Latest JSON from GET Products breaks PHP 5.2.x json_decode

json_decode is returning null suddenly and json_last_error isn’t available in 5.2. I ran the same data on 5.3 and it decodes properly.

I’m exploring updating PHP with the client’s hosting company. But in the interim, is there an alternative endpoint for all products for only inventory control data like Total Available? (Or a parameter to limit the data returned by GET Products?)