CodeIgniter 3 - Extending Form Validation not working

MY_Form_validation should go in application/core if you are extending the built-in one.

That doesn't sound right. Since it's loaded via $this->load->library('form_validation'), the library() method would call _ci_load_library(), which, in turn, would call _ci_load_stock_library(), which eventually does this:

PHP Code:

        $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);
                }
                else
                {
                    log_message('debug', $path.' exists, but does not declare '.$prefix.$library_name);
                }
            }
        } 


In general, when overloading system classes you just put the file in the equivalent directory in application. In other words, you would override /system/libraries/Form_validation.php with /application/libraries/MY_Form_validation.php

Bonfire

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