array_merge & in_array not what I need - php

Question

I have an array like this;
$array = array(
array('id' => 1, 'amount' => 104,
array('id' => 46, 'amount' => 200,
array('id' => 1004, 'amount' => 200
);
and another array like this;
$array2 = array(
array('id' => 206, 'amount' => 50,
array('id' => 1, 'amount' => 96,
array('id' => 88, 'amount' => 2
);
How to I add check if the 'id' in array2 exists in $array. If it does at the 'amount' of $array2 to $array, if it doesn't exist append the id and amount onto the end of $array. I want the output result to look like this:
array {
[0] id = 1 amount = 200
[1] id = 46 amount = 200
[2] id = 1004 amount = 200
[3] id = 206 amount = 50
[4] id = 88 amount = 2
}
I have tried using array_merge and in_array but can't seem to get my head around it working.

Answer 1

You could try somthing like this :
foreach ($array as $key => $value) {
$found = false ;
foreach ($array2 as $key2 => $value2) {
if ($value2['id'] == $value['id']) {
$array2[$key2]['amount'] += $value['amount'];
$found = true;
break;
}
}
if (!$found) {
$array2[] = $value ;
}
}
print_r($array2);
outputs :
Array
(
[0] => Array
(
[id] => 206
[amount] => 50
)
[1] => Array
(
[id] => 1
[amount] => 200
)
[2] => Array
(
[id] => 88
[amount] => 2
)
[3] => Array
(
[id] => 46
[amount] => 200
)
[4] => Array
(
[id] => 1004
[amount] => 200
)
)
EDIT After comments, updated code with a final check to remove duplicated rows :
foreach ($array as $key => $value) {
$found = false ;
foreach ($array2 as $key2 => $value2) {
if ($value2['id'] == $value['id']) {
$array2[$key2]['amount'] += $value['amount'];
$found = true;
break;
}
}
if (!$found) {
$array2[] = $value ;
}
}
$final = [];
foreach ($array2 as $key1 => $value) {
$found = false ;
foreach ($final as $key2 => $value2) {
if ($value2['id'] == $value['id']) {
$final[$key2]['amount'] += $value['amount'];
$found = true;
break;
}
}
if (!$found) {
$final[] = $value ;
}
}
var_dump($final) ;