PHP Iterate through arrays in object within an array

i have a pretty weird json here. Im trying to iterate through every subscription object and get some data

Here is the json

{
   "result":"success",
   "data":{
      "subscriptions":[
         {
            "name":"app_generator",
            "expirey":1628188363942,
            "hwids":3,
            "hwids_used":[
               "dc253a62ea65cd92c6cb26f15330cf4a8f9e5c3ecf7caae161a3f97de4c84515",
               "efede5757f512f9eae1d600302ca5c4e6a3cadb0658310c91c6da2ada68175f4"
            ]
         },
         {
            "name":"apple",
            "expirey":1625596518277,
            "hwids":2,
            "hwids_used":[
               "dc253a62ea65cd92c6cb26f15330cf4a8f9e5c3ecf7caae161a3f97de4c84515",
               "dc253a62ea65cd92c6cb26f15330cf4a8f9e5c3ecf7caae161a3f97de4c84515a"
            ]
         }
      ]
   }
}

The code i tried was:

foreach($json['result']['data']['subscriptions'] as $a)
{
  //print_r($a);
  $expirey = $a['expirey']
}

Im just getting a lot of errors. Let me know what the correct approach would be. My goal is to mainly get the name & expirey data

source https://stackoverflow.com/questions/67863122/php-iterate-through-arrays-in-object-within-an-array