Specific value in an array does not work - php

Question

I have a question about my array. How can I get only data of milestone in my milestone array?
I have a query which is a prefixed array. I get data of milestones and milestonefases (this is milestone parts).
This is my code:
$stones_fases = array();
while ($row = $db->fetchassoc($result)){
$milestonefase = array();
$milestone = array();
foreach ($row as $mkey => $mvalue){
$milestone[$mkey] = $mvalue;
foreach ($row as $fkey => $fvalue){
$milestonefase[$fkey] = $fvalue;
}
}
if (!isset($stones_fases[$milestone['milestone_id']])){
$stones_fases[$milestone['milestone_id']] = $milestone; //['client']['milestone_verkocht_id']
}
$stones_fases[$milestone['milestone_id']][$milestonefase['milestonefase_id']] = $milestonefase['milestonefase_titel'];
}
I get this:
Array
(
[int] => Array
(
[milestone_id] => int
[milestone_titel] => string
[client] => string
[milestone_verkocht_id] => 99
[milestonefase_id] => 10
[milestonefase_titel] => string
[milestonefase_milestone_id] => 6
[10] => string
[11] => string
)
)
But I want this:
Array
(
[int] => Array
(
[milestone_titel] => string
[client] => string
[milestone_verkocht_id] => int
[10] => string
[11] => string
)
)
My query is this:
$project = $_COOKIE['project'];
$query = " SELECT
a.id AS `milestone_id`,
a.titel AS `milestone_titel`,
a.client AS `client`,
a.verkocht_id AS `milestone_verkocht_id`,
b.id AS `milestonefase_id`,
b.titel AS `milestonefase_titel`,
b.milestone_id AS `milestonefase_milestone_id`
FROM `milestones` a
INNER JOIN `milestone_parts` b ON a.id=b.milestone_id
WHERE a.verkocht_id = '{$project}' ";
$result= $db->query($dbh, $query);

Answer 1

I solved my own problem!
If i do this:
while ($row = $db->fetchassoc($result)){
$stones_fases[$row['milestone_id']]['milestone_titel'] = $row['milestone_titel'];
$stones_fases[$row['milestone_id']]['milestone_client'] = $row['client'];
$stones_fases[$row['milestone_id']]['milestonesfases'][$row['milestonefase_id']] = $row['milestonefase_titel'];
}
I get what i expected:
Array
(
[2] => Array
(
[milestone_titel] => Beheer opleveren
[milestone_client] => stackoverflow
[milestonesfases] => Array
(
[1] => Menu bouwen
[2] => Pagina beheer CMS
[3] => Projecten CMS
[4] => Portfolio
[5] => Footer inbouwen
)
)
)
Look at that bunch of code what I wrote a day ago.
Do you see that nonsens of code what I wrote?
Take a look at my code which I wrote 1 minute ago!
I was struggling this for 3 days and now I solved my own problem!