Description:
------------
I checked that the file encoding character set for the php source file is UTF-8. So it means, I provide a real UTF-8 entry, and I don't need to use ut8_encode. 

It seems that accentuated caracters are truncated or not well managed while json-encoding a string.



Reproduce code:
---------------
<?php

setlocale(LC_ALL, "fr");
class CT {
  var $link;
  var $str;
  var $arr;

  function document() {
     $this->link = "http://www.neonira.com";
     $this->str = "cha?ne avec caract?res accentu?s ... ";
     $this->arr = array(1, 3, "lala", "123", array ( 'a', 'b', 'c'), 134);
  }
}

$c = new CT();
$c->document();
echo json_encode($c);

?>

Expected result:
----------------
shell>php ../php/ct.php
{"link":"http:\/\/www.neonira.com","str":"cha?ne avec caract?res accentu?s ... ","arr":[1,3,"lala","123",["a","b","c"],134]}shell>

Actual result:
--------------
shell>{107}php ../php/ct.php
{"link":"http:\/\/www.neonira.com","str":"cha","arr":[1,3,"lala","123",["a","b","c"],134]}shell>