通过codeigniter中的嵌套数组将多行插入数据库

according to insert multiple rows using one forigenk value in form

i want to insert multiple data at once through nested array. in my case data doesn't insert into the database. and no error messages to display.my code is below.

any one can please help me to slove this problem.

controller

public function create(){

//    validate fields
        $this->form_validation->set_rules('work_product_id', 'Work Product Id', 'required');
        $this->form_validation->set_rules('work_item_description', 'Work Item Description', 'required');
        $this->form_validation->set_rules('quantity', 'Quantity', 'required');
       $this->form_validation->set_rules('rate', 'Rate', 'required|numeric');
       $this->form_validation->set_rules('laboure_hrs', 'Laboure Hrs', 'required|numeric');
        $this->form_validation->set_rules('laboure_cost', 'Laboure Cost', 'required|numeric');

//            getting value of input fields


          if ($_POST) 
   {
        $project_id=$this->input->post('project');
        $staff_id=$this->input->post('staff_id');
        $item_no=$this->input->post('work_product_id');
        $description=$this->input->post('work_item_description');
        $qty=$this->input->post('quantity');
        $unit=$this->input->post('unit');
        $rate=$this->input->post('rate');
        $laboure_hrs=$this->input->post('laboure_hrs');
        $laboure_cost=$this->input->post('laboure_cost');
        $amount=$this->input->post('txtmultTotal');

        $data=[];

       for ($i = 0; $i < count($this->input->post('work_product_id')); $i++)
        {
           $data[$i] = array(
               'project_id' => $project_id,
               'staff_id' => $staff_id[$i],
               'item_no' => $item_no[$i],
               'description' => $description[$i],
               'qty' => $qty[$i],
               'unit' => $unit[$i],
               'rate' => $rate[$i],
               'laboure_hrs' => $laboure_hrs[$i],
               'laboure_cost' => $laboure_cost[$i],
               'amount' => $amount[$i],
            );
       }
        print_r($data);
        $this->boq_model->create($data);
    }
}

model

function create($data){
$this -> db-> insert_batch('boq',$data);
}

Try like this Comment //$data=[];

and in foreach

 $data[] = array(
 //ur data
   );