kernel.php

   1 <?php
   2 /*=====================================================================*\
   3 || ###################################################################
   4 || # Iris Studios Shared Object Framework [#]version[#]
   5 || # Copyright ©2002-[#]year[#] Iris Studios, Inc.
   6 || #
   7 || # This program is free software; you can redistribute it and/or modify
   8 || # it under the terms of the GNU General Public License as published by
   9 || # the Free Software Foundation; version [#]gpl[#] of the License.
  10 || #
  11 || # This program is distributed in the hope that it will be useful, but
  12 || # WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
  13 || # or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
  14 || # more details.
  15 || #
  16 || # You should have received a copy of the GNU General Public License along
  17 || # with this program; if not, write to the Free Software Foundation, Inc.,
  18 || # 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA
  19 || ###################################################################
  20 \*=====================================================================*/
  21
  22 /**
  23 * Iris Studios Shared Object Framework Kernel
  24 * kernel.php
  25 *
  26 * @package      ISSO
  27 */
  28
  29 if (!function_exists('version_compare'))
  30 {
  31         trigger_error('You need PHP version 4.1.0 or newer to run ISSO', E_USER_ERROR);
  32         exit;
  33 }
  34
  35 if (version_compare(PHP_VERSION, '5.0.0', '>='))
  36 {
  37         if (ini_get('error_reporting') & E_NOTICE)
  38         {
  39                 error_reporting(ini_get('error_reporting') - E_NOTICE);
  40         }
  41         if (ini_get('error_reporting') & E_USER_NOTICE)
  42         {
  43                 error_reporting(ini_get('error_reporting') - E_USER_NOTICE);
  44         }
  45 }
  46
  47 $oldlevel = ini_get('error_reporting');
  48 $newlevel = $oldlevel;
  49 $levels = array(E_ERROR => E_USER_ERROR, E_WARNING => E_USER_WARNING, E_NOTICE => E_USER_NOTICE);
  50 foreach ($levels AS $php => $isso)
  51 {
  52         if ($oldlevel & $php)
  53         {
  54                 if (!($oldlevel & $isso))
  55                 {
  56                         $newlevel += $isso;
  57                 }
  58         }
  59         else
  60         {
  61                 if ($oldlevel & $isso)
  62                 {
  63                         $newlevel -= $isso;
  64                 }
  65         }
  66 }
  67 error_reporting($newlevel);
  68
  69 if ((bool)ini_get('register_globals') === true)
  70 {
  71         $superglobals = array('_GET', '_COOKIE', '_FILES', '_POST', '_SERVER', '_ENV');
  72         foreach ($superglobals AS $global)
  73         {
  74                 if (is_array(${$global}))
  75                 {
  76                         foreach (${$global} AS $_key => $_val)
  77                         {
  78                                 if (isset(${$_key}))
  79                                 {
  80                                         unset(${$_key});
  81                                 }
  82                         }
  83                 }
  84         }
  85 }
  86
  87 /**#@+
  88 * Input cleaning type constant
  89 */
  90 /**
  91 * Integer type
  92 */
  93 define('TYPE_INT', 1);
  94
  95 /**
  96 * Unsigned integer
  97 */
  98 define('TYPE_UINT', 2);
  99
 100 /**
 101 * Float type
 102 */
 103 define('TYPE_FLOAT', 4);
 104
 105 /**
 106 * Boolean type
 107 */
 108 define('TYPE_BOOL', 8);
 109
 110 /**
 111 * String - cleaned
 112 */
 113 define('TYPE_STR', 16);
 114
 115 /**
 116 * String - deliberate unclean
 117 */
 118 define('TYPE_STRUN', 32);
 119
 120 /**
 121 * No cleaning - here for use in API
 122 */
 123 define('TYPE_NOCLEAN', 64);
 124 /**#@-*/
 125
 126 /**
 127 * Yes, required
 128 */
 129 define('REQ_YES', 1);
 130
 131 /**
 132 * No, not required
 133 */
 134 define('REQ_NO', 0);
 135
 136 /**
 137 * Iris Studios Shared Object Framework (ISSO)
 138 *
 139 * This framework allows a common backend to be used amongst all Iris
 140 * Studios applications and is built to be abstract and flexible.
 141 * The base framework handles all loading and module management.
 142 *
 143 * Constants:
 144 *               ISSO_NO_INPUT_SANITIZE - Disables the automatic input sanitizer
 145 *               ISSO_CHECK_POST_REFERER - Will check to make sure that on POSTed
 146 *                                                                       data, the referer matches the host
 147 *
 148 * @author               Iris Studios, Inc.
 149 * @copyright    Copyright ©2002 - [#]year[#], Iris Studios, Inc.
 150 * @version              $Revision$
 151 * @package              ISSO
 152 *
 153 */
 154 class Shared_Object_Framework
 155 {
 156         /**
 157         * ISSO version
 158         * @var  string
 159         */
 160         var $version = '[#]version[#]';
 161
 162         /**
 163         * Location of ISSO, used for internal linking
 164         * @var  string
 165         */
 166         var $sourcepath = '';
 167
 168         /**
 169         * Path of the current application
 170         * @var  string
 171         */
 172         var $apppath = '';
 173
 174         /**
 175         * Web path used to get the web location of the installation of ISSO; only used for Printer module
 176         * @var  string
 177         */
 178         var $webpath = '';
 179
 180         /**
 181         * Name of the current application
 182         * @var  string
 183         */
 184         var $application = '';
 185
 186         /**
 187         * Version of the current application
 188         * @var  string
 189         */
 190         var $appversion = '';
 191
 192         /**
 193         * Whether debug mode is on or off
 194         * @var  bool
 195         */
 196         var $debug = false;
 197
 198         /**
 199         * List of all active debug messages
 200         * @var  array
 201         */
 202         var $debuginfo = array();
 203
 204         /**
 205         * List of loaded modules
 206         * @var  array
 207         */
 208         var $modules = array();
 209
 210         /**
 211         * An array of sanitized variables that have been cleaned for HTML tag openers and double quotes
 212         * @var  array
 213         */
 214         var $in = array();
 215
 216         /**
 217         * If we are running with magic_quotes_gpc on or off
 218         * @var  int
 219         */
 220         var $magicquotes = 0;
 221
 222         /**
 223         * Array of user-specified fields that are required for ISSO initialization
 224         * fieldname => array(REQUIRED, CALLBACK PARSER, SET)
 225         * @var  array
 226         */
 227         var $fields = array(
 228                 'sourcepath'    => array(REQ_YES,       'fetch_sourcepath', false),
 229                 'apppath'               => array(REQ_YES,       'fetch_sourcepath',     false),
 230                 'webpath'               => array(REQ_YES,       'fetch_sourcepath',     false),
 231                 'application'   => array(REQ_YES,       null,                           false),
 232                 'appversion'    => array(REQ_NO,        null,                           false),
 233                 'debug'                 => array(REQ_NO,        null,                           false)
 234         );
 235
 236         // ###################################################################
 237         /**
 238         * Constructor
 239         */
 240         function __construct()
 241         {
 242                 $GLOBALS['isso:null-framework'] = null;
 243
 244                 // error reporting
 245                 set_error_handler(array(&$this, '_error_handler'));
 246
 247                 // magic quotes
 248                 $this->magicquotes = get_magic_quotes_gpc();
 249                 set_magic_quotes_runtime(0);
 250
 251                 // start input sanitize using variable_order GPC
 252                 if (!defined('ISSO_NO_INPUT_SANITIZE'))
 253                 {
 254                         $this->exec_sanitize_data();
 255                 }
 256
 257                 if (defined('ISSO_CHECK_POST_REFERER'))
 258                 {
 259                         $this->exec_referer_check();
 260                 }
 261         }
 262
 263         // ###################################################################
 264         /**
 265         * (PHP 4) Constructor
 266         */
 267         function Shared_Object_Framework()
 268         {
 269                 $this->__construct();
 270         }
 271
 272         // ###################################################################
 273         /**
 274         * Sets a specified field in the ISSO. This is used to set all the
 275         * required fields that ISSO uses for linking. It replaces the old
 276         * method of setting the instance variables directly.
 277         *
 278         * @access       public
 279         *
 280         * @param        string  Field name
 281         * @param        mixed   Value of the field
 282         */
 283         function set($fieldname, $value)
 284         {
 285                 if (is_array($this->fields["$fieldname"]))
 286                 {
 287                         if (method_exists($this, $this->fields["$fieldname"][1]))
 288                         {
 289                                 $value = $this->{$this->fields["$fieldname"][1]}($value);
 290                         }
 291
 292                         $this->$fieldname = $value;
 293
 294                         $this->fields["$fieldname"][2] = true;
 295                 }
 296                 else
 297                 {
 298                         trigger_error('Invalid field `' . $fieldname . '` specified in ISSO->set()', E_USER_ERROR);
 299                 }
 300         }
 301
 302         // ###################################################################
 303         /**
 304         * Returns the value of an ISSO field. You should not access any instance
 305         * variables directly, use this instead.
 306         *
 307         * @access       public
 308         *
 309         * @param        string  Field name
 310         *
 311         * @return       mixed   Value of the field
 312         */
 313         function get($fieldname)
 314         {
 315                 if (is_array($this->fields["$fieldname"]))
 316                 {
 317                         if ($this->fields["$fieldname"][2] == false)
 318                         {
 319                                 trigger_error('Field `' . $fieldname . '` is not set and therefore cannot ISSO->get()', E_USER_ERROR);
 320                         }
 321
 322                         return $this->$fieldname;
 323                 }
 324                 else
 325                 {
 326                         trigger_error('Invalid field `' . $fieldname . '` specified in ISSO->get()', E_USER_ERROR);
 327                 }
 328         }
 329
 330         // ###################################################################
 331         /**
 332         * Prepares a path for being set as the sourcepath
 333         *
 334         * @access       public
 335         *
 336         * @param        string  Source path or URL
 337         *
 338         * @return       string  Prepared source path
 339         */
 340         function fetch_sourcepath($source)
 341         {
 342                 if (substr($source, strlen($source) - 1) != DIRECTORY_SEPARATOR)
 343                 {
 344                         $source .= DIRECTORY_SEPARATOR;
 345                 }
 346                 return $source;
 347         }
 348
 349         // ###################################################################
 350         /**
 351         * Loads a framework module
 352         *
 353         * @access       public
 354         *
 355         * @param        string  Name of the framework file to load
 356         * @param        string  Internal variable to initialize as; to not instantiate (just require) leave it as NULL
 357         * @param        bool    Globalize the internal variable?
 358         *
 359         * @return       object  Instantiated instance
 360         */
 361         function &load($framework, $asobject, $globalize = false)
 362         {
 363                 // set the object interlock
 364                 if (!method_exists($GLOBALS['isso:null-framework'], 'load'))
 365                 {
 366                         $GLOBALS['isso:null-framework'] =& $this;
 367                 }
 368
 369                 if ($this->is_loaded($framework))
 370                 {
 371                         return $this->modules["$framework"];
 372                 }
 373
 374                 if ($this->sourcepath == '')
 375                 {
 376                         trigger_error('Invalid sourcepath specified', E_USER_ERROR);
 377                 }
 378
 379                 if (file_exists($this->sourcepath . $framework . '.php'))
 380                 {
 381                         require_once($this->sourcepath . $framework . '.php');
 382                 }
 383                 else
 384                 {
 385                         trigger_error('Could not find the framework ' . $this->sourcepath . $framework . '.php', E_USER_ERROR);
 386                 }
 387
 388                 if ($asobject === null)
 389                 {
 390                         return;
 391                 }
 392
 393                 if (isset($this->$asobject))
 394                 {
 395                         trigger_error('Cannot instantiate framework `' . $framework . '` into `' . $asobject . '`', E_USER_ERROR);
 396                 }
 397
 398                 $this->$asobject = new $framework($this);
 399
 400                 $this->modules["$framework"] =& $this->$asobject;
 401
 402                 if ($globalize)
 403                 {
 404                         $GLOBALS["$asobject"] =& $this->$asobject;
 405                 }
 406
 407                 return $this->$asobject;
 408         }
 409
 410         // ###################################################################
 411         /**
 412         * Prints a list of all currently loaded framework modules
 413         *
 414         * @access       public
 415         *
 416         * @param        bool    Return the data as an array?
 417         *
 418         * @return       mixed   HTML output or an array of loaded modules
 419         */
 420         function show_modules($return = false)
 421         {
 422                 foreach ($this->modules AS $object)
 423                 {
 424                         $modules[] = get_class($object);
 425                 }
 426
 427                 if ($return)
 428                 {
 429                         return $modules;
 430                 }
 431                 else
 432                 {
 433                         $output = "\n\n<ul>\n\t<li>";
 434                         $output .= implode("</li>\n\t<li>", $modules);
 435                         $output .= "</li>\n</ul>\n\n";
 436                         $this->message('Loaded Modules', $output, 1);
 437                 }
 438         }
 439
 440         // ###################################################################
 441         /**
 442         * Verifies to see if a framework has been loaded
 443         *
 444         * @access       public
 445         *
 446         * @param        string  Framework name
 447         *
 448         * @return       bool    Whether or not the framework has been loaded
 449         */
 450         function is_loaded($framework)
 451         {
 452                 if (isset($this->modules["$framework"]))
 453                 {
 454                         return true;
 455                 }
 456                 else
 457                 {
 458                         return false;
 459                 }
 460         }
 461
 462         // ###################################################################
 463         /**
 464         * Prints an ISSO message
 465         *
 466         * @access       public
 467         *
 468         * @param        string  The title of the message
 469         * @param        string  The content of the message
 470         * @param        integer Type of message to be printed
 471         * @param        bool    Return the output?
 472         * @param        bool    Show the debug stack?
 473         *
 474         * @return       mixed   Output or null
 475         */
 476         function message($title, $message, $type, $return = false, $stack = true)
 477         {
 478                 switch ($type)
 479                 {
 480                         // Message
 481                         case 1:
 482                                 $prefix = 'Message';
 483                                 $color = '#669900';
 484                                 $font = '#000000';
 485                         break;
 486
 487                         // Warning
 488                         case 2:
 489                                 $prefix = 'Warning';
 490                                 $color = '#003399';
 491                                 $font = '#FFFFFF';
 492                         break;
 493
 494                         case 3:
 495                                 $prefix = 'Error';
 496                                 $color = '#990000';
 497                                 $font = '#EFEFEF';
 498                         break;
 499                 }
 500
 501                 $backtrace = debug_backtrace();
 502                 unset($backtrace[0]);
 503
 504                 $output = "\n<br />\n<table cellpadding=\"4\" cellspacing=\"1\" border=\"0\" width=\"500\" style=\"background-color: $color; color: black; font-family: Verdana, sans-serif; font-size: 12px;\">";
 505                 $output .= "\n<tr style=\"color: $font; text-align: left\">\n\t<td><strong>$prefix: $title</strong></td>\n</tr>";
 506                 $output .= "\n<tr style=\"background-color: #FFFFFF; text-align: left\">\n\t<td>$message</td>\n</tr>";
 507                 $output .= (($stack AND $GLOBALS['isso:null-framework']->debug) ? "\n<tr style=\"background-color: #FFFFFF; text-align: left\">\n\t<td><strong>Debug Stack:</strong> <pre>" . print_r($backtrace, true) . "</pre></td>\n</tr>" : '');
 508                 $output .= "\n</table>\n<br />\n";
 509
 510                 if ($return)
 511                 {
 512                         return $output;
 513                 }
 514                 else
 515                 {
 516                         print($output);
 517                 }
 518         }
 519
 520         // ###################################################################
 521         /**
 522         * Custom error handler for ISSO; only handle E_WARNING, E_NOTICE,
 523         * E_USER_ERROR, E_USER_WARNING, E_USER_NOTICE
 524         *
 525         * @access       private
 526         *
 527         * @param        integer Error number
 528         * @param        string  Error message string
 529         * @param        string  File that contains the error
 530         * @param        string  The line number of the error
 531         * @param        string  The active symbol table at which point the error occurred
 532         */
 533         function _error_handler($errno, $errstr, $errfile, $errline)
 534         {
 535                 switch ($errno)
 536                 {
 537                         // Fatal
 538                         case E_USER_ERROR:
 539                                 $title = 'Fatal';
 540                                 $level = 3;
 541                                 if (!(ini_get('error_reporting') & E_USER_ERROR))
 542                                 {
 543                                         return;
 544                                 }
 545                         break;
 546
 547                         // Error
 548                         case E_USER_WARNING:
 549                                 $title = 'Warning';
 550                                 $level = 2;
 551                                 if (!(ini_get('error_reporting') & E_USER_WARNING) AND !(ini_get('error_reporting') & E_WARNING))
 552                                 {
 553                                         return;
 554                                 }
 555                         break;
 556
 557                         // Warning
 558                         case E_USER_NOTICE:
 559                         default:
 560                                 $title = 'Notice';
 561                                 $level = 1;
 562                                 if (!(ini_get('error_reporting') & E_USER_NOTICE) AND !(ini_get('error_reporting') & E_NOTICE))
 563                                 {
 564                                         return;
 565                                 }
 566                         break;
 567                 }
 568
 569                 $errstr .= " in <strong>$errfile</strong> on line <strong>$errline</strong>";
 570
 571                 $errstr = str_replace(array(getcwd(), dirname(getcwd())), '', $errstr);
 572
 573                 $this->message($title, $errstr, $level);
 574
 575                 if ($errno == E_USER_ERROR)
 576                 {
 577                         exit;
 578                 }
 579         }
 580
 581         // ###################################################################
 582         /**
 583         * Creates a table that explains the error reporting levels and their
 584         * state
 585         *
 586         * @access       public
 587         */
 588         function explain_error_reporting()
 589         {
 590                 $levels = array(
 591                         'E_ERROR'                       => E_ERROR,
 592                         'E_WARNING'                     => E_WARNING,
 593                         'E_PARSE'                       => E_PARSE,
 594                         'E_NOTICE'                      => E_NOTICE,
 595                         'E_CORE_ERROR'          => E_CORE_ERROR,
 596                         'E_CORE_WARNING'        => E_CORE_WARNING,
 597                         'E_COMPILE_ERROR'       => 64,
 598                         'E_COMPILE_WARNING'     => 128,
 599                         'E_USER_ERROR'          => E_USER_ERROR,
 600                         'E_USER_WARNING'        => E_USER_WARNING,
 601                         'E_USER_NOTICE'         => E_USER_NOTICE,
 602                         'E_ALL'                         => E_ALL,
 603                         'E_STRICT'                      => 2048
 604                 );
 605
 606                 $table = '<table cellspacing="0" cellpadding="2" border="0">';
 607
 608                 foreach ($levels AS $name => $value)
 609                 {
 610                         $table .= '
 611                         <tr>
 612                                 <td>' . $name . '</td>
 613                                 <td>' . (ini_get('error_reporting') & $value) . '</td>
 614                         </tr>';
 615                 }
 616
 617                 $table .= '
 618                 </table>';
 619
 620                 $this->message('Error Reporting', $table, 1);
 621         }
 622
 623         // ###################################################################
 624         /**
 625         * Logs a debug message for verbose output
 626         *
 627         * @access       public
 628         *
 629         * @param        string  Message
 630         */
 631         function debug($message)
 632         {
 633                 $this->debuginfo[] = $message;
 634         }
 635
 636         // ###################################################################
 637         /**
 638         * Recursive XSS cleaner
 639         *
 640         * @access       private
 641         *
 642         * @param        mixed   Unsanitized REQUEST data
 643         *
 644         * @return       mixed   Sanitized data
 645         */
 646         function _sanitize_input_recursive($data)
 647         {
 648                 foreach ($data AS $key => $value)
 649                 {
 650                         if (is_array($value))
 651                         {
 652                                 $data["$key"] = $this->_sanitize_input_recursive($value);
 653                         }
 654                         else
 655                         {
 656                                 $data["$key"] = $this->sanitize($value);
 657                         }
 658                 }
 659                 return $data;
 660         }
 661
 662         // ###################################################################
 663         /**
 664         * Simple way to protect against HTML attacks with Unicode support
 665         *
 666         * @access       public
 667         *
 668         * @param        string  Unsanitzed text
 669         *
 670         * @return       string  Properly protected text that only encodes potential threats
 671         */
 672         function sanitize($text)
 673         {
 674                 if ($this->magicquotes)
 675                 {
 676                         return str_replace(array('<', '>', '\"', '"'), array('&lt;', '&gt;', '&quot;', '&quot;'), $text);
 677                 }
 678                 else
 679                 {
 680                         return str_replace(array('<', '>', '"'), array('&lt;', '&gt;', '&quot;'), $text);
 681                 }
 682         }
 683
 684         // ###################################################################
 685         /**
 686         * Unicode-safe entity encoding system; similar to sanitize()
 687         *
 688         * @access       public
 689         *
 690         * @param        string  Unsanitized text
 691         *
 692         * @return       string  Unicode-safe sanitized text with entities preserved
 693         */
 694         function entity_encode($text)
 695         {
 696                 $text = str_replace('&', '&amp;', $text);
 697                 $text = $this->sanitize($text);
 698                 return $text;
 699         }
 700
 701         // ###################################################################
 702         /**
 703         * Takes text that has been processed for HTML and unsanitizes it
 704         *
 705         * @access       public
 706         *
 707         * @param        string  Text that needs to be turned back into HTML
 708         *
 709         * @return       string  Unsanitized text
 710         */
 711         function unsanitize($text)
 712         {
 713                 return str_replace(array('&lt;', '&gt;', '&quot;'), array('<', '>', '"'), $text);
 714         }
 715
 716         // ###################################################################
 717         /**
 718         * Smart addslashes() that only applies itself it the Magic Quotes GPC
 719         * is off. This should only be run on database query values.
 720         *
 721         * @access       public
 722         *
 723         * @param        string  Some string
 724         * @param        bool    If the data is binary; if so it'll be run through DB::escape_stringing()
 725         * @param        bool    Force magic quotes to be off
 726         *
 727         * @return       string  String that has slashes added
 728         */
 729         function escape($str, $binary = false, $force = true)
 730         {
 731                 if ($this->magicquotes AND !$force)
 732                 {
 733                         if (isset($this->modules[ISSO_DB_LAYER]) AND $binary)
 734                         {
 735                                 return $this->modules[ISSO_DB_LAYER]->escape_string(str_replace(array("\'", '\"'), array("'", '"'), $str));
 736                         }
 737                         return $str;
 738                 }
 739                 else
 740                 {
 741                         if (isset($this->modules[ISSO_DB_LAYER]) AND $binary)
 742                         {
 743                                 return $this->modules[ISSO_DB_LAYER]->escape_string($str);
 744                         }
 745                         return addslashes($str);
 746                 }
 747         }
 748
 749         // ###################################################################
 750         /**
 751         * Runs through all of the input data and sanitizes it.
 752         *
 753         * @access       public
 754         */
 755         function exec_sanitize_data()
 756         {
 757                 $this->in = $this->_sanitize_input_recursive(array_merge($_GET, $_POST, $_COOKIE));
 758         }
 759
 760         // ###################################################################
 761         /**
 762         * Sanitize function for something other than a string (which
 763         * everything is sanitized for if you use exec_sanitize_data(). Cleaned
 764         * data is placed back into $isso->in; this makes it so you don't have
 765         * to constantly intval() [etc.] data.
 766         *
 767         * @access       public
 768         *
 769         * @param        array   Array of elements to clean as varname => type
 770         */
 771         function input_clean_array($vars)
 772         {
 773                 foreach ($vars AS $varname => $type)
 774                 {
 775                         $this->input_clean($varname, $type);
 776                 }
 777         }
 778
 779         // ###################################################################
 780         /**
 781         * Sanitize function that does a single variable as oppoesd to an array
 782         * (see input_clean_array() for more details)
 783         *
 784         * @access       public
 785         *
 786         * @param        string  Variable name in $isso->in[]
 787         * @param        integer Sanitization type constant
 788         */
 789         function input_clean($varname, $type)
 790         {
 791                 if (isset($this->in["$varname"]))
 792                 {
 793                         $this->in["$varname"] = $this->clean($this->in["$varname"], $type);
 794                 }
 795                 else
 796                 {
 797                         $this->in["$varname"] = null;
 798                 }
 799
 800                 return $this->in["$varname"];
 801         }
 802
 803         // ###################################################################
 804         /**
 805         * Cleaning function that does the work for input_clean(); this is
 806         * moved here so it can be used to clean things that aren't in
 807         * $isso->in[]
 808         *
 809         * @access       public
 810         *
 811         * @param        mixed   Data
 812         * @param        integer Sanitization type constant
 813         *
 814         * @return       mixed   Cleaned data
 815         */
 816         function clean($value, $type)
 817         {
 818                 if ($type == TYPE_INT)
 819                 {
 820                         $value = intval($value);
 821                 }
 822                 else if ($type == TYPE_UINT)
 823                 {
 824                         $value = abs(intval($value));
 825                 }
 826                 else if ($type == TYPE_FLOAT)
 827                 {
 828                         $value = floatval($value);
 829                 }
 830                 else if ($type == TYPE_BOOL)
 831                 {
 832                         $value = (bool)$value;
 833                 }
 834                 else if ($type == TYPE_STR)
 835                 {
 836                         $value = $value;
 837                 }
 838                 else if ($type == TYPE_STRUN)
 839                 {
 840                         $value = $this->unsanitize($value);
 841                 }
 842                 else if ($type == TYPE_NOCLEAN)
 843                 {
 844                         $value = $value;
 845                 }
 846                 else
 847                 {
 848                         trigger_error('Invalid clean type `' . $type . '` specified', E_USER_ERROR);
 849                 }
 850
 851                 return $value;
 852         }
 853
 854         // ###################################################################
 855         /**
 856         * Checks to see if a POST refer is actually from us
 857         *
 858         * @access       public
 859         */
 860         function exec_referer_check()
 861         {
 862                 if ($_SERVER['REQUEST_METHOD'] == 'POST')
 863                 {
 864                         $host = ($_SERVER['HTTP_HOST']) ? $_SERVER['HTTP_HOST'] : $_ENV['HTTP_HOST'];
 865
 866                         if ($host AND $_SERVER['HTTP_REFERER'])
 867                         {
 868                                 $parts = parse_url($_SERVER['HTTP_REFERER']);
 869                                 $ourhost = $parts['host'] . (isset($parts['port']) ? ":$parts[port]" : '');
 870
 871                                 if ($ourhost != $host)
 872                                 {
 873                                         trigger_error('No external hosts are allowed to POST to this application', E_USER_ERROR);
 874                                 }
 875                                 $this->debug('remote post check = ok');
 876                         }
 877                         else
 878                         {
 879                                 $this->debug('remote post check = FAILED');
 880                         }
 881                 }
 882         }
 883
 884         // ###################################################################
 885         /**
 886         * Constructs a debug information box that contains various debugging
 887         * information points
 888         *
 889         * @access       public
 890         *
 891         * @param        bool    Show template information?
 892         *
 893         * @return       string  Debugging block
 894         */
 895         function construct_debug_block($dotemplates)
 896         {
 897                 $debug = '';
 898
 899                 if ($this->debug)
 900                 {
 901                         $debug = "\n<ul>";
 902
 903                         // templates
 904                         if ($dotemplates)
 905                         {
 906                                 // both template and template_fs are viable, so we need to determine the right one
 907                                 if ($this->is_loaded('template'))
 908                                 {
 909                                         $tpl_obj =& $this->modules['template'];
 910                                 }
 911                                 else if ($this->is_loaded('template_fs'))
 912                                 {
 913                                         $tpl_obj =& $this->modules['template_fs'];
 914                                 }
 915                                 else
 916                                 {
 917                                         $tpl_obj = null;
 918                                 }
 919
 920                                 $optlist = array();
 921                                 $usage = array();
 922                                 foreach ($tpl_obj->usage AS $name => $count)
 923                                 {
 924                                         if (in_array($name, $tpl_obj->uncached))
 925                                         {
 926                                                 $optlist[] = $name . '[' . $count . ']';
 927                                         }
 928                                         $usage[] = $name . " ($count)";
 929                                 }
 930
 931                                 $sizeof = sizeof($tpl_obj->uncached);
 932                                 if ($sizeof > 0)
 933                                 {
 934                                         $debug .= "\n\t<li><strong style=\"color: red\">Uncached Template(s):</strong> $sizeof ( " . implode(' &nbsp; ', $optlist) . " )</li>";
 935                                 }
 936                         }
 937
 938                         // source control
 939                         $scinfo = 'Not Under Source Control';
 940                         if (defined('SVN'))
 941                         {
 942                                 $scinfo = constant('SVN');
 943
 944                                 if (preg_match('#\$Id:?\s*\$#', $scinfo))
 945                                 {
 946                                         $scinfo = 'Not Under Source Control';
 947                                 }
 948                                 else
 949                                 {
 950                                         $scinfo = preg_replace('#\$' . '(Head)?URL: (.+?) \$#e', "end(explode('/', '\\2'))", $scinfo);
 951                                         $scinfo = preg_replace('#\$' . '(LastModified)?Revision: (.+?) \$#', 'SVN \\2', $scinfo);
 952                                         $scinfo = preg_replace('#\$' . 'Id: (.+?) ([0-9].+?) [0-9]{4}-[0-9]{2}-[0-9]{2} [0-9]{2}:[0-9]{2}:[0-9]{2}(.+?) (.+?) \$#', '\\1 - SVN \\2', $scinfo);
 953                                 }
 954                         }
 955
 956                         $scinfo = trim($scinfo);
 957                         $debug .= "\n\t<li><strong>Source Control:</strong> $scinfo</li>";
 958
 959                         // query information
 960                         if (is_object($this->modules[ISSO_DB_LAYER]))
 961                         {
 962                                 $debug .= "\n\t<li><strong>Total Queries:</strong> " . sizeof($this->modules[ISSO_DB_LAYER]->history) . " (<a href=\"" . $this->sanitize($_SERVER['REQUEST_URI']) . ((strpos($_SERVER['REQUEST_URI'], '?') !== false) ? '&amp;query=1' : '?query=1') . "\">?</a>)</li>";
 963                         }
 964
 965                         // total execution time
 966                         if (defined('ISSO_MT_START'))
 967                         {
 968                                 $this->load('functions', 'functions');
 969                                 $debug .= "\n\t<li><strong>Total Execution Time:</strong> " . round($this->modules['functions']->fetch_microtime_diff(ISSO_MT_START), 10) . "</li>";
 970                         }
 971
 972                         // debug notices
 973                         $debug .= "\n\t<li>\n\t\t<select>\n\t\t\t<option>Debug Notices (" . sizeof($this->debuginfo) . ")</option>";
 974                         foreach ((array)$this->debuginfo AS $msg)
 975                         {
 976                                 $debug .= "\n\t\t\t<option>--- $msg</option>";
 977                         }
 978                         $debug .= "\n\t\t</select>\n\t</li>";
 979
 980                         // loaded modules
 981                         $modules = $this->show_modules(true);
 982                         $debug .= "\n\t<li>\n\t\t<select>\n\t\t\t<option>Loaded Modules (" . sizeof($modules) . ")</option>";
 983                         foreach ($modules AS $mod)
 984                         {
 985                                 $debug .= "\n\t\t\t<option>--- $mod</option>";
 986                         }
 987                         $debug .= "\n\t\t</select>\n\t</li>";
 988
 989                         // template usage
 990                         if ($dotemplates)
 991                         {
 992                                 $debug .= "\n\t<li>\n\t\t<select>\n\t\t\t<option>Template Usage (" . array_sum($tpl_obj->usage) . ")</option>";
 993                                 foreach ($usage AS $tpl)
 994                                 {
 995                                         $debug .= "\n\t\t\t<option>--- $tpl</option>";
 996                                 }
 997                                 $debug .= "\n\t\t</select>\n\t</li>";
 998                         }
 999
1000                         $debug .= "\n</ul>";
1001
1002                         $debug = "\n\n<!-- dev debug -->\n<div align=\"center\">\n\n<hr />\n" . $this->message('Debug Information', $debug, 1, true, false) . "\n</div>\n<!-- / dev debug -->\n\n";
1003                 }
1004
1005                 return $debug;
1006         }
1007 }
1008
1009 /*=====================================================================*\
1010 || ###################################################################
1011 || # $HeadURL$
1012 || # $Id$
1013 || ###################################################################
1014 \*=====================================================================*/
1015 ?>