usky-website/web/application/models/web_setting_model.php

<?php
class Web_Setting_model extends MY_Model
{
    
    private $table_name = 'web_setting';

    
    public function insert($parm)
    {
        $this->db->insert($this->table_name, $parm);
        return $this->db->insert_id();
    }

    
    public function update($name, $parm)
    {
        $this->db->select('count(*) as count');
        $this->db->where('name', $name);
        $query = $this->db->get($this->table_name);
        $ret = $query->row_array();
        if ($ret['count']==0) {
            $this->insert($parm);
        } elseif ($ret['count']==1) {
            $this->db->where('name', $name);
            $this->db->update($this->table_name, $parm);
            return $this->db->affected_rows(); 
        }
        return false; 
    }
    public function getValueByName($name)
    {
        $this->db->select('value');
        $this->db->where('name', $name);
        $query = $this->db->get($this->table_name);

        return $query->num_rows() > 0 ? $query->result_array() : false;
    }
}