PHP Decode

<?php

use App\Models\CompanyUser;
use Illuminate\Database\Migrations\Migration;
use Illuminate\Database\Schema\Blueprint;
use Illuminate\Support\Facades\Schema;

return new class extends Migration {
    /**
     * Run the migrations.
     *
     * @return void
     */
    public function up()
    {
        Schema::table('company_user', function (Blueprint $table) {
            $table->unsignedInteger('number_years_active')->default(3);
        });

        CompanyUser::cursor()->each(function ($cu) {
            $cu->number_years_active = 3;
            $cu->save();
        });
    }

    /**
     * Reverse the migrations.
     *
     * @return void
     */
    public function down()
    {
    }
};
 ?>