[rightNavLinks]'   => $rightNavLinks,
 162                     '[FooterInfo]'      => $FooterInfo,
 163                     '[headerTitle]'     => $headerTitle,
 164                     '[errMsg]'          => $msg,
 165                     '[bot_id]'          => $bot_id,
 166                     '[bot_name]'        => $bot_name,
 167                     '[errMsgStyle]'     => $errMsgStyle,
 168                     '[noRightNav]'      => $noRightNav,
 169                     '[noLeftNav]'       => $noLeftNav,
 170                     '[version]'         => $version,
 171                     '[bot_format_link]' => $bot_format_link,
 172                    );
 173   foreach ($searches as $search => $replace) {
 174     $content = str_replace($search, $replace, $content);
 175   }
 176   $content = str_replace('[myPage]', $curPage, $content);
 177   $content = str_replace('[divDecoration]', $divDecoration, $content);
 178   $content = str_replace('[blank]', '', $content);
 179
 180   session_gc();
 181   exit($content);
 182
 183   /**
 184    * Function makeLinks
 185    *
 186    * * @param $section
 187    * @param     $linkArray
 188    * @return string
 189    */
 190   function makeLinks($section, $linkArray) {
 191     $out = "<!-- making links for section $section -->\n";
 192     global $template, $curPage;
 193     $curPage = (empty($curPage)) ? 'main' : $curPage;
 194     $botName = (isset($_SESSION['poadmin']['bot_name'])) ? $_SESSION['poadmin']['bot_name'] : '<b class="red">not selected</b>';
 195     $botId = (isset($_SESSION['poadmin']['bot_id'])) ? $_SESSION['poadmin']['bot_id'] : 1;
 196     $botId = ($botId == 'new') ? 1 : $botId;
 197     # [linkClass][linkHref][linkOnclick][linkAlt][linkTitle]>[linkLabel]
 198     $linkText = $template->getSection('NavLink');
 199     foreach ($linkArray as $needle) {
 200       $tmp = $linkText;
 201       foreach ($needle as $search => $replace) {
 202         $tmp = str_replace($search, $replace, $tmp);
 203       }
 204       $linkClass = $needle['[linkHref]'];
 205       $linkClass = str_replace(' href="index.php?page=', '', $linkClass);
 206       $linkClass = str_replace('"', '', $linkClass);
 207       $curClass = ($linkClass == $curPage) ? 'selected' : 'noClass';
 208       if ($curPage == 'main') $curClass = (stripos($linkClass,'main') !== false) ? 'selected' : 'noClass';
 209       $tmp = str_replace('[curClass]', $curClass, $tmp);
 210       $out .= "$tmp\n";
 211     }
 212     #print "<!-- returning links for section $section:\n\n out = $out\n\n -->\n";
 213     $strippedBotName = preg_replace('~\<b class="red"\>(.*?)\</b\>~', '$1', $botName);
 214     $out = str_replace('[botId]', $botId, $out);
 215     $out = str_replace('[curBot]', $botName, $out);
 216     $out = str_replace('[curBot2]', $strippedBotName, $out);
 217     return trim($out);
 218   }
 219
 220
 221
 222   /**
 223    * Function makeTopLinks
 224    *
 225    *
 226    * @return array
 227    */
 228   function makeTopLinks() {
 229     $out = array(
 230
 231                          array(
 232                                '[linkClass]' => ' class="[curClass]"',
 233                                '[linkHref]' => ' href="'.DOCS_URL.'"',
 234                                '[linkOnclick]' => '',
 235                                '[linkAlt]' => ' alt="The Program O User\'s Guide"',
 236                                '[linkTitle]' => ' title="The Program O User\'s Guide"',
 237                                '[linkLabel]' => 'Documentation'
 238                                ),
 239                          array(
 240                                '[linkClass]' => ' class="[curClass]"',
 241                                '[linkHref]' => ' href="https://github.com/Program-O/Program-O/issues"',
 242                                '[linkOnclick]' => '',
 243                                '[linkAlt]' => ' alt="Bug reporting"',
 244                                '[linkTitle]' => ' title="Bug reporting"',
 245                                '[linkLabel]' => 'Bug Reporting'
 246                                ),
 247                          array(
 248                                '[linkClass]' => ' class="[curClass]"',
 249                                '[linkHref]' => ' href="index.php?page=stats"',
 250                                '[linkOnclick]' => '',
 251                                '[linkAlt]' => ' alt="Get bot statistics"',
 252                                '[linkTitle]' => ' title="Get bot statistics"',
 253                                '[linkLabel]' => 'Stats'
 254                                ),
 255                          array(
 256                                '[linkClass]' => '',
 257                                '[linkHref]' => ' href="index.php?page=logout"',
 258                                '[linkOnclick]' => '',
 259                                '[linkAlt]' => ' alt="Log out"',
 260                                '[linkTitle]' => ' title="Log out"',
 261                                '[linkLabel]' => 'Log Out'
 262                                )
 263                         );
 264     return $out;
 265   }
 266
 267   /**
 268    * Function makeLeftLinks
 269    *
 270    *
 271    * @return array
 272    */
 273   function makeLeftLinks() {
 274     $out = array(
 275                  array( # Change bot
 276                        '[linkClass]' => ' class="[curClass]"',
 277                        '[linkHref]' => ' href="index.php?page=select_bots"',
 278                        '[linkOnclick]' => '',
 279                        '[linkAlt]' => ' alt="Change or edit the current bot"',
 280                        '[linkTitle]' => ' title="Change or edit the current bot"',
 281                        '[linkLabel]' => 'Current Bot: ([curBot])'
 282                  ),
 283                  array(
 284                        '[linkClass]' => ' class="[curClass]"',
 285                        '[linkHref]' => ' href="index.php?page=botpersonality"',
 286                        '[linkOnclick]' => '',
 287                        '[linkAlt]' => ' alt="Edit your bot\'s personality"',
 288                        '[linkTitle]' => ' title="Edit your bot\'s personality"',
 289                        '[linkLabel]' => 'Bot Personality'
 290                  ),
 291                  array(
 292                        '[linkClass]' => ' class="[curClass]"',
 293                        '[linkHref]' => ' href="index.php?page=logs"',
 294                        '[linkOnclick]' => '',
 295                        '[linkAlt]' => ' alt="View the log files"',
 296                        '[linkTitle]' => ' title="View the log files"',
 297                        '[linkLabel]' => 'Logs'
 298                  ),
 299                  array(
 300                        '[linkClass]' => ' class="[curClass]"',
 301                        '[linkHref]' => ' href="index.php?page=teach"',
 302                        '[linkOnclick]' => '',
 303                        '[linkAlt]' => ' alt="Train your bot"',
 304                        '[linkTitle]' => ' title="Train your bot"',
 305                        '[linkLabel]' => 'Teach'
 306                  ),
 307                  array(
 308                        '[linkClass]' => ' class="[curClass]"',
 309                        '[linkHref]' => ' href="index.php?page=upload"',
 310                        '[linkOnclick]' => '',
 311                        '[linkAlt]' => ' alt="Upload AIML files"',
 312                        '[linkTitle]' => ' title="Upload AIML files"',
 313                        '[linkLabel]' => 'Upload AIML'
 314                  ),
 315                  array(
 316                        '[linkClass]' => ' class="[curClass]"',
 317                        '[linkHref]' => ' href="index.php?page=download"',
 318                        '[linkOnclick]' => '',
 319                        '[linkAlt]' => ' alt="Download AIML files"',
 320                        '[linkTitle]' => ' title="Download AIML files"',
 321                        '[linkLabel]' => 'Download AIML'
 322                  ),
 323                  array(
 324                        '[linkClass]' => ' class="[curClass]"',
 325                        '[linkHref]' => ' href="index.php?page=clear"',
 326                        '[linkOnclick]' => '',
 327                        '[linkAlt]' => ' alt="Clear AIML Categories"',
 328                        '[linkTitle]' => ' title="Clear AIML Categories"',
 329                        '[linkLabel]' => 'Clear AIML Categories'
 330                  ),
 331                  array(
 332                        '[linkClass]' => ' class="[curClass]"',
 333                        '[linkHref]' => ' href="index.php?page=spellcheck"',
 334                        '[linkOnclick]' => '',
 335                        '[linkAlt]' => ' alt="Edit the SpellCheck entries"',
 336                        '[linkTitle]' => ' title="Edit the SpellCheck entries"',
 337                        '[linkLabel]' => 'Spell Check'
 338                  ),
 339                  array(
 340                        '[linkClass]' => ' class="[curClass]"',
 341                        '[linkHref]' => ' href="index.php?page=wordcensor"',
 342                        '[linkOnclick]' => '',
 343                        '[linkAlt]' => ' alt="Edit the Word Censor entries"',
 344                        '[linkTitle]' => ' title="Edit the Word Censor entries"',
 345                        '[linkLabel]' => 'Word Censor'
 346                  ),
 347                  array(
 348                        '[linkClass]' => ' class="[curClass]"',
 349                        '[linkHref]' => ' href="index.php?page=editAiml"',
 350                        '[linkOnclick]' => '',
 351                        '[linkAlt]' => ' alt="Search and edit specific AIML categories"',
 352                        '[linkTitle]' => ' title="Search and edit specific AIML categories"',
 353                        '[linkLabel]' => 'Search/Edit AIML'
 354                  ),
 355                  array(
 356                        '[linkClass]' => ' class="[curClass]"',
 357                        '[linkHref]' => ' href="index.php?page=srai_lookup"',
 358                        '[linkOnclick]' => '',
 359                        '[linkAlt]' => ' alt="Search and edit entries in the srai_lookup table"',
 360                        '[linkTitle]' => ' title="Search and edit entries in the srai_lookup table"',
 361                        '[linkLabel]' => 'SRAI Lookup'
 362                  ),
 363                  array(
 364                        '[linkClass]' => ' class="[curClass]"',
 365                        '[linkHref]' => ' href="index.php?page=demochat"',
 366                        '[linkOnclick]' => '',
 367                        '[linkAlt]' => ' alt="Run a demo version of your bot"',
 368                        '[linkTitle]' => ' title="Run a demo version of your bot"',
 369                        '[linkLabel]' => 'Test Your Bot'
 370                  ),
 371                  array(
 372                        '[linkClass]' => '',
 373                        '[linkHref]' => ' href="index.php?page=members"',
 374                        '[linkOnclick]' => '',
 375                        '[linkAlt]' => ' alt="Edit Admin Accounts"',
 376                        '[linkTitle]' => ' title="Edit Admin Accounts"',
 377                        '[linkLabel]' => 'Edit Admin Accounts'
 378                  ),
 379                  array(
 380                        '[linkClass]' => '',
 381                        '[linkHref]' => ' href="index.php?page=logout"',
 382                        '[linkOnclick]' => '',
 383                        '[linkAlt]' => ' alt="Log out"',
 384                        '[linkTitle]' => ' title="Log out"',
 385                        '[linkLabel]' => 'Log Out'
 386                  ),
 387                  array(
 388                        '[linkClass]' => '',
 389                        '[linkHref]' => ' href="#"',
 390                        '[linkOnclick]' => ' onclick="toggleLogo(); return false;"',
 391                        '[linkAlt]' => ' alt="Toggle the Logo"',
 392                        '[linkTitle]' => ' title="Toggle the Logo"',
 393                        '[linkLabel]' => 'Toggle the Logo'
 394                  ),
 395                  array(
 396                        '[linkClass]' => '',
 397                        '[linkHref]' => ' href="' . _BASE_URL_ . '?bot_id=[botId][bot_format_link]"',
 398                        '[linkOnclick]' => ' target="_blank"',
 399                        '[linkAlt]' => ' alt="open the page for [curBot] in a new tab/window"',
 400                        '[linkTitle]' => ' title="open the page for [curBot2] in a new tab/window"',
 401                        '[linkLabel]' => 'Talk to [curBot]'
 402                  )
 403     );
 404     return $out;
 405   }
 406
 407
 408
 409   /**
 410    * Function getCurrentVersion
 411    *
 412    *
 413    * @return bool|mixed|string
 414    */
 415   function getCurrentVersion()
 416   {
 417     if(isset($_SESSION['GitHubVersion'])) return $_SESSION['GitHubVersion'];
 418     $url = 'https://api.github.com/repos/Program-O/Program-O/contents/version.txt';
 419     $out = false;
 420     if (function_exists('curl_init'))
 421     {
 422       $ch = curl_init();
 423       curl_setopt($ch, CURLOPT_URL, $url);
 424       curl_setopt($ch, CURLOPT_SSL_VERIFYPEER, false);
 425       curl_setopt($ch, CURLOPT_RETURNTRANSFER, true);
 426       curl_setopt($ch, CURLOPT_USERAGENT, 'Program-O/Program-O');
 427       $out = curl_exec($ch);
 428       //if (false === $out) trigger_error('Not sure what it is, but there\'s a problem with checking the current version on GitHub. Maybe this will help: "' . curl_error($ch) . '"');
 429       curl_close($ch);
 430       if (false === $out) return VERSION;
 431       $repoArray = json_decode($out, true);
 432       //save_file(_LOG_PATH_ . 'repoArray.txt', print_r($repoArray, true));
 433       if (!isset($repoArray['content'])) return VERSION;
 434       $versionB64 = $repoArray['content'];
 435       $version = base64_decode($versionB64);
 436       #save_file(_DEBUG_PATH_ . 'version.txt', "out = " . print_r($out, true) . "\r\nVersion = $versionB64 = $version");
 437       $out = $version;
 438     }
 439     $_SESSION['GitHubVersion'] = $out;
 440     return ($out !== false) ? $out : VERSION;
 441   }
 442
 443   /**
 444    * Function handle_exceptions
 445    *
 446    * * @param exception $e
 447    * @return void
 448    */
 449   function handle_exceptions(exception $e)
 450   {
 451     global $msg;
 452     $trace = $e->getTrace();
 453     file_put_contents(_LOG_PATH_ . 'admin.exception.log', print_r($trace, true), FILE_APPEND);
 454     $msg .= $e->getMessage();
 455     return 'logout';
 456   }
 457
 458   function login ()
 459   {
 460     global $post_vars, $get_vars, $dbConn, $msg;
 461     if((!isset($post_vars['user_name'])) ||(!isset($post_vars['pw']))) return 'logout';
 462     //$_SESSION['poadmin']['display'] = $hide_logo;
 463     $user_name = $post_vars['user_name'];
 464     $pw_hash = md5($post_vars['pw']);
 465     $sql = "SELECT * FROM `myprogramo` WHERE user_name = :user_name AND password = :pw_hash";
 466     $params = array(':user_name' => $user_name, ':pw_hash' => $pw_hash);
 467     $row = db_fetch($sql, $params, __FILE__, __FUNCTION__, __LINE__);
 468     if(!empty($row)) {
 469       $_SESSION['poadmin']['uid'] = $row['id'];
 470       $_SESSION['poadmin']['name'] = $row['user_name'];
 471       $_SESSION['poadmin']['lip']=$row['last_ip'];
 472       $_SESSION['poadmin']['prior_login']=date('l jS \of F Y h:i:s A', strtotime($row['last_login']));
 473       switch (true)
 474       {
 475         case (!empty($_SERVER['HTTP_CLIENT_IP'])):
 476           $ip = $_SERVER['HTTP_CLIENT_IP'];
 477           break;
 478         case (!empty($_SERVER['HTTP_X_FORWARDED_FOR'])):
 479           $ip = $_SERVER['HTTP_X_FORWARDED_FOR'];
 480           break;
 481         default:
 482           $ip = $_SERVER['REMOTE_ADDR'];
 483       }
 484
 485       $sql = "UPDATE `myprogramo` SET `last_ip` = :ip, `last_login` = CURRENT_TIMESTAMP WHERE user_name = :user_name limit 1";
 486       $params = array(':ip' => $ip, ':user_name' => $user_name);
 487       $transact = db_write($sql, $params, false, __FILE__, __FUNCTION__, __LINE__);
 488       $_SESSION['poadmin']['ip'] = $ip;
 489       $_SESSION['poadmin']['last_login'] = date('l jS \of F Y h:i:s A');
 490
 491       $sql = "SELECT * FROM `bots` WHERE bot_active = '1' ORDER BY bot_id ASC LIMIT 1";
 492       $row = db_fetch($sql, null, __FILE__, __FUNCTION__, __LINE__);
 493       $count = count($row);
 494       if($count > 0) {
 495         $_SESSION['poadmin']['bot_id'] = $row['bot_id'];
 496         $_SESSION['poadmin']['bot_name'] = $row['bot_name'];
 497       }
 498       else {
 499         $_SESSION['poadmin']['bot_id'] = -1;
 500         $_SESSION['poadmin']['bot_name'] = "unknown";
 501       }
 502     }
 503     else {
 504       $msg .= "incorrect username/password<br>\n";
 505     }
 506     if (empty($msg))
 507     {
 508       $_SESSION['poadmin']['logged_in'] = true;
 509       header('Location: index.php');
 510       return 'main';
 511     }
 512     return 'logout';
 513   }
 514
 515   function logout()
 516   {
 517     global $session_name, $session_cookie_domain, $session_cookie_path;
 518     $_SESSION = array();
 519     session_destroy();
 520     setcookie($session_name, '', time()-3600, $session_cookie_path, $session_cookie_domain, false, false);
 521     header('Location: ./');
 522     exit();
 523   }
 524
 525   function getLoginStatus()
 526   {
 527     return (isset($_SESSION['poadmin']['logged_in']) && $_SESSION['poadmin']['logged_in'] === true) ? true : false;
 528   }