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google_forms/system/core/Loader.php

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Google_Forms
2024-07-10 12:37:36 +00:00
<?php
Your commit message
2024-08-09 12:04:48 +00:00
Google_Forms
2024-07-10 12:37:36 +00:00
/**
* CodeIgniter
*
* An open source application development framework for PHP
*
* This content is released under the MIT License (MIT)
*
* Copyright (c) 2019 - 2022, CodeIgniter Foundation
*
* Permission is hereby granted, free of charge, to any person obtaining a copy
* of this software and associated documentation files (the "Software"), to deal
* in the Software without restriction, including without limitation the rights
* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
* copies of the Software, and to permit persons to whom the Software is
* furnished to do so, subject to the following conditions:
*
* The above copyright notice and this permission notice shall be included in
* all copies or substantial portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
* THE SOFTWARE.
*
Your commit message
2024-08-09 12:04:48 +00:00
* @package CodeIgniter
* @author EllisLab Dev Team
* @copyright Copyright (c) 2008 - 2014, EllisLab, Inc. (https://ellislab.com/)
* @copyright Copyright (c) 2014 - 2019, British Columbia Institute of Technology (https://bcit.ca/)
* @copyright Copyright (c) 2019 - 2022, CodeIgniter Foundation (https://codeigniter.com/)
* @license https://opensource.org/licenses/MIT MIT License
* @link https://codeigniter.com
* @since Version 1.0.0
Google_Forms
2024-07-10 12:37:36 +00:00
* @filesource
*/
Your commit message
2024-08-09 12:04:48 +00:00
defined('BASEPATH') or exit('No direct script access allowed');
Google_Forms
2024-07-10 12:37:36 +00:00
/**
* Loader Class
*
* Loads framework components.
*
Your commit message
2024-08-09 12:04:48 +00:00
* @package CodeIgniter
* @subpackage Libraries
* @category Loader
* @author EllisLab Dev Team
* @link https://codeigniter.com/userguide3/libraries/loader.html
Google_Forms
2024-07-10 12:37:36 +00:00
*/
Your commit message
2024-08-09 12:04:48 +00:00
class CI_Loader
{
// All these are set automatically. Don't mess with them.
/**
* Nesting level of the output buffering mechanism
*
* @var int
*/
protected $_ci_ob_level;
/**
* List of paths to load views from
*
* @var array
*/
protected $_ci_view_paths = array(VIEWPATH => true);
/**
* 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('<?=', '<?php echo ', file_get_contents($_ci_path))));
} else {
include($_ci_path); // include() vs include_once() allows for multiple views with the same name
}
log_message('info', 'File loaded: ' . $_ci_path);
// Return the file data if requested
if ($_ci_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 {
$_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;
}
Google_Forms
2024-07-10 12:37:36 +00:00
}