_elggadmin/lib.php

   1 <?php
   2
   3     /*
   4
   5         Elgg admin panel
   6         Main library
   7
   8     */
   9
  10     // We want to load the config file whenever we can
  11         require_once("config.php");
  12
  13     // Initialisation
  14         function elggadmin_init() {
  15             global $CFG, $ADMINCFG, $messages;
  16
  17             elggadmin_session_start();
  18
  19             if (file_exists($ADMINCFG->admin->elggdir . $ADMINCFG->admin->configfile)) {
  20
  21                 // Activities to perform if Elgg's config file exists
  22
  23                 // Load Elgg configuration
  24                 global $CFG;
  25                 require_once($ADMINCFG->admin->elggdir . $ADMINCFG->admin->configfile);
  26
  27                 elggadmin_config_check_values();
  28
  29                 // Check logins etc
  30                 elggadmin_actions();
  31
  32                 // If we're not logged in, force the log in panel
  33                 if (!elggadmin_isloggedin()) {
  34
  35                     elggadmin_header();
  36                     elggadmin_begin_content();
  37                     elggadmin_loginbox();
  38                     elggadmin_end_content();
  39                     elggadmin_footer();
  40                     exit;
  41
  42                 }
  43
  44             } else {
  45
  46                 // Activities to perform if Elgg's config file doesn't exist
  47                 // Load Elgg configuration
  48                 global $CFG, $messages;
  49                 require_once($ADMINCFG->admin->elggdir . "config-dist.php");
  50
  51                 elggadmin_config_check_values();
  52
  53                 // Check logins etc
  54                 elggadmin_actions();
  55
  56                 $messages[] = <<< END
  57
  58                 <h2>Welcome to the Elgg installer!</h2>
  59                 <p>Fill in the details below, click 'Save' at the bottom, and your Elgg installation will be ready to go.
  60                 Don't worry if you don't know all the details: the really important settings (the ones Elgg won't work without)
  61                 are highlighted in red for you, and you can come back at any time by visiting {$CFG->wwwroot}_elggadmin.</p>
  62                 <p>It's possible this installer hasn't been given permission to save files to your Elgg installation directory
  63                 by the server. If that's the case, we'll give you a copy of the config.php file, and you'll need to upload it
  64                 to your installation directory by hand.</p>
  65                 <p>Of course, if you like to get your hands dirty, you can also set these values by copying config-dist.php to config.php
  66                 in your Elgg installation folder and editing it by hand in your text editor of choice.</p>
  67
  68 END;
  69
  70             }
  71         }
  72
  73         function elggadmin_actions() {
  74
  75             global $CFG, $ADMINCFG, $messages;
  76
  77             if (isset($_REQUEST['action'])) {
  78                 $action = $_REQUEST['action'];
  79             }
  80
  81             switch($action) {
  82
  83                 case "admin:login":
  84                                         elggadmin_checklogins();
  85                                         break;
  86                 case "config:save":
  87                                         elggadmin_config_save();
  88                                         break;
  89                 case "theme:save":
  90                                         elggadmin_save_template();
  91                                         break;
  92                 case "frontpage:save":
  93                                         elggadmin_save_frontpage();
  94                                         break;
  95                 case "theme:backup:save":
  96                                         elggadmin_make_backup();
  97                                         $_SESSION['messages'] = $messages;
  98                                         header("Location: theme.php");
  99                                         exit;
 100                                         break;
 101                 case "theme:backup:restore":
 102                                         elggadmin_restore_backup();
 103                                         $_SESSION['messages'] = $messages;
 104                                         header("Location: theme.php");
 105                                         exit;
 106                                         break;
 107
 108             }
 109
 110         }
 111
 112         function elggadmin_checklogins() {
 113
 114             global $CFG, $ADMINCFG, $messages;
 115
 116             $username = "";
 117             $password = "";
 118
 119             if (isset($_REQUEST['adminuser'])) {
 120                 $username = $_REQUEST['adminuser'];
 121             }
 122             if (isset($_REQUEST['adminpassword'])) {
 123                 $password = $_REQUEST['adminpassword'];
 124             }
 125
 126             if (!empty($username) && !empty($password)
 127                 && !empty($CFG->adminuser) && !empty($CFG->adminpassword) ) {
 128
 129                     if ($username == $CFG->adminuser
 130                         && $password == $CFG->adminpassword) {
 131
 132                             $_SESSION['adminid'] = 1;
 133                             $_SESSION['admincode'] = md5($CFG->adminuser . $CFG->adminpassword);
 134                             $messages[] = ("You logged in.");
 135
 136                             elggadmin_header_redirect('index.php');
 137
 138                         } else {
 139                             $messages[] = ("The username and password you specified did not match the admin details for this system.");
 140                         }
 141
 142             }
 143
 144         }
 145
 146
 147     // Initialisation for config editing
 148         function elggadmin_config_init() {
 149
 150             global $CFG, $PARSEDCFG, $ADMINCFG, $DEFCFG, $messages;
 151
 152             if (!isset($PARSEDCFG)) {
 153
 154                 $PARSEDCFG = new stdClass();
 155
 156                 foreach(get_object_vars($CFG) as $key => $value) {
 157                     $PARSEDCFG->$key = addslashes($value);
 158                 }
 159
 160             }
 161
 162             include("configdef.php");
 163             $ADMINCFG->config = $DEFCFG->config;
 164
 165
 166         }
 167
 168     // Display the form to set configuration options
 169         function elggadmin_config_main() {
 170
 171             global $CFG, $PARSEDCFG, $ADMINCFG, $messages, $DEFCFG;
 172
 173             require_once("configdef.php");
 174
 175             echo "<form action=\"\" method=\"post\">";
 176             foreach(($DEFCFG->config) as $name => $value) {
 177                 if (!in_array($name,$ADMINCFG->admin->noedit)) {
 178
 179                     //require_once("configdef.php");
 180
 181                     if (isset($DEFCFG->config[$name]->important) && $DEFCFG->config[$name]->important == true) {
 182                         echo "<div class=\"important\">";
 183                     }
 184
 185                     echo "<p>";
 186                     if (isset($ADMINCFG->config[$name]->name)) {
 187                         echo "<b>" . $ADMINCFG->config[$name]->name . "</b>";
 188                     }
 189                     if (isset($ADMINCFG->config[$name]->description)) {
 190                         echo "<br /><i>" . $ADMINCFG->config[$name]->description . "</i>";
 191                     }
 192                     echo "</p>\n";
 193                     echo "<p>";
 194
 195                     if (isset($ADMINCFG->config[$name]->type)) {
 196                         switch($ADMINCFG->config[$name]->type) {
 197
 198                             case "requiredstring":
 199                             case "integer":     echo "<input type=\"text\" name=\"$name\" value=\"" . (string) htmlspecialchars($CFG->$name) . "\" />";
 200                                                 break;
 201                             case "access":
 202                                                 $selected = array();
 203                                                 $selected[$CFG->$name] = "selected=\"selected\"";
 204                                                 echo "<select name=\"$name\">";
 205                                                 echo "<option value=\"PUBLIC\" {$selected['PUBLIC']}>" . ("Public") . "</option>";
 206                                                 echo "<option value=\"LOGGED_IN\" {$selected['LOGGED_IN']} >" . ("Logged in users only") . "</option>";
 207                                                 echo "<option value=\"PRIVATE\" {$selected['PRIVATE']} >" . ("Private") . "</option>";
 208                                                 echo "</select>";
 209                                                 break;
 210                             case "boolean":
 211                                                 $value = (int) $CFG->$name;
 212                                                 $selected = array();
 213                                                 if ($value == "1") {
 214                                                     $selected['yes'] = "selected=\"selected\"";
 215                                                 } else {
 216                                                     $selected['no'] = "selected=\"selected\"";
 217                                                 }
 218                                                 echo "<select name=\"$name\">";
 219                                                 echo "<option value=\"0\" {$selected['no']}>" . ("No") . "</option>";
 220                                                 echo "<option value=\"1\" {$selected['yes']} >" . ("Yes") . "</option>";
 221                                                 echo "</select>";
 222                                                 break;
 223
 224                         }
 225                     } else {
 226                         echo "<input type=\"text\" name=\"$name\" value=\"" . htmlspecialchars($CFG->$name) . "\" />";
 227                     }
 228
 229                     echo "</p>\n";
 230
 231                     if (isset($DEFCFG->config[$name]->important) && $DEFCFG->config[$name]->important == true) {
 232                         echo "</div>";
 233                     }
 234                 }
 235
 236             }
 237
 238             echo "<p>&nbsp;</p><p><i>" . ("Click below to save your settings.") . "</i></p>";
 239             echo "<p><input type=\"hidden\" value=\"config:save\" name=\"action\" /><input type=\"submit\" value=\"" . ("Save") . "\" /></p>";
 240             echo "</form>";
 241         }
 242
 243     // Save configuration settings to Elgg's config.php
 244         function elggadmin_config_save() {
 245
 246             global $CFG, $ADMINCFG, $PARSEDCFG, $DEFCFG, $messages;
 247
 248             $oktosave = 1;
 249             require_once("configdef.php");
 250
 251             foreach($DEFCFG->config as $name => $value) {
 252
 253                 if (!in_array($name,$ADMINCFG->admin->noedit)) {
 254                     if (isset($_REQUEST[$name])) {
 255
 256                         $CFG->$name = substr($_REQUEST[$name],0,128);
 257                         if(ini_get("magic_quotes_gpc")) {
 258                             $CFG->$name = stripslashes($CFG->$name);
 259                         }
 260
 261                     }
 262                 }
 263                         if (isset($DEFCFG->config[$name]->type)) {
 264
 265                             switch ($DEFCFG->config[$name]->type) {
 266
 267                                 case "int":
 268                                             if (empty($CFG->$name)) {
 269                                                 $CFG->$name = "0";
 270                                             }
 271                                             $CFG->$name = (int) $CFG->$name;
 272                                             break;
 273                                 case "boolean":
 274                                             if (!isset($CFG->$name)) {
 275                                                 $CFG->$name = "0";
 276                                             }
 277                                             $CFG->$name = (int) $CFG->$name;
 278                                             if ($CFG->$name > 1) {
 279                                                 $CFG->$name = "1";
 280                                             }
 281
 282                                             break;
 283                                 case "requiredstring":
 284                                             if (empty($CFG->$name)) {
 285                                                 $oktosave = 0;
 286                                                 $messages[] = sprintf(("You cannot leave '%s' blank!"),$DEFCFG->config[$name]->name);
 287                                             }
 288                                             break;
 289                                 case "access":
 290                                             if (!in_array($CFG->$name, array("PUBLIC","LOGGED_IN","PRIVATE"))) {
 291                                                 $CFG->$name = "PRIVATE";
 292                                             }
 293                                             break;
 294
 295                     }
 296                 }
 297
 298                 $PARSEDCFG->$name = addslashes($CFG->$name);
 299
 300             }
 301
 302             if ($oktosave) {
 303
 304                 $newconfigfile = elggadmin_configstring();
 305                 if (!@file_put_contents($ADMINCFG->admin->elggdir . $ADMINCFG->admin->configfile, $newconfigfile)) {
 306                     $messages[] = sprintf(("We couldn't write your new configuration to your configuration file at %s. Therefore, please copy everything from the textbox below and paste it into a new file called %s in the root of your Elgg installation."),$ADMINCFG->admin->elggdir . $ADMINCFG->admin->configfile,$ADMINCFG->admin->configfile) . "<br />" . "<textarea cols=\"40\" rows=\"6\">" . $newconfigfile . "</textarea>";
 307                 } else {
 308                     $messages[] = ("Your new configuration was saved.");
 309                 }
 310
 311             }
 312
 313             elggadmin_header_redirect('index.php');
 314
 315         }
 316
 317         /**
 318          * Starts session
 319          *
 320          */
 321         function elggadmin_session_start() {
 322             global $messages;
 323
 324             // Begin Elgg admin session
 325             session_name("elggadmin");
 326             session_start();
 327
 328             if (isset($_SESSION['messages'])) {
 329                 $messages = $_SESSION['messages'];
 330                 $_SESSION['messages'] = "";
 331             }
 332         }
 333
 334         /**
 335          * Redirect to url using header function()
 336          * @param string $url url to redirect to
 337          * @param string $message optional message to attach global messages
 338          */
 339         function elggadmin_header_redirect($url, $message='') {
 340             global $messages;
 341
 342             if (!empty($message)) {
 343                 $messages[] = $message;
 344             }
 345
 346             // save messages
 347             $_SESSION['messages'] = $messages;
 348
 349             // redirect
 350             header('Location: ' . $url);
 351             exit();
 352         }
 353
 354     // Run if Elgg's config.php doesn't exist.
 355         function elggadmin_config_create() {
 356         }
 357
 358         /**
 359          * Check for deafult values
 360          *
 361          */
 362         function elggadmin_config_check_values() {
 363             global $CFG;
 364
 365             // TODO: support for https?
 366             if (empty($CFG->wwwroot) || $CFG->wwwroot == "http://") {
 367                 $CFG->wwwroot = "http://" . str_replace("index.php","",str_replace("_elggadmin/","",$_SERVER['SERVER_NAME'].$_SERVER['REQUEST_URI']));
 368             }
 369
 370             // Set the dirroot
 371             if (empty($CFG->dirroot)) {
 372                 $CFG->dirroot = str_replace("//","/",str_replace("_elggadmin","",str_replace("\\","/",dirname(__FILE__))));
 373             }
 374
 375             // Set the templates root and profile location if they don't exist
 376             if (!isset($CFG->templatesroot)) {
 377                 $CFG->templatesroot = $CFG->dirroot . "mod/template/templates/";
 378             }
 379
 380             if (!isset($CFG->profilelocation)) {
 381                 $CFG->profilelocation = $CFG->dirroot . "mod/profile/";
 382             }
 383
 384         }
 385
 386     // Generates a string containing all the configuration options
 387     // (Essentially a filled-in version of config-dist.php)
 388         function elggadmin_configstring() {
 389
 390             global $CFG, $PARSEDCFG;
 391
 392             include("config-template.php");
 393
 394             $config = str_replace("\\\"","\"",$config);
 395
 396             return $config;
 397
 398         }
 399
 400     // Initialises theme-related functions
 401         function elggadmin_theme_init() {
 402
 403             global $CFG, $messages;
 404
 405             // Determine whether or not we can write the theme back to disk
 406             if (!is_writable($CFG->templatesroot . "Default_Template/pageshell")
 407                 || !is_writable($CFG->templatesroot . "Default_Template/css")) {
 408                     $messages[] = sprintf(("The administration panel can't write to the theme. You will need to edit your theme files directly or specify that %s is world-writable."),$CFG->templatesroot . "Default_Template/");
 409                 }
 410
 411             if (file_exists($CFG->dataroot) &&
 412                 (!file_exists($CFG->dataroot . "backuppageshell") || !file_exists($CFG->dataroot . "backupcss"))
 413                 ) {
 414                 elggadmin_make_backup();
 415             }
 416
 417         }
 418
 419     // Initialises theme-related functions
 420         function elggadmin_frontpage_init() {
 421
 422             global $CFG, $messages;
 423
 424             // Determine whether or not we can write the theme back to disk
 425             if (!is_writable($CFG->templatesroot . "Default_Template/frontpage_loggedin")
 426                 || !is_writable($CFG->templatesroot . "Default_Template/frontpage_loggedout")) {
 427                     $messages[] = sprintf(("The administration panel can't write to the front page template. You will need to edit your front page files directly or specify that %s is world-writable."),$CFG->templatesroot . "Default_Template/");
 428                 }
 429
 430         }
 431
 432     // Takes a backup
 433         function elggadmin_make_backup() {
 434
 435             global $CFG, $messages;
 436
 437             if (!@copy($CFG->templatesroot . "Default_Template/pageshell", $CFG->dataroot . "backuppageshell")) {
 438                 $messages[] = ("Could not backup pageshell.");
 439             }
 440             if (!@copy($CFG->templatesroot . "Default_Template/css", $CFG->dataroot . "backupcss")) {
 441                 $messages[] = ("Could not backup css.");
 442             }
 443
 444         }
 445
 446     // Restores from a backup
 447         function elggadmin_restore_backup() {
 448
 449             global $CFG, $messages;
 450
 451             if (!@copy($CFG->dataroot . "backuppageshell", $CFG->templatesroot . "Default_Template/pageshell")) {
 452                 $messages[] = ("Could not restore pageshell backup.");
 453             }
 454             if (!@copy($CFG->dataroot . "backupcss", $CFG->templatesroot . "Default_Template/css")) {
 455                 $messages[] = ("Could not restore css backup.");
 456             }
 457
 458         }
 459
 460     // Save template
 461         function elggadmin_save_template() {
 462
 463             global $CFG, $ADMINCFG, $messages;
 464             if (isset($_REQUEST['pageshell']) && isset($_REQUEST['css'])) {
 465
 466                 if (is_writable($CFG->templatesroot . "Default_Template/pageshell")
 467                     && is_writable($CFG->templatesroot . "Default_Template/css")) {
 468
 469                     $pageshell = trim($_REQUEST['pageshell']);
 470                     $css = trim($_REQUEST['css']);
 471
 472                     if(ini_get("magic_quotes_gpc")) {
 473                         $pageshell = stripslashes($pageshell);
 474                         $css = stripslashes($css);
 475                     }
 476
 477                     if (!@file_put_contents($CFG->templatesroot . "Default_Template/pageshell",$pageshell)) {
 478                         $messages[] = ("Could not save pageshell.");
 479                     } else {
 480                         $messages[] = ("Pageshell saved.");
 481                     }
 482                     if (!@file_put_contents($CFG->templatesroot . "Default_Template/css",$css)) {
 483                         $messages[] = ("Could not save CSS.");
 484                     } else {
 485                         $messages[] = ("CSS saved.");
 486                     }
 487
 488                 } else {
 489
 490                     $messages[] = sprintf(("The admin panel doesn't have the right to save to pageshell and css at %s. You may wish to speak to your system administrator about granting write access to those files."),$CFG->templatesroot . "Default_Template/");
 491
 492                 }
 493
 494                 elggadmin_header_redirect('theme.php');
 495
 496             }
 497
 498         }
 499
 500     // Save frontpage
 501         function elggadmin_save_frontpage() {
 502
 503             global $CFG, $ADMINCFG, $messages;
 504             if (isset($_REQUEST['frontpage_loggedout']) && isset($_REQUEST['frontpage_loggedin'])) {
 505
 506                 if (is_writable($CFG->templatesroot . "Default_Template/frontpage_loggedout")
 507                     && is_writable($CFG->templatesroot . "Default_Template/frontpage_loggedin")) {
 508
 509                     $frontpage_loggedout = trim($_REQUEST['frontpage_loggedout']);
 510                     $frontpage_loggedin = trim($_REQUEST['frontpage_loggedin']);
 511
 512                     if(ini_get("magic_quotes_gpc")) {
 513                         $frontpage_loggedout = stripslashes($frontpage_loggedout);
 514                         $frontpage_loggedin = stripslashes($frontpage_loggedin);
 515                     }
 516
 517                     if (!@file_put_contents($CFG->templatesroot . "Default_Template/frontpage_loggedout",$frontpage_loggedout)) {
 518                         $messages[] = ("Could not save frontpage_loggedout.");
 519                     } else {
 520                         $messages[] = ("frontpage_loggedout saved.");
 521                     }
 522                     if (!@file_put_contents($CFG->templatesroot . "Default_Template/frontpage_loggedin",$frontpage_loggedin)) {
 523                         $messages[] = ("Could not save frontpage_loggedin.");
 524                     } else {
 525                         $messages[] = ("frontpage_loggedin saved.");
 526                     }
 527
 528                 } else {
 529
 530                     $messages[] = sprintf(("The admin panel doesn't have the right to save to frontpage_loggedout and frontpage_loggedin at %s. You may wish to speak to your system administrator about granting write access to those files."),$CFG->templatesroot . "Default_Template/");
 531
 532                 }
 533
 534                 elggadmin_header_redirect('frontpage.php');
 535
 536             }
 537
 538         }
 539
 540     // Displays the main form to edit themes
 541         function elggadmin_theme_main() {
 542
 543             global $CFG, $messages;
 544
 545             echo "<form action=\"\" method=\"post\">";
 546
 547             echo "<p><b>" . ("Main pageshell") . "</b></p>";
 548
 549             echo "<textarea name=\"pageshell\" >";
 550             readfile($CFG->templatesroot . "Default_Template/pageshell");
 551             echo "</textarea>";
 552
 553             echo "<p><b>" . ("CSS styles") . "</b></p>";
 554
 555             echo "<textarea name=\"css\" >";
 556             readfile($CFG->templatesroot . "Default_Template/css");
 557             echo "</textarea>";
 558
 559             echo "<p>&nbsp;</p><p><i>" . ("Click below to save your settings.") . "</i></p>";
 560             echo "<p><input type=\"hidden\" value=\"theme:save\" name=\"action\" /><input type=\"submit\" value=\"" . ("Save") . "\" /></p>";
 561             echo "</form>";
 562
 563             echo "<form action=\"\" method=\"post\">";
 564             echo "<p><i>" . ("Only press the button below if you're sure this theme works!") . "</i></p>";
 565             echo "<p><input type=\"hidden\" value=\"theme:backup:save\" name=\"action\" /><input type=\"submit\" value=\"" . ("Save a backup") . "\" /></p>";
 566             echo "</form>";
 567
 568             if (file_exists($CFG->dataroot . "backuppageshell") && file_exists($CFG->dataroot . "backupcss")) {
 569
 570                 echo "<form action=\"\" method=\"post\">";
 571                 echo "<p><i>" . ("Click to restore your last saved backup:") . "</i></p>";
 572                 echo "<p><input type=\"hidden\" value=\"theme:backup:restore\" name=\"action\" /><input type=\"submit\" value=\"" . ("Restore from backup") . "\" /></p>";
 573                 echo "</form>";
 574
 575             }
 576
 577         }
 578
 579     // Displays the main form to edit front pages
 580         function elggadmin_frontpage_main() {
 581
 582             global $CFG, $messages;
 583
 584             echo "<form action=\"\" method=\"post\">";
 585
 586             echo "<p><b>" . ("Front page (when logged out)") . "</b></p>";
 587
 588             echo "<textarea name=\"frontpage_loggedout\" >";
 589             readfile($CFG->templatesroot . "Default_Template/frontpage_loggedout");
 590             echo "</textarea>";
 591
 592             echo "<p><b>" . ("Front page (when logged in)") . "</b></p>";
 593
 594             echo "<textarea name=\"frontpage_loggedin\" >";
 595             readfile($CFG->templatesroot . "Default_Template/frontpage_loggedin");
 596             echo "</textarea>";
 597
 598             echo "<p>&nbsp;</p><p><i>" . ("Click below to save your settings.") . "</i></p>";
 599             echo "<p><input type=\"hidden\" value=\"frontpage:save\" name=\"action\" /><input type=\"submit\" value=\"" . ("Save") . "\" /></p>";
 600             echo "</form>";
 601
 602
 603         }
 604
 605     // Checks to see if we're logged into the admin panel or not.
 606         function elggadmin_isloggedin() {
 607
 608             global $CFG;
 609             if ($_SESSION['adminid'] != -1
 610                 && $_SESSION['admincode'] == md5($CFG->adminuser . $CFG->adminpassword)
 611                 && !empty($CFG->adminuser) && !empty($CFG->adminpassword)
 612                 && !empty($_SESSION['adminid'])) {
 613
 614                     return true;
 615
 616             }
 617
 618             return false;
 619
 620         }
 621
 622     // Displays navigation
 623         function elggadmin_navigation($current_page) {
 624
 625             global $ADMINCFG;
 626
 627             $current[$current_page] = "class=\"active\"";
 628
 629             if (file_exists($ADMINCFG->admin->elggdir . $ADMINCFG->admin->configfile)) {
 630
 631             echo <<< END
 632             <div id="navigation"><!-- start navigation -->
 633                 <ul>
 634                     <li><a href="index.php" {$current['config']}>Site configuration</a></li>
 635                     <li><a href="theme.php" {$current['theme']}>Site theme</a></li>
 636                     <li><a href="frontpage.php" {$current['frontpage']}>Front page</a></li>
 637                     <!-- <li><a href="profile.php" {$current['profile']}>Profile fields</a></li>
 638                     <li><a href="plugins.php" {$current['plugins']}>Plugins</a></li> -->
 639                 </ul>
 640             </div>
 641 END;
 642
 643             }
 644
 645         }
 646
 647         function elggadmin_begin_content() {
 648             echo "<div id=\"content\">\n";
 649         }
 650         function elggadmin_end_content() {
 651             echo "</div>\n";
 652         }
 653
 654     // Displays a login box, if admin logins have been defined in Elgg's config.php.
 655     // (Assumes, at this stage, that Elgg's config.php actually exists.)
 656         function elggadmin_loginbox() {
 657
 658             global $CFG;
 659
 660             if (!empty($CFG->adminuser) && !empty($CFG->adminpassword)) {
 661
 662                 echo "<h1>" . ("Please log in") . "</h1>";
 663                 echo "<p>" . ("Log in with your admin username and password below.") . "</p>";
 664                 echo "<form action=\"\" method=\"post\">\n";
 665                 echo "<table border=\"0\">\n";
 666                 echo "<tr><td><p>" . ("Username:") . "</p></td><td><p><input type=\"text\" name=\"adminuser\" value=\"\" /></p></td></tr>\n";
 667                 echo "<tr><td><p>" . ("Password:") . "</p></td><td><p><input type=\"password\" name=\"adminpassword\" value=\"\" /></p></td></tr>\n";
 668                 echo "<tr><td colspan=\"2\"><p><input type=\"hidden\" name=\"action\" value=\"admin:login\" /><input type=\"submit\" value=\"" . ("Log in") . "\" /></p></td></tr>\n";
 669                 echo "</table>\n";
 670
 671             } else {
 672
 673                 echo "<h1>" . ("Admin login not defined") . "</h1>";
 674                 echo "<p>" . ("Before you use the admin panel, you will need to add the following code to Elgg's config.php:") . "</p>";
 675                 echo "<textarea rows=\"4\" cols=\"40\">\n\n\$CFG->adminuser = '';\n\$CFG->adminpassword = '';</textarea>";
 676                 echo "<p>" . ("The values for \$CFG->adminuser and \$CFG->adminpassword cannot be left blank.") . "</p>";
 677
 678             }
 679
 680         }
 681
 682     // Displays a header for the admin panel
 683         function elggadmin_header() {
 684
 685             global $messages;
 686             echo file_get_contents("HEADER");
 687             if (!empty($messages) && is_array($messages)) {
 688                 echo "<div id=\"messages\"><ul>\n";
 689                 foreach($messages as $message) {
 690                     echo "<li>" . $message . "</li>\n";
 691                 }
 692                 echo "</ul></div>\n";
 693             }
 694
 695         }
 696
 697     // Displays a footer for the admin panel
 698         function elggadmin_footer() {
 699
 700             echo file_get_contents("FOOTER");
 701
 702         }
 703
 704 ?>