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/** * List of paths to load libraries from * * @var array */ protected $_ci_library_paths = array(APPPATH, BASEPATH); /** * List of paths to load models from * * @var array */ protected $_ci_model_paths = array(APPPATH); /** * List of paths to load helpers from * * @var array */ protected $_ci_helper_paths = array(APPPATH, BASEPATH); /** * List of cached variables * * @var array */ protected $_ci_cached_vars = array(); /** * List of loaded classes * * @var array */ protected $_ci_classes = array(); /** * List of loaded models * * @var array */ protected $_ci_models = array(); /** * List of loaded helpers * * @var array */ protected $_ci_helpers = array(); /** * List of class name mappings * * @var array */ protected $_ci_varmap = array( 'unit_test' => 'unit', 'user_agent' => 'agent' ); // -------------------------------------------------------------------- /** * Class constructor * * Sets component load paths, gets the initial output buffering level. * * @return void */ public function __construct() { $this->_ci_ob_level = ob_get_level(); $this->_ci_classes =& is_loaded(); log_message('info', 'Loader Class Initialized'); } // -------------------------------------------------------------------- /** * Initializer * * @todo Figure out a way to move this to the constructor * without breaking *package_path*() methods. * @uses CI_Loader::_ci_autoloader() * @used-by CI_Controller::__construct() * @return void */ public function initialize() { $this->_ci_autoloader(); } // -------------------------------------------------------------------- /** * Is Loaded * * A utility method to test if a class is in the self::$_ci_classes array. * * @used-by Mainly used by Form Helper function _get_validation_object(). * * @param string $class Class name to check for * @return string|bool Class object name if loaded or FALSE */ public function is_loaded($class) { return array_search(ucfirst($class), $this->_ci_classes, TRUE); } // -------------------------------------------------------------------- /** * Library Loader * * Loads and instantiates libraries. * Designed to be called from application controllers. * * @param mixed $library Library name * @param array $params Optional parameters to pass to the library class constructor * @param string $object_name An optional object name to assign to * @return object */ public function library($library, $params = NULL, $object_name = NULL) { if (empty($library)) { return $this; } elseif (is_array($library)) { foreach ($library as $key => $value) { if (is_int($key)) { $this->library($value, $params); } else { $this->library($key, $params, $value); } } return $this; } if ($params !== NULL && ! is_array($params)) { $params = NULL; } $this->_ci_load_library($library, $params, $object_name); return $this; } // -------------------------------------------------------------------- /** * Model Loader * * Loads and instantiates models. * * @param mixed $model Model name * @param string $name An optional object name to assign to * @param bool $db_conn An optional database connection configuration to initialize * @return object */ public function model($model, $name = '', $db_conn = FALSE) { if (empty($model)) { return $this; } elseif (is_array($model)) { foreach ($model as $key => $value) { is_int($key) ? $this->model($value, '', $db_conn) : $this->model($key, $value, $db_conn); } return $this; } $path = ''; // Is the model in a sub-folder? If so, parse out the filename and path. if (($last_slash = strrpos($model, '/')) !== FALSE) { // The path is in front of the last slash $path = substr($model, 0, ++$last_slash); // And the model name behind it $model = substr($model, $last_slash); } if (empty($name)) { $name = $model; } if (in_array($name, $this->_ci_models, TRUE)) { return $this; } $CI =& get_instance(); if (isset($CI->$name)) { throw new RuntimeException('The model name you are loading is the name of a resource that is already being used: '.$name); } if ($db_conn !== FALSE && ! class_exists('CI_DB', FALSE)) { if ($db_conn === TRUE) { $db_conn = ''; } $this->database($db_conn, FALSE, TRUE); } // Note: All of the code under this condition used to be just: // // load_class('Model', 'core'); // // However, load_class() instantiates classes // to cache them for later use and that prevents // MY_Model from being an abstract class and is // sub-optimal otherwise anyway. if ( ! class_exists('CI_Model', FALSE)) { $app_path = APPPATH.'core'.DIRECTORY_SEPARATOR; if (file_exists($app_path.'Model.php')) { require_once($app_path.'Model.php'); if ( ! class_exists('CI_Model', FALSE)) { throw new RuntimeException($app_path."Model.php exists, but doesn't declare class CI_Model"); } log_message('info', 'CI_Model class loaded'); } elseif ( ! class_exists('CI_Model', FALSE)) { require_once(BASEPATH.'core'.DIRECTORY_SEPARATOR.'Model.php'); } $class = config_item('subclass_prefix').'Model'; if (file_exists($app_path.$class.'.php')) { require_once($app_path.$class.'.php'); if ( ! class_exists($class, FALSE)) { throw new RuntimeException($app_path.$class.".php exists, but doesn't declare class ".$class); } log_message('info', config_item('subclass_prefix').'Model class loaded'); } } $model = ucfirst($model); if ( ! class_exists($model, FALSE)) { foreach ($this->_ci_model_paths as $mod_path) { if ( ! file_exists($mod_path.'models/'.$path.$model.'.php')) { continue; } require_once($mod_path.'models/'.$path.$model.'.php'); if ( ! class_exists($model, FALSE)) { throw new RuntimeException($mod_path."models/".$path.$model.".php exists, but doesn't declare class ".$model); } break; } if ( ! class_exists($model, FALSE)) { throw new RuntimeException('Unable to locate the model you have specified: '.$model); } } elseif ( ! is_subclass_of($model, 'CI_Model')) { throw new RuntimeException("Class ".$model." already exists and doesn't extend CI_Model"); } $this->_ci_models[] = $name; $model = new $model(); $CI->$name = $model; log_message('info', 'Model "'.get_class($model).'" initialized'); return $this; } // -------------------------------------------------------------------- /** * Database Loader * * @param mixed $params Database configuration options * @param bool $return Whether to return the database object * @param bool $query_builder Whether to enable Query Builder * (overrides the configuration setting) * * @return object|bool Database object if $return is set to TRUE, * FALSE on failure, CI_Loader instance in any other case */ public function database($params = '', $return = FALSE, $query_builder = NULL) { // Grab the super object $CI =& get_instance(); // Do we even need to load the database class? if ($return === FALSE && $query_builder === NULL && isset($CI->db) && is_object($CI->db) && ! empty($CI->db->conn_id)) { return FALSE; } require_once(BASEPATH.'database/DB.php'); if ($return === TRUE) { return DB($params, $query_builder); } // Initialize the db variable. Needed to prevent // reference errors with some configurations $CI->db = ''; // Load the DB class $CI->db =& DB($params, $query_builder); return $this; } // -------------------------------------------------------------------- /** * Load the Database Utilities Class * * @param object $db Database object * @param bool $return Whether to return the DB Utilities class object or not * @return object */ public function dbutil($db = NULL, $return = FALSE) { $CI =& get_instance(); if ( ! is_object($db) OR ! ($db instanceof CI_DB)) { class_exists('CI_DB', FALSE) OR $this->database(); $db =& $CI->db; } require_once(BASEPATH.'database/DB_utility.php'); require_once(BASEPATH.'database/drivers/'.$db->dbdriver.'/'.$db->dbdriver.'_utility.php'); $class = 'CI_DB_'.$db->dbdriver.'_utility'; if ($return === TRUE) { return new $class($db); } $CI->dbutil = new $class($db); return $this; } // -------------------------------------------------------------------- /** * Load the Database Forge Class * * @param object $db Database object * @param bool $return Whether to return the DB Forge class object or not * @return object */ public function dbforge($db = NULL, $return = FALSE) { $CI =& get_instance(); if ( ! is_object($db) OR ! ($db instanceof CI_DB)) { class_exists('CI_DB', FALSE) OR $this->database(); $db =& $CI->db; } require_once(BASEPATH.'database/DB_forge.php'); require_once(BASEPATH.'database/drivers/'.$db->dbdriver.'/'.$db->dbdriver.'_forge.php'); if ( ! empty($db->subdriver)) { $driver_path = BASEPATH.'database/drivers/'.$db->dbdriver.'/subdrivers/'.$db->dbdriver.'_'.$db->subdriver.'_forge.php'; if (file_exists($driver_path)) { require_once($driver_path); $class = 'CI_DB_'.$db->dbdriver.'_'.$db->subdriver.'_forge'; } } else { $class = 'CI_DB_'.$db->dbdriver.'_forge'; } if ($return === TRUE) { return new $class($db); } $CI->dbforge = new $class($db); return $this; } // -------------------------------------------------------------------- /** * View Loader * * Loads "view" files. * * @param string $view View name * @param array $vars An associative array of data * to be extracted for use in the view * @param bool $return Whether to return the view output * or leave it to the Output class * @return object|string */ public function view($view, $vars = array(), $return = FALSE) { return $this->_ci_load(array('_ci_view' => $view, '_ci_vars' => $this->_ci_prepare_view_vars($vars), '_ci_return' => $return)); } // -------------------------------------------------------------------- /** * Generic File Loader * * @param string $path File path * @param bool $return Whether to return the file output * @return object|string */ public function file($path, $return = FALSE) { return $this->_ci_load(array('_ci_path' => $path, '_ci_return' => $return)); } // -------------------------------------------------------------------- /** * Set Variables * * Once variables are set they become available within * the controller class and its "view" files. * * @param array|object|string $vars * An associative array or object containing values * to be set, or a value's name if string * @param string $val Value to set, only used if $vars is a string * @return object */ public function vars($vars, $val = '') { $vars = is_string($vars) ? array($vars => $val) : $this->_ci_prepare_view_vars($vars); foreach ($vars as $key => $val) { $this->_ci_cached_vars[$key] = $val; } return $this; } // -------------------------------------------------------------------- /** * Clear Cached Variables * * Clears the cached variables. * * @return CI_Loader */ public function clear_vars() { $this->_ci_cached_vars = array(); return $this; } // -------------------------------------------------------------------- /** * Get Variable * * Check if a variable is set and retrieve it. * * @param string $key Variable name * @return mixed The variable or NULL if not found */ public function get_var($key) { return isset($this->_ci_cached_vars[$key]) ? $this->_ci_cached_vars[$key] : NULL; } // -------------------------------------------------------------------- /** * Get Variables * * Retrieves all loaded variables. * * @return array */ public function get_vars() { return $this->_ci_cached_vars; } // -------------------------------------------------------------------- /** * Helper Loader * * @param string|string[] $helpers Helper name(s) * @return object */ public function helper($helpers = array()) { is_array($helpers) OR $helpers = array($helpers); foreach ($helpers as &$helper) { $filename = basename($helper); $filepath = ($filename === $helper) ? '' : substr($helper, 0, strlen($helper) - strlen($filename)); $filename = strtolower(preg_replace('#(_helper)?(\.php)?$#i', '', $filename)).'_helper'; $helper = $filepath.$filename; if (isset($this->_ci_helpers[$helper])) { continue; } // Is this a helper extension request? $ext_helper = config_item('subclass_prefix').$filename; $ext_loaded = FALSE; foreach ($this->_ci_helper_paths as $path) { if (file_exists($path.'helpers/'.$ext_helper.'.php')) { include_once($path.'helpers/'.$ext_helper.'.php'); $ext_loaded = TRUE; } } // If we have loaded extensions - check if the base one is here if ($ext_loaded === TRUE) { $base_helper = BASEPATH.'helpers/'.$helper.'.php'; if ( ! file_exists($base_helper)) { show_error('Unable to load the requested file: helpers/'.$helper.'.php'); } include_once($base_helper); $this->_ci_helpers[$helper] = TRUE; log_message('info', 'Helper loaded: '.$helper); continue; } // No extensions found ... try loading regular helpers and/or overrides foreach ($this->_ci_helper_paths as $path) { if (file_exists($path.'helpers/'.$helper.'.php')) { include_once($path.'helpers/'.$helper.'.php'); $this->_ci_helpers[$helper] = TRUE; log_message('info', 'Helper loaded: '.$helper); break; } } // unable to load the helper if ( ! isset($this->_ci_helpers[$helper])) { show_error('Unable to load the requested file: helpers/'.$helper.'.php'); } } return $this; } // -------------------------------------------------------------------- /** * Load Helpers * * An alias for the helper() method in case the developer has * written the plural form of it. * * @uses CI_Loader::helper() * @param string|string[] $helpers Helper name(s) * @return object */ public function helpers($helpers = array()) { return $this->helper($helpers); } // -------------------------------------------------------------------- /** * Language Loader * * Loads language files. * * @param string|string[] $files List of language file names to load * @param string Language name * @return object */ public function language($files, $lang = '') { get_instance()->lang->load($files, $lang); return $this; } // -------------------------------------------------------------------- /** * Config Loader * * Loads a config file (an alias for CI_Config::load()). * * @uses CI_Config::load() * @param string $file Configuration file name * @param bool $use_sections Whether configuration values should be loaded into their own section * @param bool $fail_gracefully Whether to just return FALSE or display an error message * @return bool TRUE if the file was loaded correctly or FALSE on failure */ public function config($file, $use_sections = FALSE, $fail_gracefully = FALSE) { return get_instance()->config->load($file, $use_sections, $fail_gracefully); } // -------------------------------------------------------------------- /** * Driver Loader * * Loads a driver library. * * @param string|string[] $library Driver name(s) * @param array $params Optional parameters to pass to the driver * @param string $object_name An optional object name to assign to * * @return object|bool Object or FALSE on failure if $library is a string * and $object_name is set. CI_Loader instance otherwise. */ public function driver($library, $params = NULL, $object_name = NULL) { if (is_array($library)) { foreach ($library as $key => $value) { if (is_int($key)) { $this->driver($value, $params); } else { $this->driver($key, $params, $value); } } return $this; } elseif (empty($library)) { return FALSE; } if ( ! class_exists('CI_Driver_Library', FALSE)) { // We aren't instantiating an object here, just making the base class available require BASEPATH.'libraries/Driver.php'; } // We can save the loader some time since Drivers will *always* be in a subfolder, // and typically identically named to the library if ( ! strpos($library, '/')) { $library = ucfirst($library).'/'.$library; } return $this->library($library, $params, $object_name); } // -------------------------------------------------------------------- /** * Add Package Path * * Prepends a parent path to the library, model, helper and config * path arrays. * * @see CI_Loader::$_ci_library_paths * @see CI_Loader::$_ci_model_paths * @see CI_Loader::$_ci_helper_paths * @see CI_Config::$_config_paths * * @param string $path Path to add * @param bool $view_cascade (default: TRUE) * @return object */ public function add_package_path($path, $view_cascade = TRUE) { $path = rtrim($path, '/').'/'; array_unshift($this->_ci_library_paths, $path); array_unshift($this->_ci_model_paths, $path); array_unshift($this->_ci_helper_paths, $path); $this->_ci_view_paths = array($path.'views/' => $view_cascade) + $this->_ci_view_paths; // Add config file path $config =& $this->_ci_get_component('config'); $config->_config_paths[] = $path; return $this; } // -------------------------------------------------------------------- /** * Get Package Paths * * Return a list of all package paths. * * @param bool $include_base Whether to include BASEPATH (default: FALSE) * @return array */ public function get_package_paths($include_base = FALSE) { return ($include_base === TRUE) ? $this->_ci_library_paths : $this->_ci_model_paths; } // -------------------------------------------------------------------- /** * Remove Package Path * * Remove a path from the library, model, helper and/or config * path arrays if it exists. If no path is provided, the most recently * added path will be removed removed. * * @param string $path Path to remove * @return object */ public function remove_package_path($path = '') { $config =& $this->_ci_get_component('config'); if ($path === '') { array_shift($this->_ci_library_paths); array_shift($this->_ci_model_paths); array_shift($this->_ci_helper_paths); array_shift($this->_ci_view_paths); array_pop($config->_config_paths); } else { $path = rtrim($path, '/').'/'; foreach (array('_ci_library_paths', '_ci_model_paths', '_ci_helper_paths') as $var) { if (($key = array_search($path, $this->{$var})) !== FALSE) { unset($this->{$var}[$key]); } } if (isset($this->_ci_view_paths[$path.'views/'])) { unset($this->_ci_view_paths[$path.'views/']); } if (($key = array_search($path, $config->_config_paths)) !== FALSE) { unset($config->_config_paths[$key]); } } // make sure the application default paths are still in the array $this->_ci_library_paths = array_unique(array_merge($this->_ci_library_paths, array(APPPATH, BASEPATH))); $this->_ci_helper_paths = array_unique(array_merge($this->_ci_helper_paths, array(APPPATH, BASEPATH))); $this->_ci_model_paths = array_unique(array_merge($this->_ci_model_paths, array(APPPATH))); $this->_ci_view_paths = array_merge($this->_ci_view_paths, array(APPPATH.'views/' => TRUE)); $config->_config_paths = array_unique(array_merge($config->_config_paths, array(APPPATH))); return $this; } // -------------------------------------------------------------------- /** * Internal CI Data Loader * * Used to load views and files. * * Variables are prefixed with _ci_ to avoid symbol collision with * variables made available to view files. * * @used-by CI_Loader::view() * @used-by CI_Loader::file() * @param array $_ci_data Data to load * @return object */ protected function _ci_load($_ci_data) { // Set the default data variables foreach (array('_ci_view', '_ci_vars', '_ci_path', '_ci_return') as $_ci_val) { $$_ci_val = isset($_ci_data[$_ci_val]) ? $_ci_data[$_ci_val] : FALSE; } $file_exists = FALSE; // Set the path to the requested file if (is_string($_ci_path) && $_ci_path !== '') { $_ci_x = explode('/', $_ci_path); $_ci_file = end($_ci_x); } else { $_ci_ext = pathinfo($_ci_view, PATHINFO_EXTENSION); $_ci_file = ($_ci_ext === '') ? $_ci_view.'.php' : $_ci_view; foreach ($this->_ci_view_paths as $_ci_view_file => $cascade) { if (file_exists($_ci_view_file.$_ci_file)) { $_ci_path = $_ci_view_file.$_ci_file; $file_exists = TRUE; break; } if ( ! $cascade) { break; } } } if ( ! $file_exists && ! file_exists($_ci_path)) { show_error('Unable to load the requested file: '.$_ci_file); } // This allows anything loaded using $this->load (views, files, etc.) // to become accessible from within the Controller and Model functions. $_ci_CI =& get_instance(); foreach (get_object_vars($_ci_CI) as $_ci_key => $_ci_var) { if ( ! isset($this->$_ci_key)) { $this->$_ci_key =& $_ci_CI->$_ci_key; } } /* * Extract and cache variables * * You can either set variables using the dedicated $this->load->vars() * function or via the second parameter of this function. We'll merge * the two types and cache them so that views that are embedded within * other views can have access to these variables. */ empty($_ci_vars) OR $this->_ci_cached_vars = array_merge($this->_ci_cached_vars, $_ci_vars); extract($this->_ci_cached_vars); /* * Buffer the output * * We buffer the output for two reasons: * 1. Speed. You get a significant speed boost. * 2. So that the final rendered template can be post-processed by * the output class. Why do we need post processing? For one thing, * in order to show the elapsed page load time. Unless we can * intercept the content right before it's sent to the browser and * then stop the timer it won't be accurate. */ ob_start(); // If the PHP installation does not support short tags we'll // do a little string replacement, changing the short tags // to standard PHP echo statements. if ( ! is_php('5.4') && ! ini_get('short_open_tag') && config_item('rewrite_short_tags') === TRUE) { echo eval('?>'.preg_replace('/;*\s*\?>/', '; ?>', str_replace(' $this->_ci_ob_level + 1) { ob_end_flush(); } else { $_ci_CI->output->append_output(ob_get_contents()); @ob_end_clean(); } return $this; } // -------------------------------------------------------------------- /** * Internal CI Library Loader * * @used-by CI_Loader::library() * @uses CI_Loader::_ci_init_library() * * @param string $class Class name to load * @param mixed $params Optional parameters to pass to the class constructor * @param string $object_name Optional object name to assign to * @return void */ protected function _ci_load_library($class, $params = NULL, $object_name = NULL) { // Get the class name, and while we're at it trim any slashes. // The directory path can be included as part of the class name, // but we don't want a leading slash $class = str_replace('.php', '', trim($class, '/')); // Was the path included with the class name? // We look for a slash to determine this if (($last_slash = strrpos($class, '/')) !== FALSE) { // Extract the path $subdir = substr($class, 0, ++$last_slash); // Get the filename from the path $class = substr($class, $last_slash); } else { $subdir = ''; } $class = ucfirst($class); // Is this a stock library? There are a few special conditions if so ... if (file_exists(BASEPATH.'libraries/'.$subdir.$class.'.php')) { return $this->_ci_load_stock_library($class, $subdir, $params, $object_name); } // Safety: Was the class already loaded by a previous call? if (class_exists($class, FALSE)) { $property = $object_name; if (empty($property)) { $property = strtolower($class); isset($this->_ci_varmap[$property]) && $property = $this->_ci_varmap[$property]; } $CI =& get_instance(); if (isset($CI->$property)) { log_message('debug', $class.' class already loaded. Second attempt ignored.'); return; } return $this->_ci_init_library($class, '', $params, $object_name); } // Let's search for the requested library file and load it. foreach ($this->_ci_library_paths as $path) { // BASEPATH has already been checked for if ($path === BASEPATH) { continue; } $filepath = $path.'libraries/'.$subdir.$class.'.php'; // Does the file exist? No? Bummer... if ( ! file_exists($filepath)) { continue; } include_once($filepath); return $this->_ci_init_library($class, '', $params, $object_name); } // One last attempt. Maybe the library is in a subdirectory, but it wasn't specified? if ($subdir === '') { return $this->_ci_load_library($class.'/'.$class, $params, $object_name); } // If we got this far we were unable to find the requested class. log_message('error', 'Unable to load the requested class: '.$class); show_error('Unable to load the requested class: '.$class); } // -------------------------------------------------------------------- /** * Internal CI Stock Library Loader * * @used-by CI_Loader::_ci_load_library() * @uses CI_Loader::_ci_init_library() * * @param string $library_name Library name to load * @param string $file_path Path to the library filename, relative to libraries/ * @param mixed $params Optional parameters to pass to the class constructor * @param string $object_name Optional object name to assign to * @return void */ protected function _ci_load_stock_library($library_name, $file_path, $params, $object_name) { $prefix = 'CI_'; if (class_exists($prefix.$library_name, FALSE)) { if (class_exists(config_item('subclass_prefix').$library_name, FALSE)) { $prefix = config_item('subclass_prefix'); } $property = $object_name; if (empty($property)) { $property = strtolower($library_name); isset($this->_ci_varmap[$property]) && $property = $this->_ci_varmap[$property]; } $CI =& get_instance(); if ( ! isset($CI->$property)) { return $this->_ci_init_library($library_name, $prefix, $params, $object_name); } log_message('debug', $library_name.' class already loaded. Second attempt ignored.'); return; } $paths = $this->_ci_library_paths; array_pop($paths); // BASEPATH array_pop($paths); // APPPATH (needs to be the first path checked) array_unshift($paths, APPPATH); foreach ($paths as $path) { if (file_exists($path = $path.'libraries/'.$file_path.$library_name.'.php')) { // Override include_once($path); if (class_exists($prefix.$library_name, FALSE)) { return $this->_ci_init_library($library_name, $prefix, $params, $object_name); } log_message('debug', $path.' exists, but does not declare '.$prefix.$library_name); } } include_once(BASEPATH.'libraries/'.$file_path.$library_name.'.php'); // Check for extensions $subclass = config_item('subclass_prefix').$library_name; foreach ($paths as $path) { if (file_exists($path = $path.'libraries/'.$file_path.$subclass.'.php')) { include_once($path); if (class_exists($subclass, FALSE)) { $prefix = config_item('subclass_prefix'); break; } log_message('debug', $path.' exists, but does not declare '.$subclass); } } return $this->_ci_init_library($library_name, $prefix, $params, $object_name); } // -------------------------------------------------------------------- /** * Internal CI Library Instantiator * * @used-by CI_Loader::_ci_load_stock_library() * @used-by CI_Loader::_ci_load_library() * * @param string $class Class name * @param string $prefix Class name prefix * @param array|null|bool $config Optional configuration to pass to the class constructor: * FALSE to skip; * NULL to search in config paths; * array containing configuration data * @param string $object_name Optional object name to assign to * @return void */ protected function _ci_init_library($class, $prefix, $config = FALSE, $object_name = NULL) { // Is there an associated config file for this class? Note: these should always be lowercase if ($config === NULL) { // Fetch the config paths containing any package paths $config_component = $this->_ci_get_component('config'); if (is_array($config_component->_config_paths)) { $found = FALSE; foreach ($config_component->_config_paths as $path) { // We test for both uppercase and lowercase, for servers that // are case-sensitive with regard to file names. Load global first, // override with environment next if (file_exists($path.'config/'.strtolower($class).'.php')) { include($path.'config/'.strtolower($class).'.php'); $found = TRUE; } elseif (file_exists($path.'config/'.ucfirst(strtolower($class)).'.php')) { include($path.'config/'.ucfirst(strtolower($class)).'.php'); $found = TRUE; } if (file_exists($path.'config/'.ENVIRONMENT.'/'.strtolower($class).'.php')) { include($path.'config/'.ENVIRONMENT.'/'.strtolower($class).'.php'); $found = TRUE; } elseif (file_exists($path.'config/'.ENVIRONMENT.'/'.ucfirst(strtolower($class)).'.php')) { include($path.'config/'.ENVIRONMENT.'/'.ucfirst(strtolower($class)).'.php'); $found = TRUE; } // Break on the first found configuration, thus package // files are not overridden by default paths if ($found === TRUE) { break; } } } } $class_name = $prefix.$class; // Is the class name valid? if ( ! class_exists($class_name, FALSE)) { log_message('error', 'Non-existent class: '.$class_name); show_error('Non-existent class: '.$class_name); } // Set the variable name we will assign the class to // Was a custom class name supplied? If so we'll use it if (empty($object_name)) { $object_name = strtolower($class); if (isset($this->_ci_varmap[$object_name])) { $object_name = $this->_ci_varmap[$object_name]; } } // Don't overwrite existing properties $CI =& get_instance(); if (isset($CI->$object_name)) { if ($CI->$object_name instanceof $class_name) { log_message('debug', $class_name." has already been instantiated as '".$object_name."'. Second attempt aborted."); return; } show_error("Resource '".$object_name."' already exists and is not a ".$class_name." instance."); } // Save the class name and object name $this->_ci_classes[$object_name] = $class; // Instantiate the class $CI->$object_name = isset($config) ? new $class_name($config) : new $class_name(); } // -------------------------------------------------------------------- /** * CI Autoloader * * Loads component listed in the config/autoload.php file. * * @used-by CI_Loader::initialize() * @return void */ protected function _ci_autoloader() { if (file_exists(APPPATH.'config/autoload.php')) { include(APPPATH.'config/autoload.php'); } if (file_exists(APPPATH.'config/'.ENVIRONMENT.'/autoload.php')) { include(APPPATH.'config/'.ENVIRONMENT.'/autoload.php'); } if ( ! isset($autoload)) { return; } // Autoload packages if (isset($autoload['packages'])) { foreach ($autoload['packages'] as $package_path) { $this->add_package_path($package_path); } } // Load any custom config file if (count($autoload['config']) > 0) { foreach ($autoload['config'] as $val) { $this->config($val); } } // Autoload helpers and languages foreach (array('helper', 'language') as $type) { if (isset($autoload[$type]) && count($autoload[$type]) > 0) { $this->$type($autoload[$type]); } } // Autoload drivers if (isset($autoload['drivers'])) { $this->driver($autoload['drivers']); } // Load libraries if (isset($autoload['libraries']) && count($autoload['libraries']) > 0) { // Load the database driver. if (in_array('database', $autoload['libraries'])) { $this->database(); $autoload['libraries'] = array_diff($autoload['libraries'], array('database')); } // Load all other libraries $this->library($autoload['libraries']); } // Autoload models if (isset($autoload['model'])) { $this->model($autoload['model']); } } // -------------------------------------------------------------------- /** * Prepare variables for _ci_vars, to be later extract()-ed inside views * * Converts objects to associative arrays and filters-out internal * variable names (i.e. keys prefixed with '_ci_'). * * @param mixed $vars * @return array */ protected function _ci_prepare_view_vars($vars) { if ( ! is_array($vars)) { $vars = is_object($vars) ? get_object_vars($vars) : array(); } foreach (array_keys($vars) as $key) { if (strncmp($key, '_ci_', 4) === 0) { unset($vars[$key]); } } return $vars; } // -------------------------------------------------------------------- /** * CI Component getter * * Get a reference to a specific library or model. * * @param string $component Component name * @return bool */ protected function &_ci_get_component($component) { $CI =& get_instance(); return $CI->$component; } }