Description:
------------
I'm trying the json_decode() function on real world strings, not just from strings 
produced using json_encode().

I have included the test case from bug #52262 as well to show that this issue is 
different.

Thanks.

Test script:
---------------
<pre>
<?php

/* Settings */

/* from http://dealerservices.autotrader.co.uk/14184/cars.htm */
$urls[]='http://atsearch.autotrader.co.uk/js/uvl/InlineServlet.js?did=14184&configfile=http://dealerservices.autotrader.co.uk/dealers/14184/14184_config.xml&csslocation=http://dealerservices.autotrader.co.uk/dealers/14184/14184&dropdowntype=uvl&partner=TMG&postcode=me86ad&miles=1500&sort=5&action=searchresults';
/* from http://api.jquery.com/jQuery.getJSON/ */
$urls[]='http://api.flickr.com/services/feeds/photos_public.gne?jsoncallback=jQuery15094986786483787_1297190250272&tags=cat&tagmode=any&format=json&_=1297190250280';
/* from http://code.google.com/apis/base/samples/javascript/tutorial.html */
$urls[]='http://www.google.com/base/feeds/attributes/-/vehicles?max-values=30&bq=[target%20country:GB]&alt=json-in-script&callback=showMake';
/* from http://code.google.com/apis/gdata/docs/json.html */
$urls[]='http://www.google.com/calendar/feeds/developer-calendar@google.com/public/full?alt=json';
/* from http://code.google.com/apis/gdata/docs/json.html */
$urls[]='http://www.google.com/calendar/feeds/developer-calendar@google.com/public/full?alt=json-in-script&callback=myFunction';
/* from http://bugs.php.net/bug.php?id=52262 */
$urls[]='http://api.steampowered.com/ISteamUserStats/GetGlobalAchievementPercentagesForApp/v0001/?gameid=440';

/* from http://php.net/manual/en/function.json-last-error.php */
$json_errors=array( -1 => 'An unknown error occured',
										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_STATE_MISMATCH => 'Invalid or malformed JSON',
										JSON_ERROR_SYNTAX => 'Syntax error',
										JSON_ERROR_UTF8 => 'Malformed UTF-8 characters, possibly incorrectly encoded');

/* main loop */
foreach($urls as $url) {
	echo PHP_EOL;

	//call the json
	$json=file_get_contents($url);
	echo 'Decoding... ' . $url . PHP_EOL;

	//convert from jsonp to json
	$json=preg_replace('/.+?({.+}).+/','$1',$json);

	//get a result
	$result=json_decode($json);
	if ($result) {
		echo 'Decoded.';
	} else {
	  echo 'Failed to decode.';
	}
	echo PHP_EOL;

	$err=json_last_error();
	if ($err != JSON_ERROR_NONE) {
		echo 'Error: ';
		echo isset($json_errors[$err])?$json_errors[$err]:$json_errors[-1];
	} else {
		echo 'No error.';
	}
	echo PHP_EOL;
}

//eof

Expected result:
----------------
The first result should either:

* Decode successfully and have no error (preferable)
Or
* Fail to decode and have an error which explains why

Actual result:
--------------

Decoding... http://atsearch.autotrader.co.uk/js/uvl/InlineServlet.js?
did=14184&configfile=http://dealerservices.autotrader.co.uk/dealers/14184/14184_
config.xml&csslocation=http://dealerservices.autotrader.co.uk/dealers/14184/1418
4&dropdowntype=uvl&partner=TMG&postcode=me86ad&miles=1500&sort=5&action=searchre
sults
Failed to decode.
No error.

Decoding... http://api.flickr.com/services/feeds/photos_public.gne?
jsoncallback=jQuery15094986786483787_1297190250272&tags=cat&tagmode=any&format=j
son&_=1297190250280
Failed to decode.
Error: Syntax error

Decoding... http://www.google.com/base/feeds/attributes/-/vehicles?max-
values=30&bq=[target%20country:GB]&alt=json-in-script&callback=showMake
Decoded.
No error.

Decoding... http://www.google.com/calendar/feeds/developer-
calendar@google.com/public/full?alt=json
Decoded.
No error.

Decoding... http://www.google.com/calendar/feeds/developer-
calendar@google.com/public/full?alt=json-in-script&callback=myFunction
Decoded.
No error.

Decoding... 
http://api.steampowered.com/ISteamUserStats/GetGlobalAchievementPercentagesForAp
p/v0001/?gameid=440
Decoded.
No error.