How to get a single value using codeigniter and mysql - php

Question

i need to get service_price field from db by using this code.
public function get_service_price($id) {
$this->db->select('*');
$this->db->from('service');
$this->db->where('id', $id);
$query = $this->db->get('service');
return $query->row('service_price');
}
here i called this function function.
public function vat($vat=14.5)
{
$id = $this->uri->segment(4);
$data['service_price'] = $this->service_model->get_service_price($id);
$price_with_vat=0;
$price_with_vat = $data + ($vat*($data/100));
//$price_with_vat=78.005;
$price_with_vat = round($price_with_vat, 2);
$this->load->view('admin/service/vat', $price_with_vat);
}
There some mistake. please kindly help me

Answer 1

To get first row use following
$query = $this->db
->where('id', $id);
->get('service');
$firstRow = $query->first_row();
return $firstRow->service_price;

Answer 2

Use this code for your model :
public function get_service_price($id) {
$this->db->select('service_price');
$this->db->from('service');
$this->db->where('id', $id);
$query = $this->db->get();
return $query->row();
}

Answer 3

in model
public function get_service_price($id) {
$query = $this->db->query("SELECT * FROM service WHERE id='$id'");
$result = $query->result_array();
return $result;
}
in controller
$id = $this->uri->segment(4);
$data['service_price'] = $this->service_model->get_service_price($id);
$price_with_vat=0;
$price_with_vat = $data[0]['table_field_name'] + ($vat*($data[0]['table_field_name']/100)); //$price_with_vat=78.005;
$price_with_vat = round($price_with_vat, 2);
$this->load->view('admin/service/vat', $price_with_vat);
in view
foreach ($service_price as $new_service_price)
{
echo $new_service_price['table_field_name'];//exapmle echo $new_service_price['service_price']
}