CodeIgniter: Call to a member function on a non-object

Monday, June 15th, 2009

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I recently ran into a problem using CodeIgniter where I kept receiving the error: “Call to a member function on a non-object”. This problem occurred when I was trying to use a method from one model from within another model.

I have a model named mGalleryImages. Within this model, I have a method named addGalleryImages. Within this method, I load another model and tried to call a method from the loaded model:

function addGalleryImages(){
     ...
     $this->load->model('mUtilImages');
     ...
     $this->mUtilImages->setImageFile($_FILES['uploadFile']);
}

I receive the error when the setImageFile method is called. The problem is that when the model sees “$this”, it is looking for a method within the mGalleryImages model. The solution was to use a CodeIgniter function named get_instance().

function addGalleryImages(){
     ...
     $CI =& get_instance();
     $this->load->model('mUtilImages');
     ...
     $CI->mUtilImages->setImageFile($_FILES['uploadFile']);
}

Easy enough, but I would never have thought that this was the problem. I played with this code for hours, trying to figure out why it didn’t work similarly to a regular PHP class. But now I know.

13 Responses to “CodeIgniter: Call to a member function on a non-object”

• anata_arie Says:
  October 24th, 2009 at 11:34 am
  
  

  Hi, I’ve try your solution to use $CI = & get_instance();
  but it didn’t work too. Have you another solution?
  Thanks
  
  

• admin Says:
  October 24th, 2009 at 9:43 pm
  
  

  I need more information. Can u send me code snippets and let me know exactly where you receive the error?
  
  

• John P. Says:
  November 14th, 2009 at 9:31 am
  
  

  I think there is a problem with your code…

  function addGalleryImages(){
  …
  $CI =& get_instance();
  $this->load->model(‘mUtilImages’);
  …
  $CI->mUtilImages->setImageFile($_FILES['uploadFile']);
  }

  Shouldn’t it be:

  $CI->load->model(‘mUtilImages’);

  ?
  .-= John P.´s last blog ..Mouseterpiece Theatre =-.
  
  

• admin Says:
  November 15th, 2009 at 1:06 am
  
  

  I copied the code directly from a project that I worked on.
  
  

• Andy Says:
  December 15th, 2009 at 5:14 am
  
  

  Hi,

  I had exactly the same problem and this fixed it for me. Many thanks,

  Andy
  
  

• yaro Says:
  January 6th, 2010 at 4:54 am
  
  

  Hi,

  I searched a solution for this problem all evening yeaterday and nothing . Today i again search and…. it’s work!!! Big big thank’s!:)
  
  

• Dhrubo Says:
  February 3rd, 2010 at 11:45 pm
  
  

  I’ve meet this problem this morning and through your solution I’ve helped much. Thanks.
  
  

• Da BomB Says:
  March 25th, 2010 at 11:30 am
  
  

  This also works on view’s.

  When loading a view in a helper function the same error rises. with this solution it should work.

  I think it’s not a best practice, but it will do the job.
  
  

• Pravin Sawant Says:
  April 6th, 2010 at 11:48 pm
  
  

  Hi All,
  i am also facing the same problem and this solution works for me

  Thanks
  
  

• liaqat ali Says:
  August 11th, 2010 at 8:18 am
  
  

  Hi All, I am Developing a web site. my below code work perfectly. but i have a problem i want “$statsid” above the second foreach, i want to pass this as variable or id to controller to get the data from table where equls to this “$statsid”

  result() as $rows):?>

  <img src="config->item(‘base_url’).$rows->profile_picture_path;?>” />

  user_name;?> description;?>
  <a href="#nogo" id="status_id;?>” class=”image_title” />Comments

  status_id; ?>

  result() as $rs):?>

  <img src="config->item(‘base_url’).$rows->profile_picture_path;?>” />

  user_name;?> status_comment;?>
  
  

• Mahesh Says:
  November 24th, 2010 at 6:55 am
  
  

  Hi John,

  Your solution worked for me. Instead of using
  $this->load->model(‘myUtilImages’);
  I have used the below and it works fine
  $CI =& get_instance();
  $CI->load->model(’mUtilImages’);
  
  

• richard frick Says:
  February 1st, 2011 at 9:32 am
  
  

  thanks a lot!
  
  

• simelekete Says:
  August 27th, 2011 at 11:30 pm
  
  

  your solution help me much. thank you
  
  

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