PHP中的父，子JSON解析？

Question

I have a JSON file with a structure as below:

{
    "data": {
        "last_all": {
            "value": "1194999",
            "value_int": "2342",
            "display": "332",
            "disp1": "953.3",
            "current": "BLR"
        },
        "item": "NRF",
        "low": "494.55"
    }
}

How would I go about getting the value from "display" from last_all?

This part is where I get stuck: print $obj['last_all']['display']; you cant pass more then 3 params so I cant tell PHP to look under data then last_all then display.

Answer 1

Simple oversight. You're missing 'data' in your array reference:

$obj = json_decode($json_string, true);
print $obj['data']['last_all']['display'];