kernel.php

   1 <?php
   2 /*=====================================================================*\
   3 || ###################################################################
   4 || # Blue Static ISSO Framework [#]issoversion[#]
   5 || # Copyright ©2002-[#]year[#] Blue Static
   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 * Blue Static ISSO 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 // when we are PHP5-nat instead of PHP5-compat, we can remove this
  36 if (version_compare(PHP_VERSION, '5.0.0', '>='))
  37 {
  38         if (ini_get('error_reporting') & E_NOTICE)
  39         {
  40                 error_reporting(ini_get('error_reporting') - E_NOTICE);
  41         }
  42         if (ini_get('error_reporting') & E_USER_NOTICE)
  43         {
  44                 error_reporting(ini_get('error_reporting') - E_USER_NOTICE);
  45         }
  46 }
  47
  48 if ((bool)ini_get('register_globals') === true)
  49 {
  50         $superglobals = array('_GET', '_COOKIE', '_FILES', '_POST', '_SERVER', '_ENV');
  51         foreach ($superglobals AS $global)
  52         {
  53                 if (is_array(${$global}))
  54                 {
  55                         foreach (${$global} AS $_key => $_val)
  56                         {
  57                                 if (isset(${$_key}))
  58                                 {
  59                                         unset(${$_key});
  60                                 }
  61                         }
  62                 }
  63         }
  64 }
  65
  66 $oldlevel = ini_get('error_reporting');
  67 $newlevel = $oldlevel;
  68 $levels = array(E_ERROR => E_USER_ERROR, E_WARNING => E_USER_WARNING, E_NOTICE => E_USER_NOTICE);
  69 foreach ($levels AS $php => $isso)
  70 {
  71         if ($oldlevel & $php)
  72         {
  73                 if (!($oldlevel & $isso))
  74                 {
  75                         $newlevel += $isso;
  76                 }
  77         }
  78         else
  79         {
  80                 if ($oldlevel & $isso)
  81                 {
  82                         $newlevel -= $isso;
  83                 }
  84         }
  85 }
  86 error_reporting($newlevel);
  87
  88 /**#@+
  89 * Input cleaning type constant
  90 */
  91 /**
  92 * Integer type
  93 */
  94 define('TYPE_INT', 1);
  95
  96 /**
  97 * Unsigned integer
  98 */
  99 define('TYPE_UINT', 2);
 100
 101 /**
 102 * Float type
 103 */
 104 define('TYPE_FLOAT', 4);
 105
 106 /**
 107 * Boolean type
 108 */
 109 define('TYPE_BOOL', 8);
 110
 111 /**
 112 * String - cleaned
 113 */
 114 define('TYPE_STR', 16);
 115
 116 /**
 117 * String - deliberate unclean
 118 */
 119 define('TYPE_STRUN', 32);
 120
 121 /**
 122 * No cleaning - here for use in API
 123 */
 124 define('TYPE_NOCLEAN', 64);
 125
 126 /**
 127 * Duplicate of TYPE_NOCLEAN, but shorter
 128 */
 129 define('TYPE_NONE', TYPE_NOCLEAN);
 130
 131 /**
 132 * Macro for using DB->escape_binary() without cleaning - used in API
 133 */
 134 define('TYPE_BIN', 128);
 135 /**#@-*/
 136
 137 /**
 138 * Yes, required
 139 */
 140 define('REQ_YES', 1);
 141
 142 /**
 143 * No, not required
 144 */
 145 define('REQ_NO', 0);
 146
 147 /**
 148 * Blue Static ISSO Framework (ISSO)
 149 *
 150 * This framework allows a common backend to be used amongst all Blue
 151 * Static applications and is built to be abstract and flexible.
 152 * The base framework handles all loading and module management.
 153 *
 154 * Constants:
 155 *               ISSO_NO_INPUT_SANITIZE - Disables the automatic input sanitizer
 156 *               ISSO_CHECK_POST_REFERER - Will check to make sure that on POSTed
 157 *                                                                       data, the referer matches the host
 158 *               ISSO_MT_START - Define the microtime() value at the top of your
 159 *                                               script and this will calculate the total execution
 160 *                                               time
 161 *               SVN - Place SVN keywords (like $Id) to display the information on output
 162 *
 163 * @author               Blue Static
 164 * @copyright    Copyright ©2002 - [#]year[#], Blue Static
 165 * @version              $Revision$
 166 * @package              ISSO
 167 *
 168 */
 169 class ISSO
 170 {
 171         /**
 172         * ISSO version
 173         * @var  string
 174         * @access       private
 175         */
 176         var $version = '[#]issoversion[#]';
 177
 178         /**
 179         * Location of ISSO, used for internal linking
 180         * @var  string
 181         * @access       private
 182         */
 183         var $sourcepath = '';
 184
 185         /**
 186         * Path of the current application
 187         * @var  string
 188         * @access       private
 189         */
 190         var $apppath = '';
 191
 192         /**
 193         * Web path used to get the web location of the installation of ISSO; only used for Printer module
 194         * @var  string
 195         * @access       private
 196         */
 197         var $webpath = '';
 198
 199         /**
 200         * Name of the current application
 201         * @var  string
 202         * @access       private
 203         */
 204         var $application = '';
 205
 206         /**
 207         * Version of the current application
 208         * @var  string
 209         * @access       private
 210         */
 211         var $appversion = '';
 212
 213         /**
 214         * Whether debug mode is on or off
 215         * @var  bool
 216         * @access       private
 217         */
 218         var $debug = false;
 219
 220         /**
 221         * List of all active debug messages
 222         * @var  array
 223         * @access       private
 224         */
 225         var $debuginfo = array();
 226
 227         /**
 228         * List of loaded modules
 229         * @var  array
 230         * @access       private
 231         */
 232         var $modules = array();
 233
 234         /**
 235         * An array of sanitized variables that have been cleaned for HTML tag openers and double quotes
 236         * @var  array
 237         * @access       public
 238         */
 239         var $in = array();
 240
 241         /**
 242         * If we are running with magic_quotes_gpc on or off
 243         * @var  int
 244         * @access       private
 245         */
 246         var $magicquotes = 0;
 247
 248         /**
 249         * Array of user-specified fields that are required for ISSO initialization
 250         * fieldname => array(REQUIRED, CALLBACK PARSER, SET)
 251         * @var  array
 252         * @access       private
 253         */
 254         var $fields = array(
 255                 'webpath'               => array(REQ_NO,        'fetch_sourcepath',     false),
 256                 'application'   => array(REQ_YES,       null,                           false),
 257                 'appversion'    => array(REQ_NO,        null,                           false),
 258                 'debug'                 => array(REQ_NO,        null,                           false)
 259         );
 260
 261         // ###################################################################
 262         /**
 263         * Constructor
 264         */
 265         function __construct()
 266         {
 267                 $GLOBALS['isso:callback'] = null;
 268
 269                 // error reporting
 270                 set_error_handler(array(&$this, '_error_handler'));
 271
 272                 // magic quotes
 273                 $this->magicquotes = get_magic_quotes_gpc();
 274                 set_magic_quotes_runtime(0);
 275
 276                 // some debug info that's always useful
 277                 $this->debug('magic_quotes_gpc = ' . $this->magicquotes);
 278                 $this->debug('register_globals = ' . ini_get('register_globals'));
 279
 280                 // attempt to set the sourcepath
 281                 $path = call_user_func('debug_backtrace');
 282                 $this->setSourcePath(str_replace('kernel.php', '', $path[0]['file']));
 283
 284                 // start input sanitize using variable_order GPC
 285                 if (!defined('ISSO_NO_INPUT_SANITIZE'))
 286                 {
 287                         $this->exec_sanitize_data();
 288                 }
 289
 290                 if (defined('ISSO_CHECK_POST_REFERER'))
 291                 {
 292                         $this->exec_referer_check();
 293                 }
 294         }
 295
 296         // ###################################################################
 297         /**
 298         * (PHP 4) Constructor
 299         */
 300         function ISSO()
 301         {
 302                 $this->__construct();
 303         }
 304
 305         // ###################################################################
 306         /**
 307         * Sets the sourcepath
 308         *
 309         * @access       public
 310         *
 311         * @param        string  Source path
 312         */
 313         function setSourcePath($path)
 314         {
 315                 $this->sourcepath = $this->fetch_sourcepath($path);
 316         }
 317
 318         // ###################################################################
 319         /**
 320         * Gets the sourcepath
 321         *
 322         * @access       public
 323         *
 324         * @return       string  Source path
 325         */
 326         function getSourcePath()
 327         {
 328                 return $this->sourcepath;
 329         }
 330
 331         // ###################################################################
 332         /**
 333         * Sets the apppath
 334         *
 335         * @access       public
 336         *
 337         * @param        string  Application path
 338         */
 339         function setAppPath($path)
 340         {
 341                 $this->apppath = $this->fetch_sourcepath($path);
 342         }
 343
 344         // ###################################################################
 345         /**
 346         * Gets the apppath
 347         *
 348         * @access       public
 349         *
 350         * @return       string  Source path
 351         */
 352         function getAppPath()
 353         {
 354                 return $this->apppath;
 355         }
 356
 357         // ###################################################################
 358         /**
 359         * Prepares a path for being set as the sourcepath
 360         *
 361         * @access       public
 362         *
 363         * @param        string  Source path or URL
 364         *
 365         * @return       string  Prepared source path
 366         */
 367         function fetch_sourcepath($source)
 368         {
 369                 if (substr($source, strlen($source) - 1) != DIRECTORY_SEPARATOR)
 370                 {
 371                         $source .= DIRECTORY_SEPARATOR;
 372                 }
 373                 return $source;
 374         }
 375
 376         // ###################################################################
 377         /**
 378         * Loads a framework module
 379         *
 380         * @access       public
 381         *
 382         * @param        string  Name of the framework file to load
 383         * @param        string  Internal variable to initialize as; to not instantiate (just require) leave it as NULL
 384         * @param        bool    Globalize the internal variable?
 385         *
 386         * @return       object  Instantiated instance
 387         */
 388         function &load($framework, $asobject, $globalize = false)
 389         {
 390                 $this->check_isso_fields(null);
 391
 392                 // set the object interlock
 393                 if (!method_exists($GLOBALS['isso:callback'], 'load'))
 394                 {
 395                         $GLOBALS['isso:callback'] =& $this;
 396                         $this->modules['isso'] =& $this;
 397                 }
 398
 399                 if ($this->is_loaded($framework))
 400                 {
 401                         return $this->modules["$framework"];
 402                 }
 403
 404                 if ($this->sourcepath == '')
 405                 {
 406                         trigger_error('Invalid sourcepath specified', E_USER_ERROR);
 407                 }
 408
 409                 if (file_exists($this->sourcepath . $framework . '.php'))
 410                 {
 411                         require_once($this->sourcepath . $framework . '.php');
 412                 }
 413                 else
 414                 {
 415                         trigger_error('Could not find the framework ' . $this->sourcepath . $framework . '.php', E_USER_ERROR);
 416                 }
 417
 418                 if ($asobject === null)
 419                 {
 420                         return;
 421                 }
 422
 423                 if (isset($this->$asobject))
 424                 {
 425                         trigger_error('Cannot instantiate framework `' . $framework . '` into `' . $asobject . '`', E_USER_ERROR);
 426                 }
 427
 428                 $this->$asobject = new $framework($this);
 429
 430                 $this->modules["$framework"] =& $this->$asobject;
 431
 432                 if ($globalize)
 433                 {
 434                         $GLOBALS["$asobject"] =& $this->$asobject;
 435                 }
 436
 437                 // allow for init_as_package to link
 438                 if (method_exists($this->modules["$framework"], 'init_as_package'))
 439                 {
 440                         $this->modules[ $this->modules["$framework"]->init_as_package() ] =& $this->modules["$framework"];
 441                 }
 442
 443                 return $this->$asobject;
 444         }
 445
 446         // ###################################################################
 447         /**
 448         * Prints a list of all currently loaded framework modules
 449         *
 450         * @access       public
 451         *
 452         * @param        bool    Return the data as an array?
 453         *
 454         * @return       mixed   HTML output or an array of loaded modules
 455         */
 456         function show_modules($return = false)
 457         {
 458                 $modules = array();
 459                 foreach ($this->modules AS $object)
 460                 {
 461                         $module = get_class($object);
 462                         if (method_exists($object, 'init_as_package') AND in_array($module, $modules))
 463                         {
 464                                 $module = $object->init_as_package() . " - ($module)";
 465                         }
 466
 467                         $modules[] = $module;
 468                 }
 469
 470                 if ($return)
 471                 {
 472                         return $modules;
 473                 }
 474                 else
 475                 {
 476                         $output = "\n\n<ul>\n\t<li>";
 477                         $output .= implode("</li>\n\t<li>", $modules);
 478                         $output .= "</li>\n</ul>\n\n";
 479                         $this->message('Loaded Modules', $output, 1);
 480                 }
 481         }
 482
 483         // ###################################################################
 484         /**
 485         * Verifies to see if a framework has been loaded
 486         *
 487         * @access       public
 488         *
 489         * @param        string  Framework name
 490         *
 491         * @return       bool    Whether or not the framework has been loaded
 492         */
 493         function is_loaded($framework)
 494         {
 495                 if (isset($this->modules["$framework"]))
 496                 {
 497                         return true;
 498                 }
 499                 else
 500                 {
 501                         return false;
 502                 }
 503         }
 504
 505         // ###################################################################
 506         /**
 507         * Prints an ISSO message
 508         *
 509         * @access       public
 510         *
 511         * @param        string  The title of the message
 512         * @param        string  The content of the message
 513         * @param        integer Type of message to be printed
 514         * @param        bool    Return the output?
 515         * @param        bool    Show the debug stack?
 516         * @param        integer Message width
 517         *
 518         * @return       mixed   Output or null
 519         */
 520         function message($title, $message, $type, $return = false, $stack = true, $width = 500)
 521         {
 522                 switch ($type)
 523                 {
 524                         // Message
 525                         case 1:
 526                                 $prefix = 'Message';
 527                                 $color = '#669900';
 528                                 $font = '#000000';
 529                         break;
 530
 531                         // Warning
 532                         case 2:
 533                                 $prefix = 'Warning';
 534                                 $color = '#003399';
 535                                 $font = '#FFFFFF';
 536                         break;
 537
 538                         case 3:
 539                                 $prefix = 'Error';
 540                                 $color = '#990000';
 541                                 $font = '#EFEFEF';
 542                         break;
 543                 }
 544
 545                 $backtrace = debug_backtrace();
 546                 array_shift($backtrace);
 547
 548                 if (isset($backtrace[0]) AND $backtrace[0]['function'] == '_error_handler')
 549                 {
 550                         array_shift($backtrace);
 551                 }
 552
 553                 $trace = $this->format_debug_trace($backtrace);
 554
 555                 $output = "\n<br />\n<table cellpadding=\"4\" cellspacing=\"1\" border=\"0\" width=\"$width\" style=\"background-color: $color; color: black; font-family: Verdana, sans-serif; font-size: 12px;\">";
 556                 $output .= "\n<tr style=\"color: $font; text-align: left\">\n\t<td><strong>$prefix: $title</strong></td>\n</tr>";
 557                 $output .= "\n<tr style=\"background-color: #FFFFFF; text-align: left\">\n\t<td>$message</td>\n</tr>";
 558                 $output .= (($stack AND $GLOBALS['isso:callback']->debug) ? "\n<tr style=\"background-color: #FFFFFF; text-align: left\">\n\t<td><strong>Debug Stack:</strong> <pre>" . implode("\n", $trace) . "</pre></td>\n</tr>" : '');
 559                 $output .= "\n</table>\n<br />\n";
 560
 561                 if ($return)
 562                 {
 563                         return $output;
 564                 }
 565                 else
 566                 {
 567                         print($output);
 568                 }
 569         }
 570
 571         // ###################################################################
 572         /**
 573         * Prepares a debug_backtrace() array for output to the browser by
 574         * compressing the array into visible text
 575         *
 576         * @access       public
 577         *
 578         * @param        array   debug_backtrace() array
 579         *
 580         * @return       array   Formatted trace output
 581         */
 582         function format_debug_trace($backtrace)
 583         {
 584                 $trace = array();
 585                 foreach ($backtrace AS $i => $step)
 586                 {
 587                         $args = '';
 588                         $file = $step['file'] . ':' . $step['line'];
 589                         $funct = (isset($step['class']) ? $step['class'] . '::' . $step['function'] : $step['function']);
 590
 591                         if (isset($step['args']) AND is_array($step['args']))
 592                         {
 593                                 // we need to do this so we don't get "Array to string conversion" notices
 594                                 foreach ($step['args'] AS $id => $arg)
 595                                 {
 596                                         if (is_array($arg))
 597                                         {
 598                                                 $step['args']["$id"] = 'Array';
 599                                         }
 600                                 }
 601                                 $args = implode(', ', $step['args']);
 602                         }
 603
 604                         $trace[] = "#$i  $funct($args) called at [$file]";
 605                 }
 606
 607                 return $trace;
 608         }
 609
 610         // ###################################################################
 611         /**
 612         * Custom error handler for ISSO; only handle E_WARNING, E_NOTICE,
 613         * E_USER_ERROR, E_USER_WARNING, E_USER_NOTICE
 614         *
 615         * @access       private
 616         *
 617         * @param        integer Error number
 618         * @param        string  Error message string
 619         * @param        string  File that contains the error
 620         * @param        string  The line number of the error
 621         * @param        string  The active symbol table at which point the error occurred
 622         */
 623         function _error_handler($errno, $errstr, $errfile, $errline, $errcontext)
 624         {
 625                 $level = ini_get('error_reporting');
 626
 627                 switch ($errno)
 628                 {
 629                         // Fatal
 630                         case E_USER_ERROR:
 631                                 $title = 'Fatal';
 632                                 $mode = 3;
 633                                 if (!($level & E_USER_ERROR))
 634                                 {
 635                                         return;
 636                                 }
 637                         break;
 638
 639                         // Error
 640                         case E_USER_WARNING:
 641                         case E_WARNING:
 642                                 $title = 'Warning';
 643                                 $mode = 2;
 644                                 if (! (($level & E_USER_WARNING) AND ($level & E_WARNING)) )
 645                                 {
 646                                         return;
 647                                 }
 648                         break;
 649
 650                         // Warning
 651                         case E_USER_NOTICE:
 652                         case E_NOTICE:
 653                         default:
 654                                 $title = 'Notice';
 655                                 $mode = 1;
 656                                 if (! (($level & E_USER_NOTICE) AND ($level & E_NOTICE)) )
 657                                 {
 658                                         return;
 659                                 }
 660                         break;
 661                 }
 662
 663                 $errstr .= " in <strong>$errfile</strong> on line <strong>$errline</strong>";
 664
 665                 $errstr = str_replace(array(getcwd(), dirname(getcwd())), '', $errstr);
 666
 667                 $this->message($title, $errstr, $mode);
 668
 669                 if ($errno == E_USER_ERROR)
 670                 {
 671                         exit;
 672                 }
 673         }
 674
 675         // ###################################################################
 676         /**
 677         * Creates a table that explains the error reporting levels and their
 678         * state
 679         *
 680         * @access       public
 681         */
 682         function explain_error_reporting()
 683         {
 684                 $levels = array(
 685                         'E_ERROR'                       => E_ERROR,
 686                         'E_WARNING'                     => E_WARNING,
 687                         'E_PARSE'                       => E_PARSE,
 688                         'E_NOTICE'                      => E_NOTICE,
 689                         'E_CORE_ERROR'          => E_CORE_ERROR,
 690                         'E_CORE_WARNING'        => E_CORE_WARNING,
 691                         'E_COMPILE_ERROR'       => 64,
 692                         'E_COMPILE_WARNING'     => 128,
 693                         'E_USER_ERROR'          => E_USER_ERROR,
 694                         'E_USER_WARNING'        => E_USER_WARNING,
 695                         'E_USER_NOTICE'         => E_USER_NOTICE,
 696                         'E_ALL'                         => E_ALL,
 697                         'E_STRICT'                      => 2048
 698                 );
 699
 700                 $table = '<table cellspacing="0" cellpadding="2" border="0">';
 701
 702                 foreach ($levels AS $name => $value)
 703                 {
 704                         $table .= '
 705                         <tr>
 706                                 <td>' . $name . '</td>
 707                                 <td>' . (ini_get('error_reporting') & $value) . '</td>
 708                         </tr>';
 709                 }
 710
 711                 $table .= '
 712                 </table>';
 713
 714                 $this->message('Error Reporting', $table, 1);
 715         }
 716
 717         // ###################################################################
 718         /**
 719         * Logs a debug message for verbose output
 720         *
 721         * @access       public
 722         *
 723         * @param        string  Message
 724         */
 725         function debug($message)
 726         {
 727                 $this->debuginfo[] = $message;
 728         }
 729
 730         // ###################################################################
 731         /**
 732         * Recursive XSS cleaner
 733         *
 734         * @access       private
 735         *
 736         * @param        mixed   Unsanitized REQUEST data
 737         *
 738         * @return       mixed   Sanitized data
 739         */
 740         function _sanitize_input_recursive($data)
 741         {
 742                 foreach ($data AS $key => $value)
 743                 {
 744                         if (is_array($value))
 745                         {
 746                                 $data["$key"] = $this->_sanitize_input_recursive($value);
 747                         }
 748                         else
 749                         {
 750                                 if ($this->magicquotes)
 751                                 {
 752                                         $value = str_replace("\'", "'", $value);
 753                                 }
 754                                 $data["$key"] = $this->sanitize($value);
 755                         }
 756                 }
 757                 return $data;
 758         }
 759
 760         // ###################################################################
 761         /**
 762         * Simple way to protect against HTML attacks with Unicode support
 763         *
 764         * @access       public
 765         *
 766         * @param        string  Unsanitzed text
 767         *
 768         * @return       string  Properly protected text that only encodes potential threats
 769         */
 770         function sanitize($text)
 771         {
 772                 if ($this->magicquotes)
 773                 {
 774                         return str_replace(array('<', '>', '\"', '"'), array('&lt;', '&gt;', '&quot;', '&quot;'), $text);
 775                 }
 776                 else
 777                 {
 778                         return str_replace(array('<', '>', '"'), array('&lt;', '&gt;', '&quot;'), $text);
 779                 }
 780         }
 781
 782         // ###################################################################
 783         /**
 784         * Unicode-safe entity encoding system; similar to sanitize()
 785         *
 786         * @access       public
 787         *
 788         * @param        string  Unsanitized text
 789         *
 790         * @return       string  Unicode-safe sanitized text with entities preserved
 791         */
 792         function entity_encode($text)
 793         {
 794                 $text = str_replace('&', '&amp;', $text);
 795                 $text = $this->sanitize($text);
 796                 return $text;
 797         }
 798
 799         // ###################################################################
 800         /**
 801         * Takes text that has been processed for HTML and unsanitizes it
 802         *
 803         * @access       public
 804         *
 805         * @param        string  Text that needs to be turned back into HTML
 806         *
 807         * @return       string  Unsanitized text
 808         */
 809         function unsanitize($text)
 810         {
 811                 return str_replace(array('&lt;', '&gt;', '&quot;'), array('<', '>', '"'), $text);
 812         }
 813
 814         // ###################################################################
 815         /**
 816         * Smart addslashes() that only applies itself it the Magic Quotes GPC
 817         * is off. This should only be run on database query values that come
 818         * from ISSO->in[] input; data that needs sanitization should be run
 819         * through ISSO->DB->escape_string()
 820         *
 821         * @access       public
 822         *
 823         * @param        string  Some string
 824         * @param        bool    Force magic quotes to be off
 825         *
 826         * @return       string  String that has slashes added
 827         */
 828         function escape($str, $force = true)
 829         {
 830                 if ($this->magicquotes AND !$force)
 831                 {
 832                         if (isset($this->modules[ISSO_DB_LAYER]))
 833                         {
 834                                 return $this->modules[ISSO_DB_LAYER]->escape_string(str_replace(array("\'", '\"'), array("'", '"'), $str));
 835                         }
 836                         return $str;
 837                 }
 838                 else
 839                 {
 840                         if (isset($this->modules[ISSO_DB_LAYER]))
 841                         {
 842                                 return $this->modules[ISSO_DB_LAYER]->escape_string($str);
 843                         }
 844                         return addslashes($str);
 845                 }
 846         }
 847
 848         // ###################################################################
 849         /**
 850         * Runs through all of the input data and sanitizes it.
 851         *
 852         * @access       private
 853         */
 854         function exec_sanitize_data()
 855         {
 856                 $this->in = $this->_sanitize_input_recursive(array_merge($_GET, $_POST, $_COOKIE));
 857         }
 858
 859         // ###################################################################
 860         /**
 861         * Sanitize function for something other than a string (which
 862         * everything is sanitized for if you use exec_sanitize_data(). Cleaned
 863         * data is placed back into $isso->in; this makes it so you don't have
 864         * to constantly intval() [etc.] data.
 865         *
 866         * @access       public
 867         *
 868         * @param        array   Array of elements to clean as varname => type
 869         */
 870         function input_clean_array($vars)
 871         {
 872                 foreach ($vars AS $varname => $type)
 873                 {
 874                         $this->input_clean($varname, $type);
 875                 }
 876         }
 877
 878         // ###################################################################
 879         /**
 880         * Sanitize function that does a single variable as oppoesd to an array
 881         * (see input_clean_array() for more details)
 882         *
 883         * @access       public
 884         *
 885         * @param        string  Variable name in $isso->in[]
 886         * @param        integer Sanitization type constant
 887         */
 888         function input_clean($varname, $type)
 889         {
 890                 if (isset($this->in["$varname"]))
 891                 {
 892                         $this->in["$varname"] = $this->clean($this->in["$varname"], $type);
 893                 }
 894                 else
 895                 {
 896                         $this->in["$varname"] = $this->clean(null, $type);
 897                 }
 898
 899                 return $this->in["$varname"];
 900         }
 901
 902         // ###################################################################
 903         /**
 904         * Runs ISSO->escape() on a variable on ISSO->in[]. This is just a
 905         * short-hand wrapper so that queries can be shortened. When this is used,
 906         * the actual value in ISSO->in[] is not changed, only the return value
 907         * is escaped.
 908         *
 909         * @access       public
 910         *
 911         * @param        string  Input variable
 912         *
 913         * @return       string  Escaped input
 914         */
 915         function input_escape($varname)
 916         {
 917                 if (isset($this->in["$varname"]))
 918                 {
 919                         return $this->escape($this->in["$varname"]);
 920                 }
 921                 else
 922                 {
 923                         return $this->escape(null);
 924                 }
 925         }
 926
 927         // ###################################################################
 928         /**
 929         * Cleaning function that does the work for input_clean(); this is
 930         * moved here so it can be used to clean things that aren't in
 931         * $isso->in[]
 932         *
 933         * @access       public
 934         *
 935         * @param        mixed   Data
 936         * @param        integer Sanitization type constant
 937         *
 938         * @return       mixed   Cleaned data
 939         */
 940         function clean($value, $type)
 941         {
 942                 if (is_array($value))
 943                 {
 944                         return $this->clean_array($value, $type);
 945                 }
 946
 947                 if ($type == TYPE_INT)
 948                 {
 949                         $value = intval($value);
 950                 }
 951                 else if ($type == TYPE_UINT)
 952                 {
 953                         $value = (($val = intval($value)) < 0 ? 0 : $val);
 954                 }
 955                 else if ($type == TYPE_FLOAT)
 956                 {
 957                         $value = floatval($value);
 958                 }
 959                 else if ($type == TYPE_BOOL)
 960                 {
 961                         $value = (bool)$value;
 962                 }
 963                 else if ($type == TYPE_STR)
 964                 {
 965                         $value = $value;
 966                 }
 967                 else if ($type == TYPE_STRUN)
 968                 {
 969                         $value = $this->unsanitize($value);
 970                 }
 971                 else if ($type == TYPE_NOCLEAN)
 972                 {
 973                         if ($this->magicquotes)
 974                         {
 975                                 $value = str_replace(array('\"', "\'"), array('"', "'"), $value);
 976                         }
 977                         else
 978                         {
 979                                 $value = $value;
 980                         }
 981                 }
 982                 else if ($type == TYPE_BIN)
 983                 {
 984                         $value = $value;
 985                 }
 986                 else
 987                 {
 988                         trigger_error('Invalid clean type `' . $type . '` specified', E_USER_ERROR);
 989                 }
 990
 991                 return $value;
 992         }
 993
 994         // ###################################################################
 995         /**
 996         * Recursion function for ISSO->clean()
 997         *
 998         * @access       private
 999         *
1000         * @param        array   Uncleaned array
1001         * @param        integer Sanitization type constant
1002         *
1003         * @return       array   Cleaned array of data
1004         */
1005         function clean_array($array, $type)
1006         {
1007                 foreach ($array AS $key => $value)
1008                 {
1009                         $array["$key"] = $this->clean($value, $type);
1010                 }
1011
1012                 return $array;
1013         }
1014
1015         // ###################################################################
1016         /**
1017         * Checks to see if a POST refer is actually from us
1018         *
1019         * @access       public
1020         */
1021         function exec_referer_check()
1022         {
1023                 if ($_SERVER['REQUEST_METHOD'] == 'POST')
1024                 {
1025                         $host = ($_SERVER['HTTP_HOST']) ? $_SERVER['HTTP_HOST'] : $_ENV['HTTP_HOST'];
1026
1027                         if ($host AND $_SERVER['HTTP_REFERER'])
1028                         {
1029                                 $parts = parse_url($_SERVER['HTTP_REFERER']);
1030                                 $ourhost = $parts['host'] . (isset($parts['port']) ? ":$parts[port]" : '');
1031
1032                                 if ($ourhost != $host)
1033                                 {
1034                                         trigger_error('No external hosts are allowed to POST to this application', E_USER_ERROR);
1035                                 }
1036                                 $this->debug('remote post check = ok');
1037                         }
1038                         else
1039                         {
1040                                 $this->debug('remote post check = FAILED');
1041                         }
1042                 }
1043         }
1044
1045         // ###################################################################
1046         /**
1047         * Constructs a debug information box that contains various debugging
1048         * information points
1049         *
1050         * @access       public
1051         *
1052         * @param        bool    Show template information?
1053         *
1054         * @return       string  Debugging block
1055         */
1056         function construct_debug_block($dotemplates)
1057         {
1058                 $debug = '';
1059
1060                 if ($this->debug)
1061                 {
1062                         $debug = "\n<ul>";
1063
1064                         // templates
1065                         if ($dotemplates)
1066                         {
1067                                 $optlist = array();
1068                                 $usage = array();
1069                                 foreach ($this->modules['template']->usage AS $name => $count)
1070                                 {
1071                                         if (in_array($name, $this->modules['template']->uncached))
1072                                         {
1073                                                 $optlist[] = $name . '[' . $count . ']';
1074                                         }
1075                                         $usage[] = $name . " ($count)";
1076                                 }
1077
1078                                 $sizeof = sizeof($this->modules['template']->uncached);
1079                                 if ($sizeof > 0)
1080                                 {
1081                                         $debug .= "\n\t<li><strong style=\"color: red\">Uncached Template(s):</strong> $sizeof ( " . implode(' &nbsp; ', $optlist) . " )</li>";
1082                                 }
1083                         }
1084
1085                         // source control
1086                         $scinfo = 'Not Under Source Control';
1087                         if (defined('SVN'))
1088                         {
1089                                 $scinfo = constant('SVN');
1090
1091                                 if (preg_match('#\$Id:?\s*\$#', $scinfo))
1092                                 {
1093                                         $scinfo = 'Not Under Source Control';
1094                                 }
1095                                 else
1096                                 {
1097                                         $scinfo = preg_replace('#\$' . '(Head)?URL: (.+?) \$#e', "end(explode('/', '\\2'))", $scinfo);
1098                                         $scinfo = preg_replace('#\$' . '(LastModified)?Revision: (.+?) \$#', 'SVN \\2', $scinfo);
1099                                         $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);
1100                                 }
1101                         }
1102
1103                         $scinfo = trim($scinfo);
1104                         $debug .= "\n\t<li><strong>Source Control:</strong> $scinfo</li>";
1105
1106                         // query information
1107                         if (is_object($this->modules[ISSO_DB_LAYER]))
1108                         {
1109                                 $debug .= "\n\t<li><strong>Total Queries:</strong> " . sizeof($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>";
1110                         }
1111
1112                         // total execution time
1113                         if (defined('ISSO_MT_START'))
1114                         {
1115                                 $this->load('functions', 'functions');
1116                                 $debug .= "\n\t<li><strong>Total Execution Time:</strong> " . round($this->modules['functions']->fetch_microtime_diff(ISSO_MT_START), 10) . "</li>";
1117                         }
1118
1119                         // debug notices
1120                         $debug .= "\n\t<li>\n\t\t<select>\n\t\t\t<option>Debug Notices (" . sizeof($this->debuginfo) . ")</option>";
1121                         foreach ((array)$this->debuginfo AS $msg)
1122                         {
1123                                 $debug .= "\n\t\t\t<option>--- $msg</option>";
1124                         }
1125                         $debug .= "\n\t\t</select>\n\t</li>";
1126
1127                         // loaded modules
1128                         $modules = $this->show_modules(true);
1129                         $debug .= "\n\t<li>\n\t\t<select>\n\t\t\t<option>Loaded Modules (" . sizeof($modules) . ")</option>";
1130                         foreach ($modules AS $mod)
1131                         {
1132                                 $debug .= "\n\t\t\t<option>--- $mod</option>";
1133                         }
1134                         $debug .= "\n\t\t</select>\n\t</li>";
1135
1136                         // template usage
1137                         if ($dotemplates)
1138                         {
1139                                 $debug .= "\n\t<li>\n\t\t<select>\n\t\t\t<option>Template Usage (" . array_sum($this->modules['template']->usage) . ")</option>";
1140                                 foreach ($usage AS $tpl)
1141                                 {
1142                                         $debug .= "\n\t\t\t<option>--- $tpl</option>";
1143                                 }
1144                                 $debug .= "\n\t\t</select>\n\t</li>";
1145                         }
1146
1147                         $debug .= "\n</ul>";
1148
1149                         $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";
1150                 }
1151
1152                 return $debug;
1153         }
1154 }
1155
1156 /*=====================================================================*\
1157 || ###################################################################
1158 || # $HeadURL$
1159 || # $Id$
1160 || ###################################################################
1161 \*=====================================================================*/
1162 ?>