How to handle JSON/PHP array inside of array data

Question

I thought it would be simple but of course I'm at a roadblock, I'm new to handling JSON data but here is the info.

$new_item = '[2554560000, 18.26]';
$load = file_get_contents("json/graphlist.json");
$data = json_decode($load, true);
var_dump($data);
echo "<br /><br />";
echo ($data['product1']);
echo "<br /><br />";
echo json_encode($data);


$save = file_put_contents('json/graphlist.json', json_encode($data));

JSON Data:

{"product1":[[243500000,17.85],[245500000,14.65],[248500000,16.22]]}

when I var_dump the decoded data it comes out as:

array(1) { ["product1"]=> array(3) { [0]=> array(2) { [0]=> int(243500000) [1]=> float(17.85) } [1]=> array(2) { [0]=> int(245500000) [1]=> float(14.65) } [2]=> array(2) { [0]=> int(248500000) [1]=> float(16.22) } } }

yet when I echo the product1 array it only shows:

Array

So my question is how do I access the data within the second Array. Then append the data from $new_item to the existing strings to be saved back to the JSON file. I've looked everywhere yet I can't find anyone with similar examples or errors.

Answer 1

You probably want to do

echo($data["product1"][0][0]);

instead, to get the first number out.

Answer 2

You can't call echo on an array, it will correctly just display Array.

If you want to access the data inside it, you can do something like:

echo $data['product1'][0][0] // echoes '243500000'

Answer 3

You need to use print_r() to display the entire array.

 print_r($data['product1']);