Foreach duplicating when creating object of objects - php

Question

What I have
So I have a variable named result that is formatted like this:
Array
(
[0] => stdClass Object
(
[description] => dev1
[id] => 09A
[sum] => 52
[completed_pct_completed] => 97.97
[completed_pct_1msec] => 11.44
....
)
[1] => stdClass Object
(
[description] => dev1
[id] => 273
[sum] => 59
[completed_pct_completed] => 94.43
[completed_pct_1msec] => 10.95
....
)
[2] => stdClass Object
(
[description] => dev1.1
[id] => 28A
[sum] => 39
[completed_pct_completed] => 95.55
[completed_pct_1msec] => 20.78
....
)
[3] => stdClass Object
(
[description] => dev1.1
[id] => 28B
[sum] => 31
[completed_pct_completed] => 91.55
[completed_pct_1msec] => 28.78
....
)
....
There are about 250 different objects. The problem with this current order is that the description of each becomes redundant to the point that I just one want to put all the data of each description into an object. Descriptions go by dev1.x, where x can be a different number or letter or whatever, doesn't matter.
What I want to do:
I'm trying to reorder $result into the format below. Pretty much, by traversing each item in the $result array, each description in result will be it's own property in a new object. Inside of each description property will be subitems like id, sum, completed_pct_completed, etc. It will look like this:
stdClass Object
(
[dev1] => stdClass Object
(
[id] => Array
(
[0] => 182
[1] => 218
[2] => 218
[3] => 021
[4] => 186
[5] => 287
[6] => 21A
)
[sum] => Array
(
[0] => 567
[1] => 567
[2] => 567
[3] => 567
[4] => 567
[5] => 567
[6] => 567
)
[completed_pct_completed] => Array
(
[0] => 567
[1] => 567
[2] => 567
[3] => 567
[4] => 567
[5] => 567
[6] => 567
)
[completed_pct_1msec] => Array
(
[0] => 567
[1] => 567
[2] => 567
[3] => 567
[4] => 567
[5] => 567
[6] => 567
)
.........
)
[dev1.1] => stdClass Object
(
[id] => Array
(
[0] => 182
[1] => 329
[2] => 465
[3] => 685
[4] => 686
[5] => 607
[6] => 61A
)
[sum] => Array
(
[0] => 567
[1] => 567
[2] => 567
[3] => 567
[4] => 567
[5] => 567
[6] => 567
)
[completed_pct_completed] => Array
(
[0] => 567
[1] => 567
[2] => 567
[3] => 567
[4] => 567
[5] => 567
[6] => 567
)
[completed_pct_1msec] => Array
(
[0] => 567
[1] => 567
[2] => 567
[3] => 567
[4] => 567
[5] => 567
[6] => 567
)
............
)
............
What I've done so far
So here's how I've constructed what I want so far:
I made an object with properties of each unique description:
$object = new STDClass();
//$flipped is the transposed version of $result, then I got unique names
foreach (array_unique($flipped['description']) as $string)
$object->{$string} = array();
This went perfectly fine. Then, I added the subitems to each description property in $object
$dummyObject = new STDClass();
foreach ($object as $objectKey=>$objectValue) {
foreach ($result[0] as $key=>$value){
if ($key!='description'){
$dummyObject->{$key}=array();
$object->$objectKey=$dummyObject;
}
}
}
This also went fine.
The problem here is inserting the data into each id and summary, etc.. Here's what I've done:
//add data to the subitems
//foreach dev1.x => array
foreach ($object as $key => $nextObject)
{
//foreach array as subitems(id, board, etc.) => array
foreach ($nextObject as $nextKey => $dataArray)
{
$dummyArray = array();
foreach ($result as $array)
{
foreach ($array as $arrayKey => $arrayValue)
{
if ($array->{'description'} == $key) {
if ($nextKey == $arrayKey) {
$dummyArray[]=$arrayValue;
}
}
}
}
$object->{$key}->{$nextKey} = $dummyArray;
}
}
In the end, all the data from the last dev1.x property ends up being overwritten into every single dev1.x property. I've tried adding break; in multiple places hoping that I'd be able to deduce what is going wrong. I have a gut feeling that there's more going on than I know with the foreach statements. Would anyone mind helping me with this?
Thanks

Answer 1

It looks like it may be less complicated than it seems. Unless I'm misunderstanding what the transformation should be, you can do it like this:
foreach ($result as $obj) {
foreach ($obj as $key => $value) {
if ($key != 'description') {
$new_result->{$obj->description}->$key[] = $value;
}
}
}
This should create the object and add the appropriate properties and values all at once.
The reason you're getting the duplication is in this part:
$dummyObject = new STDClass();
foreach ($object as $objectKey=>$objectValue) {
foreach ($result[0] as $key=>$value){
if ($key!='description'){
$dummyObject->{$key}=array();
$object->$objectKey=$dummyObject;
}
}
}
When you do $object->$objectKey=$dummyObject; because you created the object before the loop, you're resetting and reassigning the same object to each $objectKey. So when you fill it with values later, you just end up with multiple copies of whatever the last one was. If you use a copy of the object insteady ($object->$objectKey= clone $dummyObject;) it should work. But it does seem a bit overcomplicated.

Answer 2

Just create keys while iterating:
$data = new stdClass();
foreach ($result as $object) {
$description = $object->description;
isset($data->{$description}) or $data->{$description} = new stdClass();
foreach ($object as $name => $value) {
if ($name === 'description') { continue; }
$data->{$description}->{$name}[] = $value;
}
}
I don't like descriptions as field names though. Access to $data->{'dev1.1'} is ugly. Would pack it into an array of objects, but description property would be just a string and other properties would be aggregated arrays. It would need some changes in procedure (index of descriptions propably).