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   1  <?php
   2  # MantisBT - A PHP based bugtracking system
   3  
   4  # MantisBT is free software: you can redistribute it and/or modify
   5  # it under the terms of the GNU General Public License as published by
   6  # the Free Software Foundation, either version 2 of the License, or
   7  # (at your option) any later version.
   8  #
   9  # MantisBT is distributed in the hope that it will be useful,
  10  # but WITHOUT ANY WARRANTY; without even the implied warranty of
  11  # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  12  # GNU General Public License for more details.
  13  #
  14  # You should have received a copy of the GNU General Public License
  15  # along with MantisBT.  If not, see <http://www.gnu.org/licenses/>.
  16  
  17  /**
  18   * MantisBT Core
  19   *
  20   * Initialises the MantisBT core, connects to the database, starts plugins and
  21   * performs other global operations that either help initialise MantisBT or
  22   * are required to be executed on every page load.
  23   *
  24   * @package MantisBT
  25   * @copyright Copyright (C) 2000 - 2002  Kenzaburo Ito - kenito@300baud.org
  26   * @copyright Copyright (C) 2002 - 2011  MantisBT Team - mantisbt-dev@lists.sourceforge.net
  27   * @link http://www.mantisbt.org
  28   *
  29   * @uses authentication_api.php
  30   * @uses collapse_api.php
  31   * @uses compress_api.php
  32   * @uses config_api.php
  33   * @uses config_defaults_inc.php
  34   * @uses config_inc.php
  35   * @uses constant_inc.php
  36   * @uses crypto_api.php
  37   * @uses custom_constants_inc.php
  38   * @uses custom_functions_inc.php
  39   * @uses database_api.php
  40   * @uses event_api.php
  41   * @uses http_api.php
  42   * @uses lang_api.php
  43   * @uses mantis_offline.php
  44   * @uses plugin_api.php
  45   * @uses php_api.php
  46   * @uses user_pref_api.php
  47   * @uses wiki_api.php
  48   * @uses utf8/utf8.php
  49   * @uses utf8/str_pad.php
  50   */
  51  
  52  /**
  53   * Before doing anything... check if MantisBT is down for maintenance
  54   *
  55   *   To make MantisBT 'offline' simply create a file called
  56   *   'mantis_offline.php' in the MantisBT root directory.
  57   *   Users are redirected to that file if it exists.
  58   *   If you have to test MantisBT while it's offline, add the
  59   *   parameter 'mbadmin=1' to the URL.
  60   */
  61  if ( file_exists( 'mantis_offline.php' ) && !isset( $_GET['mbadmin'] ) ) {
  62      include( 'mantis_offline.php' );
  63      exit;
  64  }
  65  
  66  $g_request_time = microtime( true );
  67  
  68  ob_start();
  69  
  70  # Load supplied constants
  71  require_once( dirname( __FILE__ ) . DIRECTORY_SEPARATOR . 'core' . DIRECTORY_SEPARATOR . 'constant_inc.php' );
  72  
  73  # Load user-defined constants (if required)
  74  if ( file_exists( dirname( __FILE__ ) . DIRECTORY_SEPARATOR . 'custom_constants_inc.php' ) ) {
  75      require_once( dirname( __FILE__ ) . DIRECTORY_SEPARATOR . 'custom_constants_inc.php' );
  76  }
  77  
  78  $t_config_inc_found = false;
  79  
  80  # Include default configuration settings
  81  require_once( dirname( __FILE__ ) . DIRECTORY_SEPARATOR . 'config_defaults_inc.php' );
  82  
  83  # config_inc may not be present if this is a new install
  84  if ( file_exists( dirname( __FILE__ ) . DIRECTORY_SEPARATOR . 'config_inc.php' ) ) {
  85      require_once( dirname( __FILE__ ) . DIRECTORY_SEPARATOR . 'config_inc.php' );
  86      $t_config_inc_found = true;
  87  }
  88  
  89  # Allow an environment variable (defined in an Apache vhost for example)
  90  # to specify a config file to load to override other local settings
  91  $t_local_config = getenv( 'MANTIS_CONFIG' );
  92  if ( $t_local_config && file_exists( $t_local_config ) ){
  93      require_once( $t_local_config );
  94      $t_config_inc_found = true;
  95  }
  96  
  97  # Remember (globally) which API files have already been loaded
  98  $g_api_included = array();
  99  
 100  # Define an API inclusion function to replace require_once
 101  function require_api( $p_api_name ) {
 102      global $g_api_included;
 103      global $g_core_path;
 104      if ( !isset( $g_api_included[$p_api_name] ) ) {
 105          $t_existing_globals = get_defined_vars();
 106          require_once( $g_core_path . $p_api_name );
 107          $t_new_globals = array_diff_key( get_defined_vars(), $GLOBALS, array( 't_existing_globals' => 0, 't_new_globals' => 0 ) );
 108          foreach ( $t_new_globals as $t_global_name => $t_global_value ) {
 109              global $$t_global_name;
 110          }
 111          extract( $t_new_globals );
 112          $g_api_included[$p_api_name] = 1;
 113      }
 114  }
 115  
 116  # Remember (globally) which library files have already been loaded
 117  $g_libraries_included = array();
 118  
 119  # Define an API inclusion function to replace require_once
 120  function require_lib( $p_library_name ) {
 121      global $g_libraries_included;
 122      global $g_library_path;
 123      if ( !isset( $g_libraries_included[$p_library_name] ) ) {
 124          $t_existing_globals = get_defined_vars();
 125          require_once( $g_library_path . $p_library_name );
 126          $t_new_globals = array_diff_key( get_defined_vars(), $GLOBALS, array( 't_existing_globals' => 0, 't_new_globals' => 0 ) );
 127          foreach ( $t_new_globals as $t_global_name => $t_global_value ) {
 128              global $$t_global_name;
 129          }
 130          extract( $t_new_globals );
 131          $g_libraries_included[$p_library_name] = 1;
 132      }
 133  }
 134  
 135  # Define an autoload function to automatically load classes when referenced
 136  function __autoload( $className ) {
 137      global $g_class_path;
 138      global $g_library_path;
 139  
 140      $t_require_path = $g_class_path . $className . '.class.php';
 141  
 142      if ( file_exists( $t_require_path ) ) {
 143          require_once( $t_require_path );
 144          return;
 145      }
 146  
 147      $t_require_path = $g_library_path . 'rssbuilder' . DIRECTORY_SEPARATOR . 'class.' . $className . '.inc.php';
 148  
 149      if ( file_exists( $t_require_path ) ) {
 150          require_once( $t_require_path );
 151          return;
 152      }
 153  }
 154  
 155  # Register the autoload function to make it effective immediately
 156  spl_autoload_register( '__autoload' );
 157  
 158  # Load UTF8-capable string functions
 159  define( 'UTF8', $g_library_path . 'utf8' );
 160  require_lib( 'utf8/utf8.php' );
 161  require_lib( 'utf8/str_pad.php' );
 162  
 163  # Include PHP compatibility file
 164  require_api( 'php_api.php' );
 165  
 166  # Enforce our minimum PHP requirements
 167  if( !php_version_at_least( PHP_MIN_VERSION ) ) {
 168      @ob_end_clean();
 169      echo '<strong>FATAL ERROR: Your version of PHP is too old. MantisBT requires PHP version ' . PHP_MIN_VERSION . ' or newer</strong><br />Your version of PHP is version ' . phpversion();
 170      die();
 171  }
 172  
 173  # Ensure that output is blank so far (output at this stage generally denotes
 174  # that an error has occurred)
 175  if ( ( $t_output = ob_get_contents() ) != '' ) {
 176      echo 'Possible Whitespace/Error in Configuration File - Aborting. Output so far follows:<br />';
 177      echo var_dump( $t_output );
 178      die;
 179  }
 180  
 181  # Start HTML compression handler (if enabled)
 182  require_api( 'compress_api.php' );
 183  compress_start_handler();
 184  
 185  # If no configuration file exists, redirect the user to the admin page so
 186  # they can complete installation and configuration of MantisBT
 187  if ( false === $t_config_inc_found ) {
 188      if ( !( isset( $_SERVER['SCRIPT_NAME'] ) && ( 0 < strpos( $_SERVER['SCRIPT_NAME'], 'admin' ) ) ) ) {
 189          header( 'Content-Type: text/html' );
 190          header( "Location: admin/install.php" );
 191          exit;
 192      }
 193  }
 194  
 195  # Initialise cryptographic keys
 196  require_api( 'crypto_api.php' );
 197  crypto_init();
 198  
 199  # Connect to the database
 200  require_api( 'database_api.php' );
 201  require_api( 'config_api.php' );
 202  
 203  if ( !defined( 'MANTIS_MAINTENANCE_MODE' ) ) {
 204      if( OFF == $g_use_persistent_connections ) {
 205          db_connect( config_get_global( 'dsn', false ), $g_hostname, $g_db_username, $g_db_password, $g_database_name, config_get_global( 'db_schema' ) );
 206      } else {
 207          db_connect( config_get_global( 'dsn', false ), $g_hostname, $g_db_username, $g_db_password, $g_database_name, config_get_global( 'db_schema' ), true );
 208      }
 209  }
 210  
 211  # Initialise plugins
 212  if ( !defined( 'PLUGINS_DISABLED' ) && !defined( 'MANTIS_MAINTENANCE_MODE' ) ) {
 213      require_api( 'plugin_api.php' );
 214      plugin_init_installed();
 215  }
 216  
 217  # Initialise Wiki integration
 218  if( config_get_global( 'wiki_enable' ) == ON ) {
 219      require_api( 'wiki_api.php' );
 220      wiki_init();
 221  }
 222  
 223  if ( !isset( $g_login_anonymous ) ) {
 224      $g_login_anonymous = true;
 225  }
 226  
 227  # Attempt to set the current timezone to the user's desired value
 228  # Note that PHP 5.1 on RHEL/CentOS doesn't support the timezone functions
 229  # used here so we just skip this action on RHEL/CentOS platforms.
 230  if ( function_exists( 'timezone_identifiers_list' ) ) {
 231      if ( in_array ( config_get_global( 'default_timezone' ), timezone_identifiers_list() ) ) {
 232          // if a default timezone is set in config, set it here, else we use php.ini's value
 233          // having a timezone set avoids a php warning
 234          date_default_timezone_set( config_get_global( 'default_timezone' ) );
 235      }
 236  
 237      require_api( 'authentication_api.php' );
 238      if( auth_is_user_authenticated() ) {
 239          require_api( 'user_pref_api.php' );
 240          date_default_timezone_set( user_pref_get_pref( auth_get_current_user_id(), 'timezone' ) );
 241      }
 242  }
 243  
 244  if ( !defined( 'MANTIS_MAINTENANCE_MODE' ) ) {
 245      require_api( 'collapse_api.php' );
 246      collapse_cache_token();
 247  }
 248  
 249  # Load custom functions
 250  require_api( 'custom_function_api.php' );
 251  if ( file_exists( dirname( __FILE__ ) . DIRECTORY_SEPARATOR . 'custom_functions_inc.php' ) ) {
 252      require_once( dirname( __FILE__ ) . DIRECTORY_SEPARATOR . 'custom_functions_inc.php' );
 253  }
 254  
 255  # Set HTTP response headers
 256  require_api( 'http_api.php' );
 257  http_all_headers();
 258  
 259  # Push default language to speed calls to lang_get
 260  if ( !defined( 'LANG_LOAD_DISABLED' ) ) {
 261      require_api( 'lang_api.php' );
 262      lang_push( lang_get_default() );
 263  }
 264  
 265  # Signal plugins that the core system is loaded
 266  if ( !defined( 'PLUGINS_DISABLED' ) && !defined( 'MANTIS_MAINTENANCE_MODE' ) ) {
 267      require_api( 'event_api.php' );
 268      event_signal( 'EVENT_CORE_READY' );
 269  }