Description:
------------
I'm attempting to use json_decode on a relatively long piece of JSON. The JSON 
is returned successfully by file_get_contents, and is valid according to 
JSONLint.

What I expect to happen is for the JSON to be correctly decoded, or NULL to be 
returned and json_last_error to be populated with the reason. For some reason 
NULL is returned and json_last_error remains at 0.

I have a feeling that this could be to do with the length of the file 
(containing a large array of objects).

I'm currently using:

ross@ross-laptop:/$ php -v

PHP 5.3.2-1ubuntu4.2 with Suhosin-Patch (cli) (built: May 13 2010 20:01:00) 
Copyright (c) 1997-2009 The PHP Group
Zend Engine v2.3.0, Copyright (c) 1998-2010 Zend Technologies

Test script:
---------------
<?php
$raw = file_get_contents("http://api.steampowered.com/ISteamUserStats/GetGlobalAchievementPercentagesForApp/v0001/?gameid=440");

$decoded = json_decode($raw);

$errors = array(
    JSON_ERROR_NONE => "No error has occurred",
    JSON_ERROR_DEPTH => "The maximum stack depth has been exceeded",
    JSON_ERROR_CTRL_CHAR => "Control character error, possibly incorrectly encoded",    
    JSON_ERROR_SYNTAX => "Syntax error",
    //JSON_ERROR_UTF8 => "Malformed UTF-8 characters, possibly incorrectly encoded"
);

var_dump("Raw result:", $raw, "\n\n");
var_dump("Decoded result:", $decoded, "\n\n");
var_dump("JSON errors:", $errors[json_last_error()]);

Expected result:
----------------
Raw result: (long raw json)
Decoded result: object stdClass(1) { (data array) }
JSON errors: string "No error has occurred"

Actual result:
--------------
Raw result: (long raw json)
Decoded result: NULL
JSON errors: string "No error has occurred"