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 - 2009, 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',    '1.7.2');
  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
  61 if ( ! is_php('5.3'))
  62 {
  63         @set_magic_quotes_runtime(0); // Kill magic quotes
  64 }
  65
  66 /*
  67  * ------------------------------------------------------
  68  *  Start the timer... tick tock tick tock...
  69  * ------------------------------------------------------
  70  */
  71
  72 $BM =& load_class('Benchmark');
  73 $BM->mark('total_execution_time_start');
  74 $BM->mark('loading_time_base_classes_start');
  75
  76 /*
  77  * ------------------------------------------------------
  78  *  Instantiate the hooks class
  79  * ------------------------------------------------------
  80  */
  81
  82 $EXT =& load_class('Hooks');
  83
  84 /*
  85  * ------------------------------------------------------
  86  *  Is there a "pre_system" hook?
  87  * ------------------------------------------------------
  88  */
  89 $EXT->_call_hook('pre_system');
  90
  91 /*
  92  * ------------------------------------------------------
  93  *  Instantiate the base classes
  94  * ------------------------------------------------------
  95  */
  96
  97 $CFG =& load_class('Config');
  98 $URI =& load_class('URI');
  99 $RTR =& load_class('Router');
 100 $OUT =& load_class('Output');
 101
 102 /*
 103  * ------------------------------------------------------
 104  *      Is there a valid cache file?  If so, we're done...
 105  * ------------------------------------------------------
 106  */
 107
 108 if ($EXT->_call_hook('cache_override') === FALSE)
 109 {
 110         if ($OUT->_display_cache($CFG, $URI) == TRUE)
 111         {
 112                 exit;
 113         }
 114 }
 115
 116 /*
 117  * ------------------------------------------------------
 118  *  Load the remaining base classes
 119  * ------------------------------------------------------
 120  */
 121
 122 $IN             =& load_class('Input');
 123 $LANG   =& load_class('Language');
 124
 125 /*
 126  * ------------------------------------------------------
 127  *  Load the app controller and local controller
 128  * ------------------------------------------------------
 129  *
 130  *  Note: Due to the poor object handling in PHP 4 we'll
 131  *  conditionally load different versions of the base
 132  *  class.  Retaining PHP 4 compatibility requires a bit of a hack.
 133  *
 134  *  Note: The Loader class needs to be included first
 135  *
 136  */
 137 if ( ! is_php('5.0.0'))
 138 {
 139         load_class('Loader', FALSE);
 140         require(BASEPATH.'codeigniter/Base4'.EXT);
 141 }
 142 else
 143 {
 144         require(BASEPATH.'codeigniter/Base5'.EXT);
 145 }
 146
 147 // Load the base controller class
 148 load_class('Controller', FALSE);
 149
 150 // Load the local application controller
 151 // Note: The Router class automatically validates the controller path.  If this include fails it
 152 // means that the default controller in the Routes.php file is not resolving to something valid.
 153 if ( ! file_exists(APPPATH.'controllers/'.$RTR->fetch_directory().$RTR->fetch_class().EXT))
 154 {
 155         show_error('Unable to load your default controller.  Please make sure the controller specified in your Routes.php file is valid.');
 156 }
 157
 158 include(APPPATH.'controllers/'.$RTR->fetch_directory().$RTR->fetch_class().EXT);
 159
 160 // Set a mark point for benchmarking
 161 $BM->mark('loading_time_base_classes_end');
 162
 163
 164 /*
 165  * ------------------------------------------------------
 166  *  Security check
 167  * ------------------------------------------------------
 168  *
 169  *  None of the functions in the app controller or the
 170  *  loader class can be called via the URI, nor can
 171  *  controller functions that begin with an underscore
 172  */
 173 $class  = $RTR->fetch_class();
 174 $method = $RTR->fetch_method();
 175
 176 if ( ! class_exists($class)
 177         OR $method == 'controller'
 178         OR strncmp($method, '_', 1) == 0
 179         OR in_array(strtolower($method), array_map('strtolower', get_class_methods('Controller')))
 180         )
 181 {
 182         show_404("{$class}/{$method}");
 183 }
 184
 185 /*
 186  * ------------------------------------------------------
 187  *  Is there a "pre_controller" hook?
 188  * ------------------------------------------------------
 189  */
 190 $EXT->_call_hook('pre_controller');
 191
 192 /*
 193  * ------------------------------------------------------
 194  *  Instantiate the controller and call requested method
 195  * ------------------------------------------------------
 196  */
 197
 198 // Mark a start point so we can benchmark the controller
 199 $BM->mark('controller_execution_time_( '.$class.' / '.$method.' )_start');
 200
 201 $CI = new $class();
 202
 203 // Is this a scaffolding request?
 204 if ($RTR->scaffolding_request === TRUE)
 205 {
 206         if ($EXT->_call_hook('scaffolding_override') === FALSE)
 207         {
 208                 $CI->_ci_scaffolding();
 209         }
 210 }
 211 else
 212 {
 213         /*
 214          * ------------------------------------------------------
 215          *  Is there a "post_controller_constructor" hook?
 216          * ------------------------------------------------------
 217          */
 218         $EXT->_call_hook('post_controller_constructor');
 219
 220         // Is there a "remap" function?
 221         if (method_exists($CI, '_remap'))
 222         {
 223                 $CI->_remap($method);
 224         }
 225         else
 226         {
 227                 // is_callable() returns TRUE on some versions of PHP 5 for private and protected
 228                 // methods, so we'll use this workaround for consistent behavior
 229                 if ( ! in_array(strtolower($method), array_map('strtolower', get_class_methods($CI))))
 230                 {
 231                         show_404("{$class}/{$method}");
 232                 }
 233
 234                 // Call the requested method.
 235                 // Any URI segments present (besides the class/function) will be passed to the method for convenience
 236                 call_user_func_array(array(&$CI, $method), array_slice($URI->rsegments, 2));
 237         }
 238 }
 239
 240 // Mark a benchmark end point
 241 $BM->mark('controller_execution_time_( '.$class.' / '.$method.' )_end');
 242
 243 /*
 244  * ------------------------------------------------------
 245  *  Is there a "post_controller" hook?
 246  * ------------------------------------------------------
 247  */
 248 $EXT->_call_hook('post_controller');
 249
 250 /*
 251  * ------------------------------------------------------
 252  *  Send the final rendered output to the browser
 253  * ------------------------------------------------------
 254  */
 255
 256 if ($EXT->_call_hook('display_override') === FALSE)
 257 {
 258         $OUT->_display();
 259 }
 260
 261 /*
 262  * ------------------------------------------------------
 263  *  Is there a "post_system" hook?
 264  * ------------------------------------------------------
 265  */
 266 $EXT->_call_hook('post_system');
 267
 268 /*
 269  * ------------------------------------------------------
 270  *  Close the DB connection if one exists
 271  * ------------------------------------------------------
 272  */
 273 if (class_exists('CI_DB') AND isset($CI->db))
 274 {
 275         $CI->db->close();
 276 }
 277
 278
 279 /* End of file CodeIgniter.php */
 280 /* Location: ./system/codeigniter/CodeIgniter.php */