codeigniter/CodeIgniter.php

   1 <?php  if ( ! defined('BASEPATH')) exit('No direct script access allowed');
   2 /**
   3  * CodeIgniter
   4  *
   5  * An open source application development framework for PHP 4.3.2 or newer
   6  *
   7  * @package             CodeIgniter
   8  * @author              ExpressionEngine Dev Team
   9  * @copyright   Copyright (c) 2008, EllisLab, Inc.
  10  * @license             http://codeigniter.com/user_guide/license.html
  11  * @link                http://codeigniter.com
  12  * @since               Version 1.0
  13  * @filesource
  14  */
  15
  16 // ------------------------------------------------------------------------
  17
  18 /**
  19  * System Front Controller
  20  *
  21  * Loads the base classes and executes the request.
  22  *
  23  * @package             CodeIgniter
  24  * @subpackage  codeigniter
  25  * @category    Front-controller
  26  * @author              ExpressionEngine Dev Team
  27  * @link                http://codeigniter.com/user_guide/
  28  */
  29
  30 // CI Version
  31 define('CI_VERSION',    '1.7.0');
  32
  33 /*
  34  * ------------------------------------------------------
  35  *  Load the global functions
  36  * ------------------------------------------------------
  37  */
  38 require(BASEPATH.'codeigniter/Common'.EXT);
  39
  40 /*
  41  * ------------------------------------------------------
  42  *  Load the compatibility override functions
  43  * ------------------------------------------------------
  44  */
  45 require(BASEPATH.'codeigniter/Compat'.EXT);
  46
  47 /*
  48  * ------------------------------------------------------
  49  *  Load the framework constants
  50  * ------------------------------------------------------
  51  */
  52 require(APPPATH.'config/constants'.EXT);
  53
  54 /*
  55  * ------------------------------------------------------
  56  *  Define a custom error handler so we can log PHP errors
  57  * ------------------------------------------------------
  58  */
  59 set_error_handler('_exception_handler');
  60 set_magic_quotes_runtime(0); // Kill magic quotes
  61
  62 /*
  63  * ------------------------------------------------------
  64  *  Start the timer... tick tock tick tock...
  65  * ------------------------------------------------------
  66  */
  67
  68 $BM =& load_class('Benchmark');
  69 $BM->mark('total_execution_time_start');
  70 $BM->mark('loading_time_base_classes_start');
  71
  72 /*
  73  * ------------------------------------------------------
  74  *  Instantiate the hooks class
  75  * ------------------------------------------------------
  76  */
  77
  78 $EXT =& load_class('Hooks');
  79
  80 /*
  81  * ------------------------------------------------------
  82  *  Is there a "pre_system" hook?
  83  * ------------------------------------------------------
  84  */
  85 $EXT->_call_hook('pre_system');
  86
  87 /*
  88  * ------------------------------------------------------
  89  *  Instantiate the base classes
  90  * ------------------------------------------------------
  91  */
  92
  93 $CFG =& load_class('Config');
  94 $URI =& load_class('URI');
  95 $RTR =& load_class('Router');
  96 $OUT =& load_class('Output');
  97
  98 /*
  99  * ------------------------------------------------------
 100  *      Is there a valid cache file?  If so, we're done...
 101  * ------------------------------------------------------
 102  */
 103
 104 if ($EXT->_call_hook('cache_override') === FALSE)
 105 {
 106         if ($OUT->_display_cache($CFG, $URI) == TRUE)
 107         {
 108                 exit;
 109         }
 110 }
 111
 112 /*
 113  * ------------------------------------------------------
 114  *  Load the remaining base classes
 115  * ------------------------------------------------------
 116  */
 117
 118 $IN             =& load_class('Input');
 119 $LANG   =& load_class('Language');
 120
 121 /*
 122  * ------------------------------------------------------
 123  *  Load the app controller and local controller
 124  * ------------------------------------------------------
 125  *
 126  *  Note: Due to the poor object handling in PHP 4 we'll
 127  *  conditionally load different versions of the base
 128  *  class.  Retaining PHP 4 compatibility requires a bit of a hack.
 129  *
 130  *  Note: The Loader class needs to be included first
 131  *
 132  */
 133 if (floor(phpversion()) < 5)
 134 {
 135         load_class('Loader', FALSE);
 136         require(BASEPATH.'codeigniter/Base4'.EXT);
 137 }
 138 else
 139 {
 140         require(BASEPATH.'codeigniter/Base5'.EXT);
 141 }
 142
 143 // Load the base controller class
 144 load_class('Controller', FALSE);
 145
 146 // Load the local application controller
 147 // Note: The Router class automatically validates the controller path.  If this include fails it
 148 // means that the default controller in the Routes.php file is not resolving to something valid.
 149 if ( ! file_exists(APPPATH.'controllers/'.$RTR->fetch_directory().$RTR->fetch_class().EXT))
 150 {
 151         show_error('Unable to load your default controller.  Please make sure the controller specified in your Routes.php file is valid.');
 152 }
 153
 154 include(APPPATH.'controllers/'.$RTR->fetch_directory().$RTR->fetch_class().EXT);
 155
 156 // Set a mark point for benchmarking
 157 $BM->mark('loading_time_base_classes_end');
 158
 159
 160 /*
 161  * ------------------------------------------------------
 162  *  Security check
 163  * ------------------------------------------------------
 164  *
 165  *  None of the functions in the app controller or the
 166  *  loader class can be called via the URI, nor can
 167  *  controller functions that begin with an underscore
 168  */
 169 $class  = $RTR->fetch_class();
 170 $method = $RTR->fetch_method();
 171
 172 if ( ! class_exists($class)
 173         OR $method == 'controller'
 174         OR strncmp($method, '_', 1) == 0
 175         OR in_array(strtolower($method), array_map('strtolower', get_class_methods('Controller')))
 176         )
 177 {
 178         show_404("{$class}/{$method}");
 179 }
 180
 181 /*
 182  * ------------------------------------------------------
 183  *  Is there a "pre_controller" hook?
 184  * ------------------------------------------------------
 185  */
 186 $EXT->_call_hook('pre_controller');
 187
 188 /*
 189  * ------------------------------------------------------
 190  *  Instantiate the controller and call requested method
 191  * ------------------------------------------------------
 192  */
 193
 194 // Mark a start point so we can benchmark the controller
 195 $BM->mark('controller_execution_time_( '.$class.' / '.$method.' )_start');
 196
 197 $CI = new $class();
 198
 199 // Is this a scaffolding request?
 200 if ($RTR->scaffolding_request === TRUE)
 201 {
 202         if ($EXT->_call_hook('scaffolding_override') === FALSE)
 203         {
 204                 $CI->_ci_scaffolding();
 205         }
 206 }
 207 else
 208 {
 209         /*
 210          * ------------------------------------------------------
 211          *  Is there a "post_controller_constructor" hook?
 212          * ------------------------------------------------------
 213          */
 214         $EXT->_call_hook('post_controller_constructor');
 215
 216         // Is there a "remap" function?
 217         if (method_exists($CI, '_remap'))
 218         {
 219                 $CI->_remap($method);
 220         }
 221         else
 222         {
 223                 // is_callable() returns TRUE on some versions of PHP 5 for private and protected
 224                 // methods, so we'll use this workaround for consistent behavior
 225                 if ( ! in_array(strtolower($method), array_map('strtolower', get_class_methods($CI))))
 226                 {
 227                         show_404("{$class}/{$method}");
 228                 }
 229
 230                 // Call the requested method.
 231                 // Any URI segments present (besides the class/function) will be passed to the method for convenience
 232                 call_user_func_array(array(&$CI, $method), array_slice($URI->rsegments, 2));
 233         }
 234 }
 235
 236 // Mark a benchmark end point
 237 $BM->mark('controller_execution_time_( '.$class.' / '.$method.' )_end');
 238
 239 /*
 240  * ------------------------------------------------------
 241  *  Is there a "post_controller" hook?
 242  * ------------------------------------------------------
 243  */
 244 $EXT->_call_hook('post_controller');
 245
 246 /*
 247  * ------------------------------------------------------
 248  *  Send the final rendered output to the browser
 249  * ------------------------------------------------------
 250  */
 251
 252 if ($EXT->_call_hook('display_override') === FALSE)
 253 {
 254         $OUT->_display();
 255 }
 256
 257 /*
 258  * ------------------------------------------------------
 259  *  Is there a "post_system" hook?
 260  * ------------------------------------------------------
 261  */
 262 $EXT->_call_hook('post_system');
 263
 264 /*
 265  * ------------------------------------------------------
 266  *  Close the DB connection if one exists
 267  * ------------------------------------------------------
 268  */
 269 if (class_exists('CI_DB') AND isset($CI->db))
 270 {
 271         $CI->db->close();
 272 }
 273
 274
 275 /* End of file CodeIgniter.php */
 276 /* Location: ./system/codeigniter/CodeIgniter.php */