cannot load 'image_lib'

driechel · April 2012

In my advanced module I created a library file called: Createthumbs.php. It contains the following code:


<?php 

if ( ! defined('BASEPATH')) exit('No direct script access allowed');


class Createthumbs extends CI_Controller {
    
    
    function __construct()
    {
        parent::__construct();


        // load all the helpers we need
        $this->load->helper('convert');
        $this->load->helper('ajax');
        $this->load->helper('cookie');
        $this->load->helper('inflector');
        $this->load->helper('text');

        $this->load->library('image_lib');
        
        
        
    }
}

but when I load this library in my view I get the error message:


A PHP Error was encountered
Severity: Notice

Message: Undefined property: Dennie::$image_lib

Filename: fuel/Loader.php

Line Number: 215

Why could this be?

admin · April 2012

How are you accessing it in your view? Are you using the object "$this" or the object "$CI". They both represent the same thing but "$CI" is probably what is available for you.

driechel · April 2012

I was using the $this object. The $CI object (after assigning it to get_intance) gives the same error. Here is my code in the view:


	
	<?php 
	$CI =& get_instance();
	$CI->load->library('createthumbs') 
	?>

or



	<?php 
	$this->load->library('createthumbs') ;
         ?>

For example loading the library in the view works fine:


$this->load->library('image_lib');

driechel · April 2012

By the way. Like in the Fuel_base_controller, this works:
$this->load->library('form');

admin · April 2012

Is $image_lib referenced in createthumbs? If so, are you using $CI =& get_instance(); in the createthumbs library?

driechel · April 2012

Yes it is referenced. I used both $this and $CI=& get_instance(). Both did not work.
I solved my problem by not extending the CI_Controller but by just making a class:


class Createthumb {

     public function __construct( $params = array() ) {
       $this->CI =& get_instance();
        if (count($params) > 0)
        {
            $this->initialize($params);     
        }
       $this->CI->load->library('image_lib');
        
    }

    function initialize($config = array())
    {
        foreach ($config as $key => $val)
        {
            if (isset($this->$key))
            {
                $this->$key = $val;
            }
        }
    }


    function makethumb( $img, $width, $heigth ) {

        $fotonaam = basename($img);
        $fotonaam_no_extension = pathinfo($img, PATHINFO_FILENAME);
        $img_tumb_path =  dirname($img) . '/thumbs/' . $fotonaam_no_extension . '_' . $width . '_' . $heigth . '.jpg' ;
        $img_source_path =   $img . '/' . $fotonaam;
        // ChromePhp::log(MODULES_PATH);

        if (!file_exists($img_tumb_path)) {
        $config['image_library'] = 'gd2';
        $config['source_image'] = $img_source_path;
        $config['width'] = $width;
        $config['height'] = $heigth;
        $config['new_image']        = $img_tumb_path;

       $this->CI->image_lib->initialize($config);
        if ( !  $this->CI->image_lib->resize()) 
        {
               ChromePhp::log($this->CI->image_lib->display_errors());
        }
        $this->CI->image_lib->clear();
        }
        return dirname( $_SERVER['SCRIPT_NAME']) . '/' . $img_tumb_path;

    }
         
}

Thanks for all the feedback again.
If anyone comes up with an idea I would still like to know what could be the problem.

Lance · April 2012

Why did you want to extend the CI_Controller class? What you have working now looks correct to me.

Anyway, I tried it and had no errors with:

Createthumbs.php in /modules/my_module/libraries/


class Createthumbs extends CI_Controller {

    function __construct()
    {
        parent::__construct();
	
        $this->load->helper('convert');
        $this->load->helper('ajax');
        $this->load->helper('cookie');
        $this->load->helper('inflector');
        $this->load->helper('text');

        $this->load->library('image_lib');
		
         echo 'loaded';
    }
}

In a view in the adv. module:


$this->load->module_library('my_module', 'createthumbs');

No errors, just see 'loaded' on the screen.

driechel · April 2012

Okay thanks. Will check it again with the module_library.

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cannot load 'image_lib'

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