1416 lines
36 KiB
PHP
1416 lines
36 KiB
PHP
<?php
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/**
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* CodeIgniter
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*
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* An open source application development framework for PHP
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*
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* This content is released under the MIT License (MIT)
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*
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* Copyright (c) 2014 - 2019, British Columbia Institute of Technology
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*
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* Permission is hereby granted, free of charge, to any person obtaining a copy
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* of this software and associated documentation files (the "Software"), to deal
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* in the Software without restriction, including without limitation the rights
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* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
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* copies of the Software, and to permit persons to whom the Software is
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* furnished to do so, subject to the following conditions:
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*
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* The above copyright notice and this permission notice shall be included in
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* all copies or substantial portions of the Software.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
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* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
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* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
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* THE SOFTWARE.
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*
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* @package CodeIgniter
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* @author EllisLab Dev Team
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* @copyright Copyright (c) 2008 - 2014, EllisLab, Inc. (https://ellislab.com/)
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* @copyright Copyright (c) 2014 - 2019, British Columbia Institute of Technology (https://bcit.ca/)
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* @license https://opensource.org/licenses/MIT MIT License
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* @link https://codeigniter.com
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* @since Version 1.0.0
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* @filesource
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*/
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defined('BASEPATH') OR exit('No direct script access allowed');
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/**
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* Loader Class
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*
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* Loads framework components.
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*
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* @package CodeIgniter
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* @subpackage Libraries
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* @category Loader
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* @author EllisLab Dev Team
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* @link https://codeigniter.com/user_guide/libraries/loader.html
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*/
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class CI_Loader {
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// All these are set automatically. Don't mess with them.
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/**
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* Nesting level of the output buffering mechanism
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*
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* @var int
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*/
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protected $_ci_ob_level;
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/**
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* List of paths to load views from
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*
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* @var array
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*/
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protected $_ci_view_paths = array(VIEWPATH => TRUE);
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/**
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* List of paths to load libraries from
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*
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* @var array
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*/
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protected $_ci_library_paths = array(APPPATH, BASEPATH);
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/**
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* List of paths to load models from
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*
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* @var array
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*/
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protected $_ci_model_paths = array(APPPATH);
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/**
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* List of paths to load helpers from
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*
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* @var array
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*/
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protected $_ci_helper_paths = array(APPPATH, BASEPATH);
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/**
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* List of cached variables
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*
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* @var array
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*/
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protected $_ci_cached_vars = array();
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/**
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* List of loaded classes
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*
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* @var array
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*/
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protected $_ci_classes = array();
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/**
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* List of loaded models
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*
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* @var array
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*/
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protected $_ci_models = array();
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/**
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* List of loaded helpers
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*
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* @var array
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*/
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protected $_ci_helpers = array();
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/**
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* List of class name mappings
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*
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* @var array
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*/
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protected $_ci_varmap = array(
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'unit_test' => 'unit',
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'user_agent' => 'agent'
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);
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// --------------------------------------------------------------------
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/**
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* Class constructor
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*
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* Sets component load paths, gets the initial output buffering level.
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*
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* @return void
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*/
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public function __construct()
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{
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$this->_ci_ob_level = ob_get_level();
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$this->_ci_classes =& is_loaded();
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log_message('info', 'Loader Class Initialized');
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}
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// --------------------------------------------------------------------
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/**
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* Initializer
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*
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* @todo Figure out a way to move this to the constructor
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* without breaking *package_path*() methods.
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* @uses CI_Loader::_ci_autoloader()
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* @used-by CI_Controller::__construct()
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* @return void
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*/
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public function initialize()
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{
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$this->_ci_autoloader();
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}
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// --------------------------------------------------------------------
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/**
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* Is Loaded
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*
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* A utility method to test if a class is in the self::$_ci_classes array.
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*
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* @used-by Mainly used by Form Helper function _get_validation_object().
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*
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* @param string $class Class name to check for
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* @return string|bool Class object name if loaded or FALSE
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*/
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public function is_loaded($class)
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{
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return array_search(ucfirst($class), $this->_ci_classes, TRUE);
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}
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// --------------------------------------------------------------------
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/**
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* Library Loader
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*
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* Loads and instantiates libraries.
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* Designed to be called from application controllers.
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*
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* @param mixed $library Library name
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* @param array $params Optional parameters to pass to the library class constructor
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* @param string $object_name An optional object name to assign to
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* @return object
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*/
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public function library($library, $params = NULL, $object_name = NULL)
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{
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if (empty($library))
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{
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return $this;
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}
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elseif (is_array($library))
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{
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foreach ($library as $key => $value)
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{
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if (is_int($key))
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{
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$this->library($value, $params);
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}
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else
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{
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$this->library($key, $params, $value);
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}
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}
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return $this;
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}
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if ($params !== NULL && ! is_array($params))
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{
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$params = NULL;
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}
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$this->_ci_load_library($library, $params, $object_name);
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return $this;
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}
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// --------------------------------------------------------------------
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/**
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* Model Loader
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*
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* Loads and instantiates models.
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*
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* @param mixed $model Model name
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* @param string $name An optional object name to assign to
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* @param bool $db_conn An optional database connection configuration to initialize
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* @return object
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*/
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public function model($model, $name = '', $db_conn = FALSE)
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{
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if (empty($model))
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{
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return $this;
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}
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elseif (is_array($model))
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{
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foreach ($model as $key => $value)
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{
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is_int($key) ? $this->model($value, '', $db_conn) : $this->model($key, $value, $db_conn);
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}
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return $this;
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}
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$path = '';
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// Is the model in a sub-folder? If so, parse out the filename and path.
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if (($last_slash = strrpos($model, '/')) !== FALSE)
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{
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// The path is in front of the last slash
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$path = substr($model, 0, ++$last_slash);
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// And the model name behind it
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$model = substr($model, $last_slash);
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}
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if (empty($name))
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{
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$name = $model;
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}
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if (in_array($name, $this->_ci_models, TRUE))
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{
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return $this;
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}
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$CI =& get_instance();
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if (isset($CI->$name))
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{
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throw new RuntimeException('The model name you are loading is the name of a resource that is already being used: '.$name);
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}
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if ($db_conn !== FALSE && ! class_exists('CI_DB', FALSE))
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{
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if ($db_conn === TRUE)
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{
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$db_conn = '';
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}
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$this->database($db_conn, FALSE, TRUE);
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}
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// Note: All of the code under this condition used to be just:
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//
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// load_class('Model', 'core');
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//
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// However, load_class() instantiates classes
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// to cache them for later use and that prevents
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// MY_Model from being an abstract class and is
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// sub-optimal otherwise anyway.
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if ( ! class_exists('CI_Model', FALSE))
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{
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$app_path = APPPATH.'core'.DIRECTORY_SEPARATOR;
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if (file_exists($app_path.'Model.php'))
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{
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require_once($app_path.'Model.php');
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if ( ! class_exists('CI_Model', FALSE))
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{
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throw new RuntimeException($app_path."Model.php exists, but doesn't declare class CI_Model");
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}
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log_message('info', 'CI_Model class loaded');
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}
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elseif ( ! class_exists('CI_Model', FALSE))
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{
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require_once(BASEPATH.'core'.DIRECTORY_SEPARATOR.'Model.php');
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}
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$class = config_item('subclass_prefix').'Model';
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if (file_exists($app_path.$class.'.php'))
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{
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require_once($app_path.$class.'.php');
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if ( ! class_exists($class, FALSE))
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{
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throw new RuntimeException($app_path.$class.".php exists, but doesn't declare class ".$class);
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}
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log_message('info', config_item('subclass_prefix').'Model class loaded');
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}
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}
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$model = ucfirst($model);
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if ( ! class_exists($model, FALSE))
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{
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foreach ($this->_ci_model_paths as $mod_path)
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{
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if ( ! file_exists($mod_path.'models/'.$path.$model.'.php'))
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{
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continue;
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}
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require_once($mod_path.'models/'.$path.$model.'.php');
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if ( ! class_exists($model, FALSE))
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{
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throw new RuntimeException($mod_path."models/".$path.$model.".php exists, but doesn't declare class ".$model);
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}
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break;
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}
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if ( ! class_exists($model, FALSE))
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{
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throw new RuntimeException('Unable to locate the model you have specified: '.$model);
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}
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}
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elseif ( ! is_subclass_of($model, 'CI_Model'))
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{
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throw new RuntimeException("Class ".$model." already exists and doesn't extend CI_Model");
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}
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$this->_ci_models[] = $name;
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$model = new $model();
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$CI->$name = $model;
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log_message('info', 'Model "'.get_class($model).'" initialized');
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return $this;
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}
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// --------------------------------------------------------------------
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/**
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* Database Loader
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*
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* @param mixed $params Database configuration options
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* @param bool $return Whether to return the database object
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* @param bool $query_builder Whether to enable Query Builder
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* (overrides the configuration setting)
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*
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* @return object|bool Database object if $return is set to TRUE,
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* FALSE on failure, CI_Loader instance in any other case
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*/
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public function database($params = '', $return = FALSE, $query_builder = NULL)
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{
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// Grab the super object
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$CI =& get_instance();
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// Do we even need to load the database class?
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if ($return === FALSE && $query_builder === NULL && isset($CI->db) && is_object($CI->db) && ! empty($CI->db->conn_id))
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{
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return FALSE;
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}
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require_once(BASEPATH.'database/DB.php');
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if ($return === TRUE)
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{
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return DB($params, $query_builder);
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}
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// Initialize the db variable. Needed to prevent
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// reference errors with some configurations
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$CI->db = '';
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// Load the DB class
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$CI->db =& DB($params, $query_builder);
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return $this;
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}
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// --------------------------------------------------------------------
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/**
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* Load the Database Utilities Class
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*
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* @param object $db Database object
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* @param bool $return Whether to return the DB Utilities class object or not
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* @return object
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*/
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public function dbutil($db = NULL, $return = FALSE)
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{
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$CI =& get_instance();
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if ( ! is_object($db) OR ! ($db instanceof CI_DB))
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{
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class_exists('CI_DB', FALSE) OR $this->database();
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$db =& $CI->db;
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}
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require_once(BASEPATH.'database/DB_utility.php');
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require_once(BASEPATH.'database/drivers/'.$db->dbdriver.'/'.$db->dbdriver.'_utility.php');
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$class = 'CI_DB_'.$db->dbdriver.'_utility';
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if ($return === TRUE)
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{
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return new $class($db);
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}
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$CI->dbutil = new $class($db);
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return $this;
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}
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// --------------------------------------------------------------------
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/**
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* Load the Database Forge Class
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*
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* @param object $db Database object
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* @param bool $return Whether to return the DB Forge class object or not
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* @return object
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*/
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public function dbforge($db = NULL, $return = FALSE)
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{
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$CI =& get_instance();
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if ( ! is_object($db) OR ! ($db instanceof CI_DB))
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{
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class_exists('CI_DB', FALSE) OR $this->database();
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$db =& $CI->db;
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}
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require_once(BASEPATH.'database/DB_forge.php');
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require_once(BASEPATH.'database/drivers/'.$db->dbdriver.'/'.$db->dbdriver.'_forge.php');
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if ( ! empty($db->subdriver))
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{
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$driver_path = BASEPATH.'database/drivers/'.$db->dbdriver.'/subdrivers/'.$db->dbdriver.'_'.$db->subdriver.'_forge.php';
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if (file_exists($driver_path))
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{
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require_once($driver_path);
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$class = 'CI_DB_'.$db->dbdriver.'_'.$db->subdriver.'_forge';
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}
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}
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else
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{
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$class = 'CI_DB_'.$db->dbdriver.'_forge';
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}
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if ($return === TRUE)
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{
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return new $class($db);
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}
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$CI->dbforge = new $class($db);
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return $this;
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}
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// --------------------------------------------------------------------
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/**
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* View Loader
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*
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* Loads "view" files.
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*
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* @param string $view View name
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* @param array $vars An associative array of data
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* to be extracted for use in the view
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* @param bool $return Whether to return the view output
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* or leave it to the Output class
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* @return object|string
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*/
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public function view($view, $vars = array(), $return = FALSE)
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{
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return $this->_ci_load(array('_ci_view' => $view, '_ci_vars' => $this->_ci_prepare_view_vars($vars), '_ci_return' => $return));
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}
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// --------------------------------------------------------------------
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/**
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* Generic File Loader
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*
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* @param string $path File path
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* @param bool $return Whether to return the file output
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* @return object|string
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*/
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public function file($path, $return = FALSE)
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{
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return $this->_ci_load(array('_ci_path' => $path, '_ci_return' => $return));
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}
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// --------------------------------------------------------------------
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/**
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* Set Variables
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*
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* Once variables are set they become available within
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* the controller class and its "view" files.
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*
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* @param array|object|string $vars
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* An associative array or object containing values
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* to be set, or a value's name if string
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* @param string $val Value to set, only used if $vars is a string
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* @return object
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*/
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public function vars($vars, $val = '')
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{
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$vars = is_string($vars)
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? array($vars => $val)
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: $this->_ci_prepare_view_vars($vars);
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foreach ($vars as $key => $val)
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{
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$this->_ci_cached_vars[$key] = $val;
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}
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return $this;
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}
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// --------------------------------------------------------------------
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/**
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* Clear Cached Variables
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*
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* Clears the cached variables.
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*
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* @return CI_Loader
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*/
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public function clear_vars()
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{
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$this->_ci_cached_vars = array();
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return $this;
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}
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// --------------------------------------------------------------------
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/**
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* Get Variable
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*
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* Check if a variable is set and retrieve it.
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*
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* @param string $key Variable name
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* @return mixed The variable or NULL if not found
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*/
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public function get_var($key)
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{
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return isset($this->_ci_cached_vars[$key]) ? $this->_ci_cached_vars[$key] : NULL;
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}
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// --------------------------------------------------------------------
|
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/**
|
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* Get Variables
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*
|
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* Retrieves all loaded variables.
|
|
*
|
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* @return array
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*/
|
|
public function get_vars()
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{
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return $this->_ci_cached_vars;
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}
|
|
|
|
// --------------------------------------------------------------------
|
|
|
|
/**
|
|
* 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;
|
|
}
|
|
}
|