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Bug #51947 json_encode fails to decode non-breaking spaces
Submitted: 2010-05-29 01:24 UTC Modified: 2010-05-31 05:08 UTC
From: ehsan dot akhgari at gmail dot com Assigned:
Status: Not a bug Package: JSON related
PHP Version: 5.3.2 OS: Windows, Linux
Private report: No CVE-ID: None
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 [2010-05-29 01:24 UTC] ehsan dot akhgari at gmail dot com 
Description:
------------
I've seen that json_encode cannot encode a non-breaking space character, and returns "null".  I've reproduced this on php5.3.2 on Windows and Linux.

Test script:
---------------
<?php

var_dump(json_encode(chr(160)));

?>

Expected result:
----------------
string(3) "" ""

Actual result:
--------------
string(4) "null"

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 [2010-05-29 09:46 UTC] arpad dot borsos at googlemail dot com 
I have an outdated 5.2.4 on my server which returns an empty string instead of null in that case.

Anyway, 0xa0 (160) is not a valid utf8 character (it needs to be 0xc2 0xa0) and thus invalid json. I believe PHP is right about erroring out in this case.

var_dump(json_encode(utf8_encode(chr(0xa0))));

and

$encutf8 = json_encode(chr(0xc2).chr(0xa0));
var_dump($encutf8);

both work fine.

Can you check the output of json_last_error() please?
 [2010-05-31 05:08 UTC] aharvey@php.net
-Status: Open +Status: Bogus
 [2010-05-31 05:08 UTC] aharvey@php.net 
This is expected behaviour: as Arpad says, json_encode() expects input to be encoded in UTF-8. json_encode(utf8_encode(chr(160))) behaves as you'd expect: you get "\u00a0" as the result.
 
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