Source/carbon/core/Common.php

   1 <?php
   2 /*------------------------------------------------------------
   3 *  CarbonPHP framework (C) Tom Bell
   4 *  http://tombell.org.uk
   5 *------------------------------------------------------------*/
   6
   7 if (!defined('CARBON_PATH'))
   8 {
   9         exit('Direct script access is not allowed.');
  10 }
  11
  12 function & load_class($class_name, $instantiate = true)
  13 {
  14         static $class_objects = array();
  15
  16         if (isset($class_objects[$class_name]))
  17         {
  18                 return $class_objects[$class_name];
  19         }
  20
  21         if (file_exists(APP_PATH . 'libraries/' . get_config_item('subclass_prefix') . $class_name . FILE_EXT))
  22         {
  23                 require(CARBON_PATH . 'libraries/' . $class_name . FILE_EXT);
  24                 require(APP_PATH . 'libraries/' . get_config_item('subclass_prexfix') . $class_name . FILE_EXT);
  25                 $is_subclass = true;
  26         }
  27         else
  28         {
  29                 if (file_exists(APP_PATH . 'libraries/' . $class_name . FILE_EXT))
  30                 {
  31                         require(APP_PATH . 'libraries/' . $class_name . FILE_EXT);
  32                         $is_subclass = false;
  33                 }
  34                 else
  35                 {
  36                         require(CARBON_PATH . 'libraries/' . $class_name . FILE_EXT);
  37                         $is_subclass = false;
  38                 }
  39         }
  40
  41         if ($instantiate == false)
  42         {
  43                 $class_objects[$class_name] = true;
  44                 return $class_objects[$class_name];
  45         }
  46
  47         if ($is_subclass == true)
  48         {
  49                 $full_class_name = get_config_item('subclass_prefix') . $class_name;
  50                 $class_objects[$class_name] = new $full_class_name();
  51                 return $class_objects[$class_name];
  52         }
  53
  54         $full_class_name = ($class_name != 'Controller') ? 'Carbon_' . $class_name : $class_name;
  55         $class_objects[$class_name] = new $full_class_name();
  56         return $class_objects[$class_name];
  57 }
  58
  59 function & load_config()
  60 {
  61         static $carbon_config;
  62
  63         if (isset($carbon_config))
  64         {
  65                 return $carbon_config[0];
  66         }
  67
  68         if (!file_exists(APP_PATH . 'config/config' . FILE_EXT))
  69         {
  70                 exit('The CarbonPHP configuration file does not exist: config' . FILE_EXT);
  71         }
  72
  73         require(APP_PATH . 'config/config' . FILE_EXT);
  74
  75         if (!isset($config) || !is_array($config))
  76         {
  77                 exit('The CarbonPHP configuration file is incorrectly formatted: config' . FILE_EXT);
  78         }
  79
  80         $carbon_config[0] =  $config;
  81         return $carbon_config[0];
  82 }
  83
  84 function get_config_item($config_item)
  85 {
  86         static $config_items = array();
  87
  88         if (isset($config_items[$config_item]))
  89         {
  90                 return $config_items[$config_item];
  91         }
  92
  93         $config =& load_config();
  94
  95         if (!isset($config[$config_item]))
  96         {
  97                 return false;
  98         }
  99
 100         $config_items[$config_item] = $config[$config_item];
 101         return $config_items[$config_item];
 102 }
 103
 104 function display_error($error_message)
 105 {
 106         $exception =& load_class('Exception');
 107         echo $exception->display_error('An error has been encountered', $error_message);
 108         exit();
 109 }
 110
 111 function display_not_found($page = '')
 112 {
 113         $exception =& load_class('Exception');
 114         $exception->display_not_found($page);
 115         exit();
 116 }
 117
 118 function log_message($level = 'error', $message, $php_error = false)
 119 {
 120         static $logging;
 121         $config =& load_config();
 122
 123         if (get_config_item('logging_threshold') == 0)
 124         {
 125                 return false;
 126         }
 127
 128         $logging =& load_class('Logging');
 129         $logging->write_log_message($level, $message, $php_error);
 130 }
 131
 132 function exception_handler($severity, $message, $file_path, $line_number)
 133 {
 134         if ($severity == E_STRICT)
 135         {
 136                 return true;
 137         }
 138
 139         $exception =& load_class('Exception');
 140
 141         if (($severity & error_reporting()) == $severity)
 142         {
 143                 $exception->display_php_error($severity, $message, $file_path, $line_number);
 144         }
 145
 146         $config =& load_config();
 147
 148         if (get_config_item('logging_threshold') == 0)
 149         {
 150                 return true;
 151         }
 152
 153         $exception->log_exception($severity, $message, $file_path, $line_number);
 154 }
 155
 156 ?>