codeigniter array and loop to insert for multiple data - php

Question

I want to make an invoice form. For this reason i need to insert multiple data at once. for example I want to input db 5 category sale or purchase product at a time. But I am not interested with insert_batch. I try but i got some null value in db.
My Model is:
<?php
class Purchase_model extends CI_Model{
public function purchase(){
$price = $this->input->post('price');
$quantity = $this->input->post('quantity');
$date = $this->input->post('date');
$vendor_name = $this->input->post('vendor_name');
$model = $this->input->post('model');
$invoice_no = $this->input->post('invoice');
//$temp = count($this->input->post('vendor_name'));
for($i=0; $i<10; $i++){
$data = array(
'date'=>$date[$i],
'vendor_name'=>$vendor_name[$i],
'model'=>$model[$i],
'price' =>$price[$i],
'purchase_quantity'=>$quantity[$i],
'amount' =>$price[$i]*$quantity[$i],
'invoice_no'=>$invoice_no[$i]
);
$insert = $this->db->insert('purchase',$data);
return $insert; }
}}
My controller is:
public function purchase(){
if($this->Purchase_model->purchase()){
$this->session->set_flashdata('Success',
'You are entered data successfully');
redirect('home/purchase_form');
}
}
My view for example:
<?php echo form_label ('Price:'); ?>
<select name="price[]" id="price" class="input-xlarge">
</select>
<?php echo form_label ('Quantity'); ?>
<?php
$data = array ('name' =>'quantity[]',
'class' =>'input-xlarge',
'value' => set_value('quantity')); ?>
<?php echo form_input ($data); ?>
<?php echo form_label ('Price:'); ?>
<select name="price[]" id="price2" class="input-xlarge">
</select>
<?php echo form_label ('Quantity'); ?>
<?php
$data = array ('name' =>'quantity[]',
'class' =>'input-xlarge',
'value' => set_value('quantity')); ?>
<?php echo form_input ($data); ?>
Please help.

Answer 1

The problem has been solved. My mistake in my model. The correct model is
public function purchase(){
$data = array();
$temp = count($this->input->post('quantity'));
for($i=0; $i<$temp; $i++){
$invoice_no = $this->input->post('invoice');
$date = $this->input->post('date');
$price = $this->input->post('price');
$quantity = $this->input->post('quantity');
$vendor_name = $this->input->post('vendor_name');
$model = $this->input->post('model');
if( $quantity[$i]!= '') {
$data[] = array(
'date'=>$date,
'vendor_name'=>$vendor_name[$i],
'model'=>$model[$i],
'price' =>$price[$i],
'purchase_quantity'=>$quantity[$i],
'amount' =>$price[$i]*$quantity[$i],
'invoice_no'=>$invoice_no
);} }
$insert = count($data);
if($insert)
{
$this->db->insert_batch('purchase', $data);
}
return $insert;
}
Thanks every one who try to help me.