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authorDerek Allard <derek.allard@ellislab.com>2007-12-20 15:00:50 +0100
committerDerek Allard <derek.allard@ellislab.com>2007-12-20 15:00:50 +0100
commit026585710c5ad4c5a8e5544d177b6a870f56123e (patch)
tree7225754da9ce9697a815e3f22fbe1ab6b4542d06 /system/libraries/Loader.php
parent15ddc9d0c1971de92c0f80bfe12f157786f97895 (diff)
removed an unneeded setting of $config to NULL
Diffstat (limited to 'system/libraries/Loader.php')
-rw-r--r--system/libraries/Loader.php986
1 files changed, 985 insertions, 1 deletions
diff --git a/system/libraries/Loader.php b/system/libraries/Loader.php
index 6e4c594e4..2de2bd7f2 100644
--- a/system/libraries/Loader.php
+++ b/system/libraries/Loader.php
@@ -1 +1,985 @@
-<?php if (!defined('BASEPATH')) exit('No direct script access allowed'); /** * CodeIgniter * * An open source application development framework for PHP 4.3.2 or newer * * @package CodeIgniter * @author Rick Ellis * @copyright Copyright (c) 2006, EllisLab, Inc. * @license http://www.codeigniter.com/user_guide/license.html * @link http://www.codeigniter.com * @since Version 1.0 * @filesource */ // ------------------------------------------------------------------------ /** * Loader Class * * Loads views and files * * @package CodeIgniter * @subpackage Libraries * @author Rick Ellis * @category Loader * @link http://www.codeigniter.com/user_guide/libraries/loader.html */ class CI_Loader { // All these are set automatically. Don't mess with them. var $_ci_ob_level; var $_ci_view_path = ''; var $_ci_is_php5 = FALSE; var $_ci_is_instance = FALSE; // Whether we should use $this or $CI =& get_instance() var $_ci_cached_vars = array(); var $_ci_classes = array(); var $_ci_models = array(); var $_ci_helpers = array(); var $_ci_plugins = array(); var $_ci_scripts = array(); var $_ci_varmap = array('unit_test' => 'unit', 'user_agent' => 'agent'); /** * Constructor * * Sets the path to the view files and gets the initial output buffering level * * @access public */ function CI_Loader() { $this->_ci_is_php5 = (floor(phpversion()) >= 5) ? TRUE : FALSE; $this->_ci_view_path = APPPATH.'views/'; $this->_ci_ob_level = ob_get_level(); log_message('debug', "Loader Class Initialized"); } // -------------------------------------------------------------------- /** * Class Loader * * This function lets users load and instantiate classes. * It is designed to be called from a user's app controllers. * * @access public * @param string the name of the class * @param mixed the optional parameters * @return void */ function library($library = '', $params = NULL) { if ($library == '') { return FALSE; } if (is_array($library)) { foreach ($library as $class) { $this->_ci_load_class($class, $params); } } else { $this->_ci_load_class($library, $params); } $this->_ci_assign_to_models(); } // -------------------------------------------------------------------- /** * Model Loader * * This function lets users load and instantiate models. * * @access public * @param string the name of the class * @param mixed any initialization parameters * @return void */ function model($model, $name = '', $db_conn = FALSE) { if (is_array($model)) { foreach($model as $babe) { $this->model($babe); } return; } if ($model == '') { return; } // Is the model in a sub-folder? If so, parse out the filename and path. if (strpos($model, '/') === FALSE) { $path = ''; } else { $x = explode('/', $model); $model = end($x); unset($x[count($x)-1]); $path = implode('/', $x).'/'; } if ($name == '') { $name = $model; } if (in_array($name, $this->_ci_models, TRUE)) { return; } $CI =& get_instance(); if (isset($CI->$name)) { show_error('The model name you are loading is the name of a resource that is already being used: '.$name); } $model = strtolower($model); if ( ! file_exists(APPPATH.'models/'.$path.$model.EXT)) { show_error('Unable to locate the model you have specified: '.$model); } if ($db_conn !== FALSE AND ! class_exists('CI_DB')) { if ($db_conn === TRUE) $db_conn = ''; $CI->load->database($db_conn, FALSE, TRUE); } if ( ! class_exists('Model')) { require_once(BASEPATH.'libraries/Model'.EXT); } require_once(APPPATH.'models/'.$path.$model.EXT); $model = ucfirst($model); $CI->$name = new $model(); $CI->$name->_assign_libraries(); $this->_ci_models[] = $name; } // -------------------------------------------------------------------- /** * Database Loader * * @access public * @param string the DB credentials * @param bool whether to return the DB object * @param bool whether to enable active record (this allows us to override the config setting) * @return object */ function database($params = '', $return = FALSE, $active_record = FALSE) { // Do we even need to load the database class? if (class_exists('CI_DB') AND $return == FALSE AND $active_record == FALSE) { return FALSE; } require_once(BASEPATH.'database/DB'.EXT); if ($return === TRUE) { return DB($params, $active_record); } // Grab the super object $CI =& get_instance(); // Initialize the db variable. Needed to prevent // reference errors with some configurations $CI->db = ''; // Load the DB class $CI->db =& DB($params, $active_record); // Assign the DB object to any existing models $this->_ci_assign_to_models(); } // -------------------------------------------------------------------- /** * Load the Utilities Class * * @access public * @return string */ function dbutil() { if ( ! class_exists('CI_DB')) { $this->database(); } $CI =& get_instance(); require_once(BASEPATH.'database/DB_utility'.EXT); require_once(BASEPATH.'database/drivers/'.$CI->db->dbdriver.'/'.$CI->db->dbdriver.'_utility'.EXT); $class = 'CI_DB_'.$CI->db->dbdriver.'_utility'; $CI->dbutil = new $class(); $CI->load->_ci_assign_to_models(); } // -------------------------------------------------------------------- /** * Load View * * This function is used to load a "view" file. It has three parameters: * * 1. The name of the "view" file to be included. * 2. An associative array of data to be extracted for use in the view. * 3. TRUE/FALSE - whether to return the data or load it. In * some cases it's advantageous to be able to return data so that * a developer can process it in some way. * * @access public * @param string * @param array * @param bool * @return void */ function view($view, $vars = array(), $return = FALSE) { return $this->_ci_load(array('view' => $view, 'vars' => $this->_ci_object_to_array($vars), 'return' => $return)); } // -------------------------------------------------------------------- /** * Load File * * This is a generic file loader * * @access public * @param string * @param bool * @return string */ function file($path, $return = FALSE) { return $this->_ci_load(array('path' => $path, 'return' => $return)); } // -------------------------------------------------------------------- /** * Set Variables * * Once variables are set they become available within * the controller class and its "view" files. * * @access public * @param array * @return void */ function vars($vars = array()) { $vars = $this->_ci_object_to_array($vars); if (is_array($vars) AND count($vars) > 0) { foreach ($vars as $key => $val) { $this->_ci_cached_vars[$key] = $val; } } } // -------------------------------------------------------------------- /** * Load Helper * * This function loads the specified helper file. * * @access public * @param mixed * @return void */ function helper($helpers = array()) { if ( ! is_array($helpers)) { $helpers = array($helpers); } foreach ($helpers as $helper) { $helper = strtolower(str_replace(EXT, '', str_replace('_helper', '', $helper)).'_helper'); if (isset($this->_ci_helpers[$helper])) { continue; } if (file_exists(APPPATH.'helpers/'.$helper.EXT)) { include_once(APPPATH.'helpers/'.$helper.EXT); } else { if (file_exists(BASEPATH.'helpers/'.$helper.EXT)) { include(BASEPATH.'helpers/'.$helper.EXT); } else { show_error('Unable to load the requested file: helpers/'.$helper.EXT); } } $this->_ci_helpers[$helper] = TRUE; } log_message('debug', 'Helpers loaded: '.implode(', ', $helpers)); } // -------------------------------------------------------------------- /** * Load Helpers * * This is simply an alias to the above function in case the * user has written the plural form of this function. * * @access public * @param array * @return void */ function helpers($helpers = array()) { $this->helper($helpers); } // -------------------------------------------------------------------- /** * Load Plugin * * This function loads the specified plugin. * * @access public * @param array * @return void */ function plugin($plugins = array()) { if ( ! is_array($plugins)) { $plugins = array($plugins); } foreach ($plugins as $plugin) { $plugin = strtolower(str_replace(EXT, '', str_replace('_plugin.', '', $plugin)).'_pi'); if (isset($this->_ci_plugins[$plugin])) { continue; } if (file_exists(APPPATH.'plugins/'.$plugin.EXT)) { include(APPPATH.'plugins/'.$plugin.EXT); } else { if (file_exists(BASEPATH.'plugins/'.$plugin.EXT)) { include(BASEPATH.'plugins/'.$plugin.EXT); } else { show_error('Unable to load the requested file: plugins/'.$plugin.EXT); } } $this->_ci_plugins[$plugin] = TRUE; } log_message('debug', 'Plugins loaded: '.implode(', ', $plugins)); } // -------------------------------------------------------------------- /** * Load Plugins * * This is simply an alias to the above function in case the * user has written the plural form of this function. * * @access public * @param array * @return void */ function plugins($plugins = array()) { $this->plugin($plugins); } // -------------------------------------------------------------------- /** * Load Script * * This function loads the specified include file from the * application/scripts/ folder. * * NOTE: This feature has been deprecated but it will remain available * for legacy users. * * @access public * @param array * @return void */ function script($scripts = array()) { if ( ! is_array($scripts)) { $scripts = array($scripts); } foreach ($scripts as $script) { $script = strtolower(str_replace(EXT, '', $script)); if (isset($this->_ci_scripts[$script])) { continue; } if ( ! file_exists(APPPATH.'scripts/'.$script.EXT)) { show_error('Unable to load the requested script: scripts/'.$script.EXT); } include(APPPATH.'scripts/'.$script.EXT); } log_message('debug', 'Scripts loaded: '.implode(', ', $scripts)); } // -------------------------------------------------------------------- /** * Loads a language file * * @access public * @param array * @param string * @return void */ function language($file = array(), $lang = '') { $CI =& get_instance(); if ( ! is_array($file)) { $file = array($file); } foreach ($file as $langfile) { $CI->lang->load($langfile, $lang); } } /** * Loads language files for scaffolding * * @access public * @param string * @return arra */ function scaffold_language($file = '', $lang = '', $return = FALSE) { $CI =& get_instance(); return $CI->lang->load($file, $lang, $return); } // -------------------------------------------------------------------- /** * Loads a config file * * @access public * @param string * @return void */ function config($file = '', $use_sections = FALSE, $fail_gracefully = FALSE) { $CI =& get_instance(); $CI->config->load($file, $use_sections, $fail_gracefully); } // -------------------------------------------------------------------- /** * Scaffolding Loader * * This initializing function works a bit different than the * others. It doesn't load the class. Instead, it simply * sets a flag indicating that scaffolding is allowed to be * used. The actual scaffolding function below is * called by the front controller based on whether the * second segment of the URL matches the "secret" scaffolding * word stored in the application/config/routes.php * * @access public * @param string * @return void */ function scaffolding($table = '') { if ($table === FALSE) { show_error('You must include the name of the table you would like to access when you initialize scaffolding'); } $CI =& get_instance(); $CI->_ci_scaffolding = TRUE; $CI->_ci_scaff_table = $table; } // -------------------------------------------------------------------- /** * Loader * * This function is used to load views and files. * * @access private * @param array * @return void */ function _ci_load($data) { // Set the default data variables foreach (array('view', 'vars', 'path', 'return') as $val) { $$val = ( ! isset($data[$val])) ? FALSE : $data[$val]; } // Set the path to the requested file if ($path == '') { $ext = pathinfo($view, PATHINFO_EXTENSION); $file = ($ext == '') ? $view.EXT : $view; $path = $this->_ci_view_path.$file; } else { $x = explode('/', $path); $file = end($x); } if ( ! file_exists($path)) { show_error('Unable to load the requested file: '.$file); } // This allows anything loaded using $this->load (views, files, etc.) // to become accessible from within the Controller and Model functions. // Only needed when running PHP 5 if ($this->_ci_is_instance()) { $CI =& get_instance(); foreach (get_object_vars($CI) as $key => $var) { if ( ! isset($this->$key)) { $this->$key =& $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. */ if (is_array($vars)) { $this->_ci_cached_vars = array_merge($this->_ci_cached_vars, $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 ((bool) @ini_get('short_open_tag') === FALSE AND config_item('rewrite_short_tags') == TRUE) { echo eval('?>'.preg_replace("/;*\s*\?>/", "; ?>", str_replace('<?=', '<?php echo ', file_get_contents($path))).'<?php '); } else { include($path); } log_message('debug', 'File loaded: '.$path); // Return the file data if requested if ($return === TRUE) { $buffer = ob_get_contents(); @ob_end_clean(); return $buffer; } /* * Flush the buffer... or buff the flusher? * * In order to permit views to be nested within * other views, we need to flush the content back out whenever * we are beyond the first level of output buffering so that * it can be seen and included properly by the first included * template and any subsequent ones. Oy! * */ if (ob_get_level() > $this->_ci_ob_level + 1) { ob_end_flush(); } else { // PHP 4 requires that we use a global global $OUT; $OUT->set_output(ob_get_contents()); @ob_end_clean(); } } // -------------------------------------------------------------------- /** * Load class * * This function loads the requested class. * * @access private * @param string the item that is being loaded * @param mixed any additional parameters * @return void */ function _ci_load_class($class, $params = NULL) { // Get the class name $class = str_replace(EXT, '', $class); // We'll test for both lowercase and capitalized versions of the file name foreach (array(ucfirst($class), strtolower($class)) as $class) { $subclass = APPPATH.'libraries/'.config_item('subclass_prefix').$class.EXT; // Is this a class extension request? if (file_exists($subclass)) { $baseclass = BASEPATH.'libraries/'.ucfirst($class).EXT; if ( ! file_exists($baseclass)) { log_message('error', "Unable to load the requested class: ".$class); show_error("Unable to load the requested class: ".$class); } // Safety: Was the class already loaded by a previous call? if (in_array($subclass, $this->_ci_classes)) { $is_duplicate = TRUE; log_message('debug', $class." class already loaded. Second attempt ignored."); return; } include($baseclass); include($subclass); $this->_ci_classes[] = $subclass; return $this->_ci_init_class($class, config_item('subclass_prefix'), $params); } // Lets search for the requested library file and load it. $is_duplicate = FALSE; for ($i = 1; $i < 3; $i++) { $path = ($i % 2) ? APPPATH : BASEPATH; $filepath = $path.'libraries/'.$class.EXT; // Does the file exist? No? Bummer... if ( ! file_exists($filepath)) { continue; } // Safety: Was the class already loaded by a previous call? if (in_array($filepath, $this->_ci_classes)) { $is_duplicate = TRUE; log_message('debug', $class." class already loaded. Second attempt ignored."); return; } include($filepath); $this->_ci_classes[] = $filepath; return $this->_ci_init_class($class, '', $params); } } // END FOREACH // If we got this far we were unable to find the requested class. // We do not issue errors if the load call failed due to a duplicate request if ($is_duplicate == FALSE) { log_message('error', "Unable to load the requested class: ".$class); show_error("Unable to load the requested class: ".$class); } } // -------------------------------------------------------------------- /** * Instantiates a class * * @access private * @param string * @param string * @return null */ function _ci_init_class($class, $prefix = '', $config = FALSE) { // Is there an associated config file for this class? if ($config === NULL) { $config = NULL; if (file_exists(APPPATH.'config/'.$class.EXT)) { include(APPPATH.'config/'.$class.EXT); } } if ($prefix == '') { $name = (class_exists('CI_'.$class)) ? 'CI_'.$class : $class; } else { $name = $prefix.$class; } // Set the variable name we will assign the class to $class = strtolower($class); $classvar = ( ! isset($this->_ci_varmap[$class])) ? $class : $this->_ci_varmap[$class]; // Instantiate the class $CI =& get_instance(); if ($config !== NULL) { $CI->$classvar = new $name($config); } else { $CI->$classvar = new $name; } } // -------------------------------------------------------------------- /** * Autoloader * * The config/autoload.php file contains an array that permits sub-systems, * libraries, plugins, and helpers to be loaded automatically. * * @access private * @param array * @return void */ function _ci_autoloader() { include(APPPATH.'config/autoload'.EXT); if ( ! isset($autoload)) { return FALSE; } // Load any custom config file if (count($autoload['config']) > 0) { $CI =& get_instance(); foreach ($autoload['config'] as $key => $val) { $CI->config->load($val); } } // Autoload plugins, helpers, scripts and languages foreach (array('helper', 'plugin', 'script', 'language') as $type) { if (isset($autoload[$type]) AND count($autoload[$type]) > 0) { $this->$type($autoload[$type]); } } // Autoload models if (isset($autoload['model'])) { $this->model($autoload['model']); } // A little tweak to remain backward compatible // The $autoload['core'] item was deprecated if ( ! isset($autoload['libraries'])) { $autoload['libraries'] = $autoload['core']; } // Load libraries if (isset($autoload['libraries']) AND 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 scaffolding if (in_array('scaffolding', $autoload['libraries'])) { $this->scaffolding(); $autoload['libraries'] = array_diff($autoload['libraries'], array('scaffolding')); } // Load all other libraries foreach ($autoload['libraries'] as $item) { $this->library($item); } // Load the model class. if (in_array('model', $autoload['libraries'])) { $this->model(); $autoload['libraries'] = array_diff($autoload['libraries'], array('model')); } } } // -------------------------------------------------------------------- /** * Assign to Models * * Makes sure that anything loaded by the loader class (libraries, plugins, etc.) * will be available to models, if any exist. * * @access private * @param object * @return array */ function _ci_assign_to_models() { if (count($this->_ci_models) == 0) { return; } if ($this->_ci_is_instance()) { $CI =& get_instance(); foreach ($this->_ci_models as $model) { $CI->$model->_assign_libraries(); } } else { foreach ($this->_ci_models as $model) { $this->$model->_assign_libraries(); } } } // -------------------------------------------------------------------- /** * Object to Array * * Takes an object as input and converts the class variables to array key/vals * * @access private * @param object * @return array */ function _ci_object_to_array($object) { return (is_object($object)) ? get_object_vars($object) : $object; } // -------------------------------------------------------------------- /** * Determines whether we should use the CI instance or $this * * @access private * @return bool */ function _ci_is_instance() { if ($this->_ci_is_php5 == TRUE) { return TRUE; } global $CI; return (is_object($CI)) ? TRUE : FALSE; } } ?> \ No newline at end of file
+<?php if (!defined('BASEPATH')) exit('No direct script access allowed');
+/**
+ * CodeIgniter
+ *
+ * An open source application development framework for PHP 4.3.2 or newer
+ *
+ * @package CodeIgniter
+ * @author Rick Ellis
+ * @copyright Copyright (c) 2006, EllisLab, Inc.
+ * @license http://www.codeigniter.com/user_guide/license.html
+ * @link http://www.codeigniter.com
+ * @since Version 1.0
+ * @filesource
+ */
+
+// ------------------------------------------------------------------------
+
+/**
+ * Loader Class
+ *
+ * Loads views and files
+ *
+ * @package CodeIgniter
+ * @subpackage Libraries
+ * @author Rick Ellis
+ * @category Loader
+ * @link http://www.codeigniter.com/user_guide/libraries/loader.html
+ */
+class CI_Loader {
+
+ // All these are set automatically. Don't mess with them.
+ var $_ci_ob_level;
+ var $_ci_view_path = '';
+ var $_ci_is_php5 = FALSE;
+ var $_ci_is_instance = FALSE; // Whether we should use $this or $CI =& get_instance()
+ var $_ci_cached_vars = array();
+ var $_ci_classes = array();
+ var $_ci_models = array();
+ var $_ci_helpers = array();
+ var $_ci_plugins = array();
+ var $_ci_scripts = array();
+ var $_ci_varmap = array('unit_test' => 'unit', 'user_agent' => 'agent');
+
+
+ /**
+ * Constructor
+ *
+ * Sets the path to the view files and gets the initial output buffering level
+ *
+ * @access public
+ */
+ function CI_Loader()
+ {
+ $this->_ci_is_php5 = (floor(phpversion()) >= 5) ? TRUE : FALSE;
+ $this->_ci_view_path = APPPATH.'views/';
+ $this->_ci_ob_level = ob_get_level();
+
+ log_message('debug', "Loader Class Initialized");
+ }
+
+ // --------------------------------------------------------------------
+
+ /**
+ * Class Loader
+ *
+ * This function lets users load and instantiate classes.
+ * It is designed to be called from a user's app controllers.
+ *
+ * @access public
+ * @param string the name of the class
+ * @param mixed the optional parameters
+ * @return void
+ */
+ function library($library = '', $params = NULL)
+ {
+ if ($library == '')
+ {
+ return FALSE;
+ }
+
+ if (is_array($library))
+ {
+ foreach ($library as $class)
+ {
+ $this->_ci_load_class($class, $params);
+ }
+ }
+ else
+ {
+ $this->_ci_load_class($library, $params);
+ }
+
+ $this->_ci_assign_to_models();
+ }
+
+ // --------------------------------------------------------------------
+
+ /**
+ * Model Loader
+ *
+ * This function lets users load and instantiate models.
+ *
+ * @access public
+ * @param string the name of the class
+ * @param mixed any initialization parameters
+ * @return void
+ */
+ function model($model, $name = '', $db_conn = FALSE)
+ {
+ if (is_array($model))
+ {
+ foreach($model as $babe)
+ {
+ $this->model($babe);
+ }
+ return;
+ }
+
+ if ($model == '')
+ {
+ return;
+ }
+
+ // Is the model in a sub-folder? If so, parse out the filename and path.
+ if (strpos($model, '/') === FALSE)
+ {
+ $path = '';
+ }
+ else
+ {
+ $x = explode('/', $model);
+ $model = end($x);
+ unset($x[count($x)-1]);
+ $path = implode('/', $x).'/';
+ }
+
+ if ($name == '')
+ {
+ $name = $model;
+ }
+
+ if (in_array($name, $this->_ci_models, TRUE))
+ {
+ return;
+ }
+
+ $CI =& get_instance();
+ if (isset($CI->$name))
+ {
+ show_error('The model name you are loading is the name of a resource that is already being used: '.$name);
+ }
+
+ $model = strtolower($model);
+
+ if ( ! file_exists(APPPATH.'models/'.$path.$model.EXT))
+ {
+ show_error('Unable to locate the model you have specified: '.$model);
+ }
+
+ if ($db_conn !== FALSE AND ! class_exists('CI_DB'))
+ {
+ if ($db_conn === TRUE)
+ $db_conn = '';
+
+ $CI->load->database($db_conn, FALSE, TRUE);
+ }
+
+ if ( ! class_exists('Model'))
+ {
+ require_once(BASEPATH.'libraries/Model'.EXT);
+ }
+
+ require_once(APPPATH.'models/'.$path.$model.EXT);
+
+ $model = ucfirst($model);
+
+ $CI->$name = new $model();
+ $CI->$name->_assign_libraries();
+
+ $this->_ci_models[] = $name;
+ }
+
+ // --------------------------------------------------------------------
+
+ /**
+ * Database Loader
+ *
+ * @access public
+ * @param string the DB credentials
+ * @param bool whether to return the DB object
+ * @param bool whether to enable active record (this allows us to override the config setting)
+ * @return object
+ */
+ function database($params = '', $return = FALSE, $active_record = FALSE)
+ {
+ // Do we even need to load the database class?
+ if (class_exists('CI_DB') AND $return == FALSE AND $active_record == FALSE)
+ {
+ return FALSE;
+ }
+
+ require_once(BASEPATH.'database/DB'.EXT);
+
+ if ($return === TRUE)
+ {
+ return DB($params, $active_record);
+ }
+
+ // Grab the super object
+ $CI =& get_instance();
+
+ // Initialize the db variable. Needed to prevent
+ // reference errors with some configurations
+ $CI->db = '';
+
+ // Load the DB class
+ $CI->db =& DB($params, $active_record);
+
+ // Assign the DB object to any existing models
+ $this->_ci_assign_to_models();
+ }
+
+ // --------------------------------------------------------------------
+
+ /**
+ * Load the Utilities Class
+ *
+ * @access public
+ * @return string
+ */
+ function dbutil()
+ {
+ if ( ! class_exists('CI_DB'))
+ {
+ $this->database();
+ }
+
+ $CI =& get_instance();
+
+ require_once(BASEPATH.'database/DB_utility'.EXT);
+ require_once(BASEPATH.'database/drivers/'.$CI->db->dbdriver.'/'.$CI->db->dbdriver.'_utility'.EXT);
+ $class = 'CI_DB_'.$CI->db->dbdriver.'_utility';
+
+ $CI->dbutil = new $class();
+ $CI->load->_ci_assign_to_models();
+ }
+
+ // --------------------------------------------------------------------
+
+ /**
+ * Load View
+ *
+ * This function is used to load a "view" file. It has three parameters:
+ *
+ * 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.
+ *
+ * @access public
+ * @param string
+ * @param array
+ * @param bool
+ * @return void
+ */
+ function view($view, $vars = array(), $return = FALSE)
+ {
+ return $this->_ci_load(array('view' => $view, 'vars' => $this->_ci_object_to_array($vars), 'return' => $return));
+ }
+
+ // --------------------------------------------------------------------
+
+ /**
+ * Load File
+ *
+ * This is a generic file loader
+ *
+ * @access public
+ * @param string
+ * @param bool
+ * @return string
+ */
+ function file($path, $return = FALSE)
+ {
+ return $this->_ci_load(array('path' => $path, 'return' => $return));
+ }
+
+ // --------------------------------------------------------------------
+
+ /**
+ * Set Variables
+ *
+ * Once variables are set they become available within
+ * the controller class and its "view" files.
+ *
+ * @access public
+ * @param array
+ * @return void
+ */
+ function vars($vars = array())
+ {
+ $vars = $this->_ci_object_to_array($vars);
+
+ if (is_array($vars) AND count($vars) > 0)
+ {
+ foreach ($vars as $key => $val)
+ {
+ $this->_ci_cached_vars[$key] = $val;
+ }
+ }
+ }
+
+ // --------------------------------------------------------------------
+
+ /**
+ * Load Helper
+ *
+ * This function loads the specified helper file.
+ *
+ * @access public
+ * @param mixed
+ * @return void
+ */
+ function helper($helpers = array())
+ {
+ if ( ! is_array($helpers))
+ {
+ $helpers = array($helpers);
+ }
+
+ foreach ($helpers as $helper)
+ {
+ $helper = strtolower(str_replace(EXT, '', str_replace('_helper', '', $helper)).'_helper');
+
+ if (isset($this->_ci_helpers[$helper]))
+ {
+ continue;
+ }
+
+ if (file_exists(APPPATH.'helpers/'.$helper.EXT))
+ {
+ include_once(APPPATH.'helpers/'.$helper.EXT);
+ }
+ else
+ {
+ if (file_exists(BASEPATH.'helpers/'.$helper.EXT))
+ {
+ include(BASEPATH.'helpers/'.$helper.EXT);
+ }
+ else
+ {
+ show_error('Unable to load the requested file: helpers/'.$helper.EXT);
+ }
+ }
+
+ $this->_ci_helpers[$helper] = TRUE;
+
+ }
+
+ log_message('debug', 'Helpers loaded: '.implode(', ', $helpers));
+ }
+
+ // --------------------------------------------------------------------
+
+ /**
+ * Load Helpers
+ *
+ * This is simply an alias to the above function in case the
+ * user has written the plural form of this function.
+ *
+ * @access public
+ * @param array
+ * @return void
+ */
+ function helpers($helpers = array())
+ {
+ $this->helper($helpers);
+ }
+
+ // --------------------------------------------------------------------
+
+ /**
+ * Load Plugin
+ *
+ * This function loads the specified plugin.
+ *
+ * @access public
+ * @param array
+ * @return void
+ */
+ function plugin($plugins = array())
+ {
+ if ( ! is_array($plugins))
+ {
+ $plugins = array($plugins);
+ }
+
+ foreach ($plugins as $plugin)
+ {
+ $plugin = strtolower(str_replace(EXT, '', str_replace('_plugin.', '', $plugin)).'_pi');
+
+ if (isset($this->_ci_plugins[$plugin]))
+ {
+ continue;
+ }
+
+ if (file_exists(APPPATH.'plugins/'.$plugin.EXT))
+ {
+ include(APPPATH.'plugins/'.$plugin.EXT);
+ }
+ else
+ {
+ if (file_exists(BASEPATH.'plugins/'.$plugin.EXT))
+ {
+ include(BASEPATH.'plugins/'.$plugin.EXT);
+ }
+ else
+ {
+ show_error('Unable to load the requested file: plugins/'.$plugin.EXT);
+ }
+ }
+
+ $this->_ci_plugins[$plugin] = TRUE;
+ }
+
+ log_message('debug', 'Plugins loaded: '.implode(', ', $plugins));
+ }
+
+ // --------------------------------------------------------------------
+
+ /**
+ * Load Plugins
+ *
+ * This is simply an alias to the above function in case the
+ * user has written the plural form of this function.
+ *
+ * @access public
+ * @param array
+ * @return void
+ */
+ function plugins($plugins = array())
+ {
+ $this->plugin($plugins);
+ }
+
+ // --------------------------------------------------------------------
+
+ /**
+ * Load Script
+ *
+ * This function loads the specified include file from the
+ * application/scripts/ folder.
+ *
+ * NOTE: This feature has been deprecated but it will remain available
+ * for legacy users.
+ *
+ * @access public
+ * @param array
+ * @return void
+ */
+ function script($scripts = array())
+ {
+ if ( ! is_array($scripts))
+ {
+ $scripts = array($scripts);
+ }
+
+ foreach ($scripts as $script)
+ {
+ $script = strtolower(str_replace(EXT, '', $script));
+
+ if (isset($this->_ci_scripts[$script]))
+ {
+ continue;
+ }
+
+ if ( ! file_exists(APPPATH.'scripts/'.$script.EXT))
+ {
+ show_error('Unable to load the requested script: scripts/'.$script.EXT);
+ }
+
+ include(APPPATH.'scripts/'.$script.EXT);
+ }
+
+ log_message('debug', 'Scripts loaded: '.implode(', ', $scripts));
+ }
+
+ // --------------------------------------------------------------------
+
+ /**
+ * Loads a language file
+ *
+ * @access public
+ * @param array
+ * @param string
+ * @return void
+ */
+ function language($file = array(), $lang = '')
+ {
+ $CI =& get_instance();
+
+ if ( ! is_array($file))
+ {
+ $file = array($file);
+ }
+
+ foreach ($file as $langfile)
+ {
+ $CI->lang->load($langfile, $lang);
+ }
+ }
+
+ /**
+ * Loads language files for scaffolding
+ *
+ * @access public
+ * @param string
+ * @return arra
+ */
+ function scaffold_language($file = '', $lang = '', $return = FALSE)
+ {
+ $CI =& get_instance();
+ return $CI->lang->load($file, $lang, $return);
+ }
+
+ // --------------------------------------------------------------------
+
+ /**
+ * Loads a config file
+ *
+ * @access public
+ * @param string
+ * @return void
+ */
+ function config($file = '', $use_sections = FALSE, $fail_gracefully = FALSE)
+ {
+ $CI =& get_instance();
+ $CI->config->load($file, $use_sections, $fail_gracefully);
+ }
+
+ // --------------------------------------------------------------------
+
+ /**
+ * Scaffolding Loader
+ *
+ * This initializing function works a bit different than the
+ * others. It doesn't load the class. Instead, it simply
+ * sets a flag indicating that scaffolding is allowed to be
+ * used. The actual scaffolding function below is
+ * called by the front controller based on whether the
+ * second segment of the URL matches the "secret" scaffolding
+ * word stored in the application/config/routes.php
+ *
+ * @access public
+ * @param string
+ * @return void
+ */
+ function scaffolding($table = '')
+ {
+ if ($table === FALSE)
+ {
+ show_error('You must include the name of the table you would like to access when you initialize scaffolding');
+ }
+
+ $CI =& get_instance();
+ $CI->_ci_scaffolding = TRUE;
+ $CI->_ci_scaff_table = $table;
+ }
+
+ // --------------------------------------------------------------------
+
+ /**
+ * Loader
+ *
+ * This function is used to load views and files.
+ *
+ * @access private
+ * @param array
+ * @return void
+ */
+ function _ci_load($data)
+ {
+ // Set the default data variables
+ foreach (array('view', 'vars', 'path', 'return') as $val)
+ {
+ $$val = ( ! isset($data[$val])) ? FALSE : $data[$val];
+ }
+
+ // Set the path to the requested file
+ if ($path == '')
+ {
+ $ext = pathinfo($view, PATHINFO_EXTENSION);
+ $file = ($ext == '') ? $view.EXT : $view;
+ $path = $this->_ci_view_path.$file;
+ }
+ else
+ {
+ $x = explode('/', $path);
+ $file = end($x);
+ }
+
+ if ( ! file_exists($path))
+ {
+ show_error('Unable to load the requested file: '.$file);
+ }
+
+ // This allows anything loaded using $this->load (views, files, etc.)
+ // to become accessible from within the Controller and Model functions.
+ // Only needed when running PHP 5
+
+ if ($this->_ci_is_instance())
+ {
+ $CI =& get_instance();
+ foreach (get_object_vars($CI) as $key => $var)
+ {
+ if ( ! isset($this->$key))
+ {
+ $this->$key =& $CI->$key;
+ }
+ }
+ }
+
+ /*
+ * Extract and cache variables
+ *
+ * You can either set variables using the dedicated $this->load_vars()
+ * function or via the second parameter of this function. We'll merge
+ * the two types and cache them so that views that are embedded within
+ * other views can have access to these variables.
+ */
+ if (is_array($vars))
+ {
+ $this->_ci_cached_vars = array_merge($this->_ci_cached_vars, $vars);
+ }
+ extract($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 ((bool) @ini_get('short_open_tag') === FALSE AND config_item('rewrite_short_tags') == TRUE)
+ {
+ echo eval('?>'.preg_replace("/;*\s*\?>/", "; ?>", str_replace('<?=', '<?php echo ', file_get_contents($path))).'<?php ');
+ }
+ else
+ {
+ include($path);
+ }
+
+ log_message('debug', 'File loaded: '.$path);
+
+ // Return the file data if requested
+ if ($return === TRUE)
+ {
+ $buffer = ob_get_contents();
+ @ob_end_clean();
+ return $buffer;
+ }
+
+ /*
+ * Flush the buffer... or buff the flusher?
+ *
+ * In order to permit views to be nested within
+ * other views, we need to flush the content back out whenever
+ * we are beyond the first level of output buffering so that
+ * it can be seen and included properly by the first included
+ * template and any subsequent ones. Oy!
+ *
+ */
+ if (ob_get_level() > $this->_ci_ob_level + 1)
+ {
+ ob_end_flush();
+ }
+ else
+ {
+ // PHP 4 requires that we use a global
+ global $OUT;
+ $OUT->set_output(ob_get_contents());
+ @ob_end_clean();
+ }
+ }
+
+ // --------------------------------------------------------------------
+
+ /**
+ * Load class
+ *
+ * This function loads the requested class.
+ *
+ * @access private
+ * @param string the item that is being loaded
+ * @param mixed any additional parameters
+ * @return void
+ */
+ function _ci_load_class($class, $params = NULL)
+ {
+ // Get the class name
+ $class = str_replace(EXT, '', $class);
+
+ // We'll test for both lowercase and capitalized versions of the file name
+ foreach (array(ucfirst($class), strtolower($class)) as $class)
+ {
+ $subclass = APPPATH.'libraries/'.config_item('subclass_prefix').$class.EXT;
+
+ // Is this a class extension request?
+ if (file_exists($subclass))
+ {
+ $baseclass = BASEPATH.'libraries/'.ucfirst($class).EXT;
+
+ if ( ! file_exists($baseclass))
+ {
+ log_message('error', "Unable to load the requested class: ".$class);
+ show_error("Unable to load the requested class: ".$class);
+ }
+
+ // Safety: Was the class already loaded by a previous call?
+ if (in_array($subclass, $this->_ci_classes))
+ {
+ $is_duplicate = TRUE;
+ log_message('debug', $class." class already loaded. Second attempt ignored.");
+ return;
+ }
+
+ include($baseclass);
+ include($subclass);
+ $this->_ci_classes[] = $subclass;
+
+ return $this->_ci_init_class($class, config_item('subclass_prefix'), $params);
+ }
+
+ // Lets search for the requested library file and load it.
+ $is_duplicate = FALSE;
+ for ($i = 1; $i < 3; $i++)
+ {
+ $path = ($i % 2) ? APPPATH : BASEPATH;
+ $filepath = $path.'libraries/'.$class.EXT;
+
+ // Does the file exist? No? Bummer...
+ if ( ! file_exists($filepath))
+ {
+ continue;
+ }
+
+ // Safety: Was the class already loaded by a previous call?
+ if (in_array($filepath, $this->_ci_classes))
+ {
+ $is_duplicate = TRUE;
+ log_message('debug', $class." class already loaded. Second attempt ignored.");
+ return;
+ }
+
+ include($filepath);
+ $this->_ci_classes[] = $filepath;
+ return $this->_ci_init_class($class, '', $params);
+ }
+ } // END FOREACH
+
+ // If we got this far we were unable to find the requested class.
+ // We do not issue errors if the load call failed due to a duplicate request
+ if ($is_duplicate == FALSE)
+ {
+ log_message('error', "Unable to load the requested class: ".$class);
+ show_error("Unable to load the requested class: ".$class);
+ }
+ }
+
+ // --------------------------------------------------------------------
+
+ /**
+ * Instantiates a class
+ *
+ * @access private
+ * @param string
+ * @param string
+ * @return null
+ */
+ function _ci_init_class($class, $prefix = '', $config = FALSE)
+ {
+ // Is there an associated config file for this class?
+ if ($config === NULL)
+ {
+ if (file_exists(APPPATH.'config/'.$class.EXT))
+ {
+ include(APPPATH.'config/'.$class.EXT);
+ }
+ }
+
+ if ($prefix == '')
+ {
+ $name = (class_exists('CI_'.$class)) ? 'CI_'.$class : $class;
+ }
+ else
+ {
+ $name = $prefix.$class;
+ }
+
+ // Set the variable name we will assign the class to
+ $class = strtolower($class);
+ $classvar = ( ! isset($this->_ci_varmap[$class])) ? $class : $this->_ci_varmap[$class];
+
+ // Instantiate the class
+ $CI =& get_instance();
+ if ($config !== NULL)
+ {
+ $CI->$classvar = new $name($config);
+ }
+ else
+ {
+ $CI->$classvar = new $name;
+ }
+ }
+
+ // --------------------------------------------------------------------
+
+ /**
+ * Autoloader
+ *
+ * The config/autoload.php file contains an array that permits sub-systems,
+ * libraries, plugins, and helpers to be loaded automatically.
+ *
+ * @access private
+ * @param array
+ * @return void
+ */
+ function _ci_autoloader()
+ {
+ include(APPPATH.'config/autoload'.EXT);
+
+ if ( ! isset($autoload))
+ {
+ return FALSE;
+ }
+
+ // Load any custom config file
+ if (count($autoload['config']) > 0)
+ {
+ $CI =& get_instance();
+ foreach ($autoload['config'] as $key => $val)
+ {
+ $CI->config->load($val);
+ }
+ }
+
+ // Autoload plugins, helpers, scripts and languages
+ foreach (array('helper', 'plugin', 'script', 'language') as $type)
+ {
+ if (isset($autoload[$type]) AND count($autoload[$type]) > 0)
+ {
+ $this->$type($autoload[$type]);
+ }
+ }
+
+ // Autoload models
+ if (isset($autoload['model']))
+ {
+ $this->model($autoload['model']);
+ }
+
+ // A little tweak to remain backward compatible
+ // The $autoload['core'] item was deprecated
+ if ( ! isset($autoload['libraries']))
+ {
+ $autoload['libraries'] = $autoload['core'];
+ }
+
+ // Load libraries
+ if (isset($autoload['libraries']) AND 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 scaffolding
+ if (in_array('scaffolding', $autoload['libraries']))
+ {
+ $this->scaffolding();
+ $autoload['libraries'] = array_diff($autoload['libraries'], array('scaffolding'));
+ }
+
+ // Load all other libraries
+ foreach ($autoload['libraries'] as $item)
+ {
+ $this->library($item);
+ }
+
+ // Load the model class.
+ if (in_array('model', $autoload['libraries']))
+ {
+ $this->model();
+ $autoload['libraries'] = array_diff($autoload['libraries'], array('model'));
+ }
+ }
+ }
+
+ // --------------------------------------------------------------------
+
+ /**
+ * Assign to Models
+ *
+ * Makes sure that anything loaded by the loader class (libraries, plugins, etc.)
+ * will be available to models, if any exist.
+ *
+ * @access private
+ * @param object
+ * @return array
+ */
+ function _ci_assign_to_models()
+ {
+ if (count($this->_ci_models) == 0)
+ {
+ return;
+ }
+
+ if ($this->_ci_is_instance())
+ {
+ $CI =& get_instance();
+ foreach ($this->_ci_models as $model)
+ {
+ $CI->$model->_assign_libraries();
+ }
+ }
+ else
+ {
+ foreach ($this->_ci_models as $model)
+ {
+ $this->$model->_assign_libraries();
+ }
+ }
+ }
+
+ // --------------------------------------------------------------------
+
+ /**
+ * Object to Array
+ *
+ * Takes an object as input and converts the class variables to array key/vals
+ *
+ * @access private
+ * @param object
+ * @return array
+ */
+ function _ci_object_to_array($object)
+ {
+ return (is_object($object)) ? get_object_vars($object) : $object;
+ }
+
+ // --------------------------------------------------------------------
+
+ /**
+ * Determines whether we should use the CI instance or $this
+ *
+ * @access private
+ * @return bool
+ */
+ function _ci_is_instance()
+ {
+ if ($this->_ci_is_php5 == TRUE)
+ {
+ return TRUE;
+ }
+
+ global $CI;
+ return (is_object($CI)) ? TRUE : FALSE;
+ }
+
+}
+?> \ No newline at end of file