Thread

class Test extends Controller 
{

    function Test()
    {
        parent::Controller();
    }
    
    function index() 
    {
        $this->load->model('category_model');
        $this->category_model->get(1);
    }
}

class Category_model extends Model 
{
    function Category_model() 
    {
        parent::Model();
    }
  
    function get($id) 
    {
        // some function to get data from database
    }
}

A PHP Error was encountered

Severity: Notice

Message: Undefined property: Test::$category_model

Filename: controllers/test.php

Line Number: 16

class Test extends Controller 
{

    function Test()
    {
        parent::Controller();
    }
    
    function index() 
    {
        $this->load->model('category_model');
        $this->category_model->get(1);
    }
}
/* Location: ./system/application/controllers/test.php */

-----------------------------------------------------------------------------------

class Category_model extends Model 
{
    function Category_model() 
    {
        parent::Model();
    }
  
    function get($id) 
    {
        // some function to get data from database
    }
}
/* Location: ./system/application/models/category_model.php */

Test Object
(
    [_ci_scaffolding] => 
    [_ci_scaff_table] => 
    [config] => CI_Config Object
        (
            [config] => Array
                (
                    // hidden
                )

            [is_loaded] => Array
                (
                )

        )

    [input] => CI_Input Object
        (
            [use_xss_clean] => 
            [xss_hash] => 
            [ip_address] => 
            [user_agent] => 
            [allow_get_array] => 
            [never_allowed_str] => Array
                (
                    [[removed]] => [removed]
                    [[removed]] => [removed]
                    [[removed]] => [removed]
                    [[removed]] => [removed]
                    [[removed]] => [removed]
                    [[removed]] => [removed]
                    [] => -->
                    [ <![CDATA[
                )

            [never_allowed_regex] => Array
                (
                    [javascript\s*:] => [removed]
                    [expression\s*(\(|&\#40;)] => [removed]
                    [vbscript\s*:] => [removed]
                    [Redirect\s+302] => [removed]
                )

        )

    [benchmark] => CI_Benchmark Object
        (
            [marker] => Array
                (
                    [total_execution_time_start] => 0.79056900 1282368477
                    [loading_time_base_classes_start] => 0.79060700 1282368477
                    [loading_time_base_classes_end] => 0.80118600 1282368477
                    [controller_execution_time_( test / index )_start] => 0.80131200 1282368477
                )

        )

    [uri] => CI_URI Object
        (
            [keyval] => Array
                (
                )

            [uri_string] => test/index
            [segments] => Array
                (
                    [1] => test
                    [2] => index
                )

            [rsegments] => Array
                (
                    [1] => test
                    [2] => index
                )

            [config] => CI_Config Object
                (
                    [config] => Array
                        (
                           // hidden
                        )

                    [is_loaded] => Array
                        (
                        )

                )

        )

    [output] => CI_Output Object
        (
            [final_output] => 
            [cache_expiration] => 0
            [headers] => Array
                (
                )

            [enable_profiler] => 
        )

    [lang] => CI_Language Object
        (
            [language] => Array
                (
                )

            [is_loaded] => Array
                (
                )

        )

    [router] => CI_Router Object
        (
            [config] => CI_Config Object
                (
                    [config] => Array
                        (
                            // hidden
                        )

                    [is_loaded] => Array
                        (
                        )

                )

            [routes] => Array
                (
                    [scaffolding_trigger] => 
                )

            [error_routes] => Array
                (
                )

            [class] => test
            [method] => index
            [directory] => 
            [uri_protocol] => auto
            [default_controller] => welcome
            [scaffolding_request] => 
            [uri] => CI_URI Object
                (
                    [keyval] => Array
                        (
                        )

                    [uri_string] => test/index
                    [segments] => Array
                        (
                            [1] => test
                            [2] => index
                        )

                    [rsegments] => Array
                        (
                            [1] => test
                            [2] => index
                        )

                    [config] => CI_Config Object
                        (
                            [config] => Array
                                (
                                    // hidden
                                )

                            [is_loaded] => Array
                                (
                                )

                        )

                )

        )

    [load] => CI_Loader Object
        (
            [_ci_ob_level] => 1
            [_ci_view_path] => // hidden
            [_ci_is_php5] => 1
            [_ci_is_instance] => 
            [_ci_cached_vars] => Array
                (
                )

            [_ci_classes] => Array
                (
                )

            [_ci_loaded_files] => Array
                (
                )

            [_ci_models] => Array
                (
                    [0] => category_model
                )

            [_ci_helpers] => Array
                (
                )

            [_ci_plugins] => Array
                (
                )

            [_ci_varmap] => Array
                (
                    [unit_test] => unit
                    [user_agent] => agent
                )

        )

    [db] => CI_DB_mysql_driver Object
        (
            // hidden
        )

)

class Test extends Controller {
    function Test()
    {
        parent::Controller();
    }
    
    function index() 
      {
        $CI =& get_instance();
        $CI->load->model('category_model');
        $CI->category_model->get(1);
    }
}

function model($model, $name = '', $db_conn = FALSE)
    {        
        if (is_array($model))
        {
            foreach($model as $babe)
            {
                $this->model($babe);    
            }
            return;
        }

        if ($model == '')
        {
            return;
        }
    
        // Is the model in a sub-folder? If so, parse out the filename and path.
        if (strpos($model, '/') === FALSE)
        {
            $path = '';
        }
        else
        {
            $x = explode('/', $model);
            $model = end($x);            
            unset($x[count($x)-1]);
            $path = implode('/', $x).'/';
        }
    
        if ($name == '')
        {
            $name = $model;
        }
        
        if (in_array($name, $this->_ci_models, TRUE))
        {
            return;
        }
        
        $CI =& get_instance();
        if (isset($CI->$name))
        {
            show_error('The model name you are loading is the name of a resource that is already being used: '.$name);
        }
    
        $model = strtolower($model);
        
        if ( ! file_exists(APPPATH.'models/'.$path.$model.EXT))
        {
            show_error('Unable to locate the model you have specified: '.$model);
        }
                
        if ($db_conn !== FALSE AND ! class_exists('CI_DB'))
        {
            if ($db_conn === TRUE)
                $db_conn = '';
        
            $CI->load->database($db_conn, FALSE, TRUE);
        }
    
        if ( ! class_exists('Model'))
        {
            load_class('Model', FALSE);
        }

        require_once(APPPATH.'models/'.$path.$model.EXT);

        $model = ucfirst($model);
                
        $CI->$name = new $model();
        $CI->$name->_assign_libraries();
        
        $this->_ci_models[] = $name;

        // tracing 
        print_r($CI);
        $CI->category_model->get(1);
    }