diff options
Diffstat (limited to 'system')
| -rw-r--r-- | system/core/Loader.php | 286 |
1 files changed, 152 insertions, 134 deletions
diff --git a/system/core/Loader.php b/system/core/Loader.php index b316c8e1b..db56ab3ae 100644 --- a/system/core/Loader.php +++ b/system/core/Loader.php @@ -28,7 +28,7 @@ /** * Loader Class * - * Loads views and files + * Loads framework components. * * @package CodeIgniter * @subpackage Libraries @@ -42,84 +42,84 @@ class CI_Loader { /** * Nesting level of the output buffering mechanism * - * @var int + * @var int */ protected $_ci_ob_level; /** * List of paths to load views from * - * @var array + * @var array */ protected $_ci_view_paths = array(); /** * List of paths to load libraries from * - * @var array + * @var array */ protected $_ci_library_paths = array(); /** * List of paths to load models from * - * @var array + * @var array */ protected $_ci_model_paths = array(); /** * List of paths to load helpers from * - * @var array + * @var array */ protected $_ci_helper_paths = array(); /** * List of loaded base classes * - * @var array + * @var array */ protected $_base_classes = array(); // Set by the controller class /** * List of cached variables * - * @var array + * @var array */ protected $_ci_cached_vars = array(); /** * List of loaded classes * - * @var array + * @var array */ protected $_ci_classes = array(); /** * List of loaded files * - * @var array + * @var array */ protected $_ci_loaded_files = array(); /** * List of loaded models * - * @var array + * @var array */ protected $_ci_models = array(); /** * List of loaded helpers * - * @var array + * @var array */ protected $_ci_helpers = array(); /** * List of class name mappings * - * @var array + * @var array */ protected $_ci_varmap = array( 'unit_test' => 'unit', @@ -127,9 +127,9 @@ class CI_Loader { ); /** - * Constructor + * Class constructor * - * Sets the path to the view files and gets the initial output buffering level + * Sets component load paths gets the initial output buffering level. * * @return void */ @@ -149,9 +149,9 @@ class CI_Loader { /** * Initialize the Loader * - * This method is called once in CI_Controller. - * - * @return object + * @used-by CI_Controller + * @uses CI_Loader::_ci_autoloader() + * @return object $this */ public function initialize() { @@ -169,14 +169,12 @@ class CI_Loader { /** * Is Loaded * - * A utility function to test if a class is in the self::$_ci_classes array. - * This function returns the object name if the class tested for is loaded, - * and returns FALSE if it isn't. + * A utility method to test if a class is in the self::$_ci_classes array. * - * It is mainly used in the form_helper -> _get_validation_object() + * @used-by Mainly used by Form Helper function _get_validation_object(). * - * @param string class being checked for - * @return mixed class object name on the CI SuperObject or FALSE + * @param string $class Class name to check for + * @return string|bool Class object name if loaded or FALSE */ public function is_loaded($class) { @@ -186,14 +184,14 @@ class CI_Loader { // -------------------------------------------------------------------- /** - * Class Loader + * Library Loader * - * This function lets users load and instantiate classes. - * It is designed to be called from a user's app controllers. + * Loads and instantiates libraries. + * Designed to be called from application controllers. * - * @param string the name of the class - * @param mixed the optional parameters - * @param string an optional object name + * @param string $library Library name + * @param array $params Optional parameters to pass to the library class constructor + * @param string $object_name An optional object name to assign to * @return void */ public function library($library = '', $params = NULL, $object_name = NULL) @@ -210,7 +208,7 @@ class CI_Loader { if ($library === '' OR isset($this->_base_classes[$library])) { - return FALSE; + return; } if ( ! is_null($params) && ! is_array($params)) @@ -226,16 +224,20 @@ class CI_Loader { /** * Model Loader * - * This function lets users load and instantiate models. + * Loads and instantiates libraries. * - * @param string the name of the class - * @param string name for the model - * @param bool database connection + * @param string $model Model name + * @param string $name An optional object name to assign to + * @param bool $db_conn An optional database connection configuration to initialize * @return void */ public function model($model, $name = '', $db_conn = FALSE) { - if (is_array($model)) + if (empty($model)) + { + return; + } + elseif (is_array($model)) { foreach ($model as $class) { @@ -244,11 +246,6 @@ class CI_Loader { return; } - if ($model === '') - { - return; - } - $path = ''; // Is the model in a sub-folder? If so, parse out the filename and path. @@ -318,10 +315,13 @@ class CI_Loader { /** * Database Loader * - * @param mixed $params = '' the DB settings - * @param bool $return = FALSE whether to return the DB object - * @param bool $query_builder = NULL whether to enable query builder (overrides the config setting) - * @return object + * @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 void|object|bool Database object if $return is set to TRUE, + * FALSE on failure, void in any other case */ public function database($params = '', $return = FALSE, $query_builder = NULL) { @@ -352,9 +352,9 @@ class CI_Loader { // -------------------------------------------------------------------- /** - * Load the Utilities Class + * Load the Database Utilities Class * - * @return string + * @return void */ public function dbutil() { @@ -381,7 +381,7 @@ class CI_Loader { /** * Load the Database Forge Class * - * @return string + * @return void */ public function dbforge() { @@ -402,19 +402,15 @@ class CI_Loader { // -------------------------------------------------------------------- /** - * Load View - * - * This function is used to load a "view" file. It has three parameters: + * View Loader * - * 1. The name of the "view" file to be included. - * 2. An associative array of data to be extracted for use in the view. - * 3. TRUE/FALSE - whether to return the data or load it. In - * some cases it's advantageous to be able to return data so that - * a developer can process it in some way. + * Loads "view" files. * - * @param string - * @param array - * @param bool + * @param string $view View name + * @param array $vars An associative array of data + * to be extracted for use in the view + * @param bool $return Whether to return the view output + * or leave it to the Output class * @return void */ public function view($view, $vars = array(), $return = FALSE) @@ -425,13 +421,11 @@ class CI_Loader { // -------------------------------------------------------------------- /** - * Load File - * - * This is a generic file loader + * Generic File Loader * - * @param string - * @param bool - * @return string + * @param string $path File path + * @param bool $return Whether to return the file output + * @return void|string */ public function file($path, $return = FALSE) { @@ -446,8 +440,10 @@ class CI_Loader { * Once variables are set they become available within * the controller class and its "view" files. * - * @param array - * @param string + * @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 $vars is a string * @return void */ public function vars($vars = array(), $val = '') @@ -475,8 +471,8 @@ class CI_Loader { * * Check if a variable is set and retrieve it. * - * @param array - * @return void + * @param string $key Variable name + * @return mixed The variable or NULL if not found */ public function get_var($key) { @@ -488,7 +484,7 @@ class CI_Loader { /** * Get Variables * - * Retrieve all loaded variables + * Retrieves all loaded variables. * * @return array */ @@ -500,11 +496,9 @@ class CI_Loader { // -------------------------------------------------------------------- /** - * Load Helper - * - * This function loads the specified helper file. + * Helper Loader * - * @param mixed + * @param string|string[] $helpers Helper name(s) * @return void */ public function helper($helpers = array()) @@ -562,10 +556,11 @@ class CI_Loader { /** * Load Helpers * - * This is simply an alias to the above function in case the - * user has written the plural form of this function. + * An alias for the helper() method in case the developer has + * written the plural form of it. * - * @param array + * @uses CI_Loader::helper() + * @param string|string[] $helpers Helper name(s) * @return void */ public function helpers($helpers = array()) @@ -576,22 +571,21 @@ class CI_Loader { // -------------------------------------------------------------------- /** - * Loads a language file + * Language Loader * - * @param array - * @param string + * Loads language files. + * + * @param string|string[] $files List of language file names to load + * @param string Language name * @return void */ - public function language($file = array(), $lang = '') + public function language($files = array(), $lang = '') { $CI =& get_instance(); - if ( ! is_array($file)) - { - $file = array($file); - } + is_array($files) OR $files = array($files); - foreach ($file as $langfile) + foreach ($files as $langfile) { $CI->lang->load($langfile, $lang); } @@ -600,30 +594,35 @@ class CI_Loader { // -------------------------------------------------------------------- /** - * Loads a config file + * Config Loader * - * @param string - * @param bool - * @param bool - * @return void + * 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) { $CI =& get_instance(); - $CI->config->load($file, $use_sections, $fail_gracefully); + return $CI->config->load($file, $use_sections, $fail_gracefully); } // -------------------------------------------------------------------- /** - * Driver + * Driver Loader * - * Loads a driver library + * Loads a driver library. * - * @param mixed the name of the class or array of classes - * @param mixed the optional parameters - * @param string an optional object name - * @return void + * @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 void|object|bool Object or FALSE on failure if $library is a string + * and $object_name is set. void otherwise. */ public function driver($library = '', $params = NULL, $object_name = NULL) { @@ -656,10 +655,16 @@ class CI_Loader { /** * Add Package Path * - * Prepends a parent path to the library, model, helper, and config path arrays + * Prepends a parent path to the library, model, helper and config + * path arrays. + * + * @see CI_Loader::$_ci_library_paths + * @see CI_Loader::$_ci_model_paths + * @see CI_Loader::$_ci_helper_paths + * @see CI_Config::$_config_paths * - * @param string - * @param bool + * @param string $path Path to add + * @param bool $view_cascade (default: TRUE) * @return void */ public function add_package_path($path, $view_cascade = TRUE) @@ -682,10 +687,10 @@ class CI_Loader { /** * Get Package Paths * - * Return a list of all package paths, by default it will ignore BASEPATH. + * Return a list of all package paths. * - * @param string - * @return void + * @param bool $include_base Whether to include BASEPATH (default: TRUE) + * @return array */ public function get_package_paths($include_base = FALSE) { @@ -697,14 +702,14 @@ class CI_Loader { /** * Remove Package Path * - * Remove a path from the library, model, and helper path arrays if it exists - * If no path is provided, the most recently added path is removed. + * 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 - * @param bool + * @param string $path Path to remove * @return void */ - public function remove_package_path($path = '', $remove_config_path = TRUE) + public function remove_package_path($path = '') { $config =& $this->_ci_get_component('config'); @@ -749,13 +754,16 @@ class CI_Loader { // -------------------------------------------------------------------- /** - * Loader + * Internal CI Data Loader + * + * Used to load views and files. * - * This function is used to load views and files. * Variables are prefixed with _ci_ to avoid symbol collision with - * variables made available to view files + * variables made available to view files. * - * @param array + * @used-by CI_Loader::view() + * @used-by CI_Loader::file() + * @param array $_ci_data Data to load * @return void */ protected function _ci_load($_ci_data) @@ -883,13 +891,14 @@ class CI_Loader { // -------------------------------------------------------------------- /** - * Load class + * Internal CI Class Loader * - * This function loads the requested class. + * @used-by CI_Loader::library() + * @uses CI_Loader::_ci_init_class() * - * @param string the item that is being loaded - * @param mixed any additional parameters - * @param string an optional object name + * @param string $class Class name to load + * @param mixed $params Optional parameters to pass to the class constructor + * @param string $object_name Optional object name to assign to * @return void */ protected function _ci_load_class($class, $params = NULL, $object_name = NULL) @@ -1024,12 +1033,17 @@ class CI_Loader { // -------------------------------------------------------------------- /** - * Instantiates a class + * Internal CI Class Instantiator + * + * @used-by CI_Loader::_ci_load_class() * - * @param string - * @param string - * @param bool - * @param string an optional object name + * @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 $object_name Optional object name to assign to * @return void */ protected function _ci_init_class($class, $prefix = '', $config = FALSE, $object_name = NULL) @@ -1131,11 +1145,11 @@ class CI_Loader { // -------------------------------------------------------------------- /** - * Autoloader + * CI Autoloader * - * The config/autoload.php file contains an array that permits sub-systems, - * libraries, and helpers to be loaded automatically. + * Loads component listed in the config/autoload.php file. * + * @used-by CI_Loader::initialize() * @return void */ protected function _ci_autoloader() @@ -1218,11 +1232,12 @@ class CI_Loader { // -------------------------------------------------------------------- /** - * Object to Array + * CI Object to Array translator * - * Takes an object as input and converts the class variables to array key/vals + * Takes an object as input and converts the class variables to + * an associative array with key/value pairs. * - * @param object + * @param object $object Object data to translate * @return array */ protected function _ci_object_to_array($object) @@ -1233,9 +1248,11 @@ class CI_Loader { // -------------------------------------------------------------------- /** - * Get a reference to a specific library or model + * CI Component getter + * + * Get a reference to a specific library or model. * - * @param string + * @param string $component Component name * @return bool */ protected function &_ci_get_component($component) @@ -1249,10 +1266,11 @@ class CI_Loader { /** * Prep filename * - * This function preps the name of various items to make loading them more reliable. + * This function prepares filenames of various items to + * make their loading more reliable. * - * @param mixed - * @param string + * @param string|string[] $filename Filename(s) + * @param string $extension Filename extension * @return array */ protected function _ci_prep_filename($filename, $extension) |