Codeigniter Select Box Validation Using Validation Library

This code snippet will explain you how to validate a select box (drop down box) using Codeigniter. Create a dropdown box in the view file and add a default option. Set the value of default option (Example 0 ). Then add a new rule called selected to validation library and use the rule inside your controllers to validate the select box. All the source codes and instructions are given below.

public function loadView($data='') {
                $data['message'] = $this->message;
                $this->load->view('test_view',$data);

}

public function validate_select() {

                $this->validation->set_error_delimiters('

', '

');

                // Validation rules
                $rules['selCountry']    = "selected[selCountry]";
                $this->validation->set_rules($rules);

                $fields['selCountry']           = "Country";
                $this->validation->set_fields($fields);

                if ($this->validation->run() == FALSE) {

                        $this->message = $this->validation->error_string;

                        $this->loadView();

                } else {
                        // Validation is done and process with the logic
                }
}

function selected($field){
                
                if ($field == '0')
                {
                        return FALSE;
                }
                
                return TRUE;
}

$lang['selected']      = "The %s field is required.";

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