Get name of a random array from a JSON parent array

Question

I have some JSON like this:

{"100":{"id":100,"name":"example"},"200":{"id":200,"name":"example2"}}

Which I converted to an array:

[100] => Array
    (
        [id] => 100
        [name] => "example"
    )

[200] => Array
    (
        [id] => 200
        [name] => "example"
    )

I want to return a random [id] - or a random array name because they are the same as the IDs. How can I do this?

I've tried:

$src  = "http://domain.com/json.json";
$data = file_get_contents($src);
$obj  = json_decode($data, true);
$rand = array_rand($obj);
echo strval($obj[$rand]);

Which outputs:

Notice: Array to string conversion in C:/Users/Will/Documents/PHP/TestJson.php on line 7
Array

I want it to either output 100 or 200.

Amal · Accepted Answer · 2014-02-15 15:53:49Z

3

$jsonArr = json_decode($str, TRUE);
$rand_array_key = array_rand($jsonArr);
echo $jsonArr[$rand_array_key]['id'];

Demo

answered Feb 15, 2014 at 15:53

Amal

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