Description:
------------
$product = json_decode('{"name":"Anton","1":"is not null"}');
print_r($product);
var_dump($product->name);
var_dump($product->{'1'});
$product = (array)$product;
print_r($product);
var_dump($product['name']);
var_dump($product['1']);

Test script:
---------------
<?php
$product = json_decode('{"name":"Anton","1":"is not null"}');
print_r($product);
var_dump($product->name);
var_dump($product->{'1'});
$product = (array)$product;
print_r($product);
var_dump($product['name']);
var_dump($product['1']);

Expected result:
----------------
stdClass Object
(
    [name] => Anton
    [1] => is not null
)
string(5) "Anton"
string(11) "is not null"
Array
(
    [name] => Anton
    [1] => is not null
)
string(5) "Anton"
string(11) "is not null"

Actual result:
--------------
stdClass Object
(
    [name] => Anton
    [1] => is not null
)
string(5) "Anton"
string(11) "is not null"
Array
(
    [name] => Anton
    [1] => is not null
)
string(5) "Anton"
NULL