is_unique extended

[eluser]sv3tli0[/eluser]

Code:

public function exists($str, $field)
   {
      if (substr_count($field, '.')==3)
      {
         list($table,$field,$id_field,$id_val) = explode('.', $field);
         $query = $this->CI->db->limit(1)->where($field,$str)->where($id_field.' != ',$id_val)->get($table);
      } else {
         list($table, $field)=explode('.', $field);
         $query = $this->CI->db->limit(1)->get_where($table, array($field => $str));
      }
      
      return $query->num_rows() !== 0;
    }

And I add this new method to check if something exists, excelent for username, email checks or others..
Its the same method as is_unique, just it gives the opposite result.