{"requests":[{"test":"1"},{"best":"2"}], "token_auth": "anonymous"}

<?php
require_once 'libs/upgradephp/upgrade.php';

$json = file_get_contents("data.json");
$result = _json_decode($json, TRUE);

var_dump($result);

$ php test.php 
array(2) {
  'requests' =>
  array(2) {
    [0] =>
    class stdClass#1 (1) {
      public $test =>
      string(1) "1"
    }
    [1] =>
    class stdClass#2 (1) {
      public $best =>
      string(1) "2"
    }
  }
  'token_auth' =>
  string(9) "anonymous"
}

array(2) {
  'requests' =>
  array(2) {
    [0] =>
    array(1) {
      'test' =>
      string(1) "1"
    }
    [1] =>
    array(1) {
      'best' =>
      string(1) "2"
    }
  }
  'token_auth' =>
  string(9) "anonymous"
}