If ($result ['status']==1) {//in_app Sort by time. The data returned by Apple is not stable, so you need to sort it manually
$in_app = $result['data']['receipt']['in_app'];
array_multisort(array_column($in_app, 'purchase_date'),SORT_DESC,$in_app);
$result['data']['receipt']['in_app'] = $in_app;
}