PHP Codeigniter Array Calculations - php

Question

I am having a problem, which I hope someone could help me with.
I am using CodeIgniter to pull results from a database, and I would like to add these results together. I am not much of a PHP developer, so I am not too sure where to start.
This is the function I am using;
function get_warranty($id) {
$this->db->select('warranty');
$this->db->where('sID', $id);
$query = $this->db->get('cars');
return $query->result();
}
This function, returns this;
[warranty] = Array
(
[0] => stdClass Object
(
[warranty] => 2
)
[1] => stdClass Object
(
[warranty] => 5000
)
)
But, I would like it to return this;
[warranty] = 5002;
So, it simply adds up each result it finds.
Any help at all, would be greatly appreciated, as I say, I'm not much of a PHP developer, so I don't even know where to start.
Thanks in advance!

Answer 1

The $query -> result() function returns an array of objects with query results...
See documentation: http://ellislab.com/codeigniter/user-guide/database/active_record.html#select
This is the modified function I propose, which simply returns an integer with the total sum, as you need:
function get_warranty($id) {
// Query composition
$this->db->select('warranty');
$this->db->where('sID', $id);
$query = $this->db->get('cars');
// Iterate through the returned objects and accumulation in $warranty
foreach ($query->result() as $row) {
$warranty += $row->warranty;
}
return $warranty;
}
Kind regards.

Answer 2

In place of return $query->result(); use return $query->result_array();. You will get returned with pure array.
Now you can use foreach loop to add the values up like this:
$add_up = 0;
foreach ($reulst_array as $values)
{
$addup = $add_up + $values;
}
This way variable $add_up will contain the added array.