Verifikasi upload file excel

<?php

namespace App\Controllers;

use App\Models\VerifikasiModel;
use App\Models\DataaxModel;
use App\Models\BomModel;
use App\Models\TempModel;
use App\Models\CekModel;
use App\Controllers\BaseController;

class Verifikasi extends BaseController
{
    public function __construct()
    {
        $this->verifikasi_model = new VerifikasiModel();
        $this->dataax_model     = new DataaxModel();
        $this->bom_model        = new BomModel();
        $this->temp_model        = new TempModel();
        $this->cek_model        = new CekModel();
        $this->validation       = \Config\Services::validation();
        $db = \Config\Database::connect();
    }

    public function cek_ax_upload()
    {
        $product_id     = $this->request->getVar('ch_item_number');
        $product_lot    = $this->request->getVar('ch_lot');
        $product_side   = $this->request->getVar('ch_side');

        $file_excel = $this->request->getFile('fileexcel');
        $ext = $file_excel->getClientExtension();
        if($ext == 'xls')
        {
            $render = new \PhpOffice\PhpSpreadsheet\Reader\Xls();
        }else{
            $render = new \PhpOffice\PhpSpreadsheet\Reader\Xlsx();
        }
        $spreadsheet = $render->load($file_excel);

        $data = $spreadsheet->getActiveSheet()->toArray();
        foreach($data as $x => $row)
        {
            if($x == 0)
            {
                continue;
            }

            $part_code      = $row[0];
            $part_name      = $row[1];
            $lot_part       = $row[2];
            $picking_date   = $row[3];

            //cek data pada tabel 'tb_bom', apakah data excel yang akan diupload sesuai dengan data pada 'tb_bom'.?
            $CekData = $db->table('tb_bom')->getWhere(['bom_product_number' => $product_id, 'bom_part_item !=' => $part_code, 'bom_operation_number' => $product_side])->getResult();

            foreach($CekData as $key => $data)
            {
                $bom_part_item = $data->bom_part_item;
                $bom_part_name = $data->bom_part_name;
                $bom_kode_gudang = $data->bom_kode_gudang;
            }

            //jika ada data pada tabel 'tb_bom' yang tidak ada di dokumen excel akan diinsert ke tabel 'temp_hasil_cek'
            if($CekData)
            {
                $simpanData = [
                    'part_code'         => $bom_part_item,
                    'part_name'         => $bom_part_name,
                    'part_kode_gudang'  => $bom_kode_gudang,
                    'created_by'        => session()->get('user_name'),
                    'created_date'      => date('Y-m-d H:i:s')
                ];

                $db->table('temp_hasil_cek')->insert($simpanData);
            }else{
                session()->setFlashdata('message', 'Data valid');
                session()->setFlashdata('alert-class', 'alert-danger toastrDefaultError');
            }

        }
        return redirect()->to('/hasil_verifikasi');
    }
}