curl_setopt($ch, CURLOPT_RETURNTRANSFER, 1);
curl_setopt($ch, CURLOPT_HEADER, 0);
$response = curl_exec($ch);
curl_close($ch);
$json = json_decode($response, true);
//-------------------------------------
$invIndexes = [];
foreach($json->rgInventory as $index){
    $invIndexes = $index;
}
//-------------------------------------
$makearray = (array)$invIndexes;
for($id = 0;$id < count($invIndexes);$id++){
    $index = $makearray[$id];
    $item = $json->rgDescriptions[$json->rgInventory[$index]->classid + "_" + $json->rgInventory[$index]->instanceid];
    if($item->tradeable != 1){
        continue;
    }
    $ItemName = $item->market_hash_name;
}
var_dump($ItemName);