foreach($yourArrayName as $object)
{
    $arrays[] = $object->toArray();
}
// Dump array with object-arrays
dd($arrays);

Or when toArray() fails because it's a stdClass

foreach($yourArrayName as $object)
{
    $arrays[] =  (array) $object;
}
// Dump array with object-arrays
dd($arrays);

Not working? Maybe you can find your answer here:

Convert PHP object to associative array

You can use below solution

$yourArray = json_decode(json_encode($yourObject), true);

and this convert object to an array for more info

You can use the toArray method.

You haven an object and you can transform it to and array.

$dataArray=$data->toArray();

You can find this method in the Laravel documentation.

toArray is changing the collection of objects into an array of objects, like it should. If you want the objects inside the collection to also be arrays, you need to first convert each object:

$collection = DB::table('users')->where([...])->take(1)->get();

$array = $collection->map(function($obj){
  return (array) $obj;
})->toArray();

To use this function in your whole app, you could add a collection macro in the boot method of one of your service providers:

Collection::macro('toArrays', function () {
  return $this->map(function ($value) {
    return (array) $value;
  })->toArray();
});

And this at the top of the file of the service providers:

use Illuminate\Support\Collection;

Then anywhere you get a set of DB results you can just call toArrays on it:

DB::table('users')->where([...])->get()->toArrays();

Using array_map and casting to an array should be sufficient:

$data = array_map(function($object){
    return (array) $object;
}, $data);

I also wouldn't run queries inside a loop. You should try getting that data in one query from the db. Something like this could work:

$data = DB::table('order_details')
    ->join('orders', 'order_details.oid', '=', 'orders.oid')
    ->select('order_details.oid', 'orders.ostatus')
    ->whereIn('order_details.oid', $oid)->get();

Edit

As it has been mentioned in another answer shortly let me explain how you can accomplish the same by setting PDO to FETCH_ASSOC:

DB::setFetchMode(PDO::FETCH_ASSOC);
$data = DB::table('order_details') .... ->get();

However this changes the fetch mode globally for the rest of the request (at least if you don't open a new connection). To be save you should change it back afterwards:

DB::setFetchMode(PDO::FETCH_ASSOC);
$data = DB::table('order_details') .... ->get();
DB::setFetchMode(PDO::FETCH_CLASS);

Or even back it up first if you can't be sure what default is used:

$fetchModeBefore = DB::getFetchMode();
DB::setFetchMode(PDO::FETCH_ASSOC);
$data = DB::table('order_details') .... ->get();
DB::setFetchMode($fetchModeBefore);

Please try this. this will return array of objects.

$result = json_decode(json_encode($data, true));

*Updated

if you want to convert all nested properties to the array, try this.

$result = json_decode(json_encode($data, true), true);