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\/**\n * Class constructor\n *\n * @return void\n *\/\n public function __construct()\n {\n self::$instance =& $this;\n\n \/\/ Assign all the class objects that were instantiated by the\n \/\/ bootstrap file (CodeIgniter.php) to local class variables\n \/\/ so that CI can run as one big super object.\n foreach (is_loaded() as $var => $class)\n {\n $this->$var =& load_class($class);\n }\n\n $this->load =& load_class('Loader', 'core');\n $this->load->initialize();\n log_message('info', 'Controller Class Initialized');\n }\n<\/code><\/pre>\n\u770b\u4e00\u4e0bLoader\u6e90\u7801\u5c31\u77e5\u9053$this->load->initialize();\u8fd9\u4e2a\u51fd\u6570\u53ea\u6709\u4e00\u53e5\u4ee3\u7801<\/p>\n
\/**\n * Initializer\n *\n * @todo Figure out a way to move this to the constructor\n * without breaking *package_path*() methods.\n * @uses CI_Loader::_ci_autoloader()\n * @used-by CI_Controller::__construct()\n * @return void\n *\/\n public function initialize()\n {\n $this->_ci_autoloader();\n }\n<\/code><\/pre>\n\u7531\u6b64\u6211\u4eec\u53ef\u77e5\uff0c\u81ea\u52a8\u52a0\u8f7d\u662f\u5728\u63a7\u5236\u5668\u7684\u88ab\u521b\u5efa\u7684\u65f6\u5019\u53d1\u751f\u7684\uff0c\u90a3\u4e48\u81ea\u52a8\u52a0\u8f7d\u5177\u4f53\u662f\u600e\u4e48\u5b9e\u73b0\u7684\u5462\uff1f\u8fd9\u5c31\u8981\u770b_ci_autoloader\u51fd\u6570\u7684\u4ee3\u7801\u4e86\uff1a<\/p>\n
\/**\n * CI Autoloader\n *\n * Loads component listed in the config\/autoload.php file.\n *\n * @used-by CI_Loader::initialize()\n * @return void\n *\/\n protected function _ci_autoloader()\n {\n if (file_exists(APPPATH.'config\/autoload.php'))\n {\n include(APPPATH.'config\/autoload.php');\n }\n\n if (file_exists(APPPATH.'config\/'.ENVIRONMENT.'\/autoload.php'))\n {\n include(APPPATH.'config\/'.ENVIRONMENT.'\/autoload.php');\n }\n\n if ( ! isset($autoload))\n {\n return;\n }\n\n \/\/ Autoload packages\n if (isset($autoload['packages']))\n {\n foreach ($autoload['packages'] as $package_path)\n {\n $this->add_package_path($package_path);\n }\n }\n\n \/\/ Load any custom config file\n if (count($autoload['config']) > 0)\n {\n foreach ($autoload['config'] as $val)\n {\n $this->config($val);\n }\n }\n\n \/\/ Autoload helpers and languages\n foreach (array('helper', 'language') as $type)\n {\n if (isset($autoload[$type]) && count($autoload[$type]) > 0)\n {\n $this->$type($autoload[$type]);\n }\n }\n\n \/\/ Autoload drivers\n if (isset($autoload['drivers']))\n {\n $this->driver($autoload['drivers']);\n }\n\n \/\/ Load libraries\n if (isset($autoload['libraries']) && count($autoload['libraries']) > 0)\n {\n \/\/ Load the database driver.\n if (in_array('database', $autoload['libraries']))\n {\n $this->database();\n $autoload['libraries'] = array_diff($autoload['libraries'], array('database'));\n }\n\n \/\/ Load all other libraries\n $this->library($autoload['libraries']);\n }\n\n \/\/ Autoload models\n if (isset($autoload['model']))\n {\n $this->model($autoload['model']);\n }\n }\n<\/code><\/pre>\n2.\u89c6\u56fe\u52a0\u8f7d<\/h3>\n \/**\n * View Loader\n *\n * Loads \"view\" files.\n *\n * @param string $view View name\n * @param array $vars An associative array of data\n * to be extracted for use in the view\n * @param bool $return Whether to return the view output\n * or leave it to the Output class\n * @return object|string\n *\/\n public function view($view, $vars = array(), $return = FALSE)\n {\n return $this->_ci_load(array('_ci_view' => $view, '_ci_vars' => $this->_ci_prepare_view_vars($vars), '_ci_return' => $return));\n }\n\n<\/code><\/pre>\n \/**\n * Internal CI Data Loader\n *\n * Used to load views and files.\n *\n * Variables are prefixed with _ci_ to avoid symbol collision with\n * variables made available to view files.\n *\n * @used-by CI_Loader::view()\n * @used-by CI_Loader::file()\n * @param array $_ci_data Data to load\n * @return object\n *\/\n protected function _ci_load($_ci_data)\n {\n \/\/ Set the default data variables\n foreach (array('_ci_view', '_ci_vars', '_ci_path', '_ci_return') as $_ci_val)\n {\n $$_ci_val = isset($_ci_data[$_ci_val]) ? $_ci_data[$_ci_val] : FALSE;\n }\n\n $file_exists = FALSE;\n\n \/\/ Set the path to the requested file\n if (is_string($_ci_path) && $_ci_path !== '')\n {\n $_ci_x = explode('\/', $_ci_path);\n $_ci_file = end($_ci_x);\n }\n else\n {\n $_ci_ext = pathinfo($_ci_view, PATHINFO_EXTENSION);\n $_ci_file = ($_ci_ext === '') ? $_ci_view.'.php' : $_ci_view;\n\n foreach ($this->_ci_view_paths as $_ci_view_file => $cascade)\n {\n if (file_exists($_ci_view_file.$_ci_file))\n {\n $_ci_path = $_ci_view_file.$_ci_file;\n $file_exists = TRUE;\n break;\n }\n\n if ( ! $cascade)\n {\n break;\n }\n }\n }\n\n if ( ! $file_exists && ! file_exists($_ci_path))\n {\n show_error('Unable to load the requested file: '.$_ci_file);\n }\n\n \/\/ This allows anything loaded using $this->load (views, files, etc.)\n \/\/ to become accessible from within the Controller and Model functions.\n $_ci_CI =& get_instance();\n foreach (get_object_vars($_ci_CI) as $_ci_key => $_ci_var)\n {\n if ( ! isset($this->$_ci_key))\n {\n $this->$_ci_key =& $_ci_CI->$_ci_key;\n }\n }\n\n \/*\n * Extract and cache variables\n *\n * You can either set variables using the dedicated $this->load->vars()\n * function or via the second parameter of this function. We'll merge\n * the two types and cache them so that views that are embedded within\n * other views can have access to these variables.\n *\/\n empty($_ci_vars) OR $this->_ci_cached_vars = array_merge($this->_ci_cached_vars, $_ci_vars);\n extract($this->_ci_cached_vars);\n\n \/*\n * Buffer the output\n *\n * We buffer the output for two reasons:\n * 1. Speed. You get a significant speed boost.\n * 2. So that the final rendered template can be post-processed by\n * the output class. Why do we need post processing? For one thing,\n * in order to show the elapsed page load time. Unless we can\n * intercept the content right before it's sent to the browser and\n * then stop the timer it won't be accurate.\n *\/\n ob_start();\n\n \/\/ If the PHP installation does not support short tags we'll\n \/\/ do a little string replacement, changing the short tags\n \/\/ to standard PHP echo statements.\n if ( ! is_php('5.4') && ! ini_get('short_open_tag') && config_item('rewrite_short_tags') === TRUE)\n {\n echo eval('?>'.preg_replace('\/;*\\s*\\?>\/', '; ?>', str_replace('<?=', '<?php echo ', file_get_contents($_ci_path))));\n }\n else\n {\n include($_ci_path); \/\/ include() vs include_once() allows for multiple views with the same name\n }\n\n log_message('info', 'File loaded: '.$_ci_path);\n\n \/\/ Return the file data if requested\n if ($_ci_return === TRUE)\n {\n $buffer = ob_get_contents();\n @ob_end_clean();\n return $buffer;\n }\n\n \/*\n * Flush the buffer... or buff the flusher?\n *\n * In order to permit views to be nested within\n * other views, we need to flush the content back out whenever\n * we are beyond the first level of output buffering so that\n * it can be seen and included properly by the first included\n * template and any subsequent ones. Oy!\n *\/\n if (ob_get_level() > $this->_ci_ob_level + 1)\n {\n ob_end_flush();\n }\n else\n {\n $_ci_CI->output->append_output(ob_get_contents());\n @ob_end_clean();\n }\n\n return $this;\n }\n<\/code><\/pre>\n\u7531\u4ee5\u4e0a\u6e90\u7801\u53ef\u77e5\uff1a<\/strong>
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