You can validation when you will insert data in your database by codeigniter

CI Validation

public function save_football()
	{
		$login_info = $this->session->userdata('login_info');
        if ($login_info['logged_in'] == 1 && $login_info['user_details']['status'] == 1):

			$this->form_validation->set_error_delimiters($this->alert->dmStart(), $this->alert->dmEnd());

			$data = array('required' => 'Please write %s');
			$this->form_validation->set_rules('team_name', 'team name', 'trim|required', $data);

			$data = array('required' => 'Please select %s');
			$this->form_validation->set_rules('status', 'football status', 'trim|required', $data);
			if (empty($_FILES['football_logo']['name']))
			{
				$data = array('required' => 'Please select %s');
			    $this->form_validation->set_rules('football_logo', 'team logo', 'required');
			}

			
			if ($this->form_validation->run() == FALSE) 
			{
				self::football_form();
			}
			else
			{
				if ( !empty($_FILES['football_logo']['name'] )) 
				{
					$football_logo = $this->Football_model->uploadImage('football_logo','football_logo','gif|jpg|png',1);
					$attachment  = $football_logo['file_name'];
					if ( $football_logo['file_name'] == '' ) 
					{
						$this->session->set_flashdata('FlsMsg',$this->alert->danger($football_logo['upload_error']));
						redirect( 'Football');
					}
				}
				else
				{
					$attachment = '';
				}

				$created_by    = $login_info['user_details']['id'];
				$data = array(
					'team_name'		=>	$this->input->post('team_name'),
					'description'	=>	$this->input->post('description'),
					'football_logo'	=>	$attachment,
					'team_image'	=>	$this->input->post('team_image'),
					'status'		=>	$this->input->post('status'),
					'created_by'	=>	$created_by,
					'ip_address'	=>	$_SERVER['REMOTE_ADDR'],
					'machine_name'	=>	php_uname('n')
				);			

				$data = $this->security->xss_clean($data);
				$football_insert = $this->Football_model->insert_football($data);
				if( $football_insert ) :
					$this->session->set_flashdata('FlsMsg',$this->alert->success('Team create process'));
					redirect( 'Football');
				else:
					$this->session->set_flashdata('FlsMsg',$this->alert->danger('Team create process'));
					redirect( 'Football');
				endif;
			}
		else:
			$this->load->view('login/login_signup');			
		endif; 
	}