gallery error

PHP Code:

$this->load->model('gallery'); 


This is looking for a file in the models directory named Gallery.php, but you've pasted a gallery() method from models/Mpages.php.

Read the user guide, especially the Tutorial: https://codeigniter.com/user_guide/tutorial/index.html
and a few of the items in the General Topics section: https://codeigniter.com/user_guide/general/index.html

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