Cotroller

<?php
defined('BASEPATH') OR exit('No direct script access allowed');

class Jurnal_umum extends CI_Controller {

    function __construct(){
        parent::__construct();
        $this->load->model('m_jurnal');
        $this->load->library('form_validation');
        if ($this->session->userdata('status' != "login")) {
            redirect('auth');
        }
    }
    public function index()
    {
        $this->load->helper('url');
        $data['data_jurnal'] = $this->m_jurnal->ambildata();
        $data['rekening'] = $this->m_jurnal->get_rek();
        $this->load->view('halaman/jurnal_umum', $data);
    }

    public function add(){
        //$this->load->view('add');
        $this->_validate();
        $data = array(
            'no_jurnal' => $this->input->post('no_jurnal'),
            'tanggal' => $this->input->post('tanggal'),
            'no_bukti' => $this->input->post('no_bukti'),
            'no_rek' => $this->input->post('no_rek'),
            'nama_rek' => $this->input->post('nama_rek'),
            'debet' => $this->input->post('debet'),
            'kredit' => $this->input->post('kredit'),
            'keterangan' => $this->input->post('keterangan')
        );
        $insert = $this->m_jurnal->save($data);
        echo json_encode(array("status" == TRUE));
    }

    public function edit($id){
        $data = $this->m_jurnal->get_by_no($id);
        $data->tanggal = ($data->tanggal == '0000-00-00') ? '' : $data->tanggal;
        echo json_encode($data);
    }

    public function delete(){
            $id = $this->uri->segment(3);
            //$id =  $this->input->POST('id');
            $this->db->where('id', $id);
            $this->db->delete('jurnal_umum');
            redirect('jurnal_umum');
           // echo'<div class="alert alert-success">One record deleted Successfully</div>';
            exit;
    }

    private function _validate()
    {
        $data = array();
        $data['error_string'] = array();
        $data['inputerror'] = array();
        $data['status'] = TRUE;

        if($this->input->post('no_jurnal') == '')
        {
            $data['inputerror'][] = 'no_jurnal';
            $data['error_string'][] = 'No Jurnal is required';
            $data['status'] = FALSE;
        }

        if($this->input->post('no_bukti') == '')
        {
            $data['inputerror'][] = 'no_bukti';
            $data['error_string'][] = 'No Bukti is required';
            $data['status'] = FALSE;
        }

        if($this->input->post('tanggal') == '')
        {
            $data['inputerror'][] = 'tanggal';
            $data['error_string'][] = 'Tanggal is required';
            $data['status'] = FALSE;
        }

        if($this->input->post('no_rek') == '')
        {
            $data['inputerror'][] = 'no_rek';
            $data['error_string'][] = 'No Rekening is required';
            $data['status'] = FALSE;
        }

        if($this->input->post('nama_rek') == '')
        {
            $data['inputerror'][] = 'nama_rek';
            $data['error_string'][] = 'Nama Rekening is required';
            $data['status'] = FALSE;
        }

        if($data['status'] === FALSE)
        {
            echo json_encode($data);
            exit();
        }
    }

}