Description:
------------
wddx_add_vars() correctly converts values to UTF-8, but doesn't convert var names to UTF-8, so wddx_deserialize() return an empty array as XML packet contains var names with accent.

below is a script showing that string values are converted to UTF-8 by wddx_add_vars, but var names are not converted. It also show that wddx_deserialize() works fine when input packet contains UTF_8 encoded var names manually, but doesn't work when var names are let accentuated by wddx_add_vars().

Could you please, modify wddx_add_vars, to UTF_8 encode var names as already done for string values ?

Thank for your help.


Reproduce code:
---------------
<?php
 
// If varname is ascii, unserialize is OK //
$packet_id = wddx_packet_start("PHP");
$varname = "value ?";
      wddx_add_vars($packet_id,"varname");
      $packet = wddx_packet_end($packet_id);
var_dump ($packet);
echo "\n\n";
$result = wddx_deserialize($packet);
var_dump ($result);

// If varname is non_ascii, unserialize return array(0) {} //
$packet_id = wddx_packet_start("PHP");
$varname? = "value ?";
      wddx_add_vars($packet_id,"varname?");
      $packet = wddx_packet_end($packet_id);
var_dump ($packet);
$result = wddx_deserialize($packet);
var_dump ($result);

// If packet contains non_ascii UTF-8 encoded varname, unserialize is OK //
$packet = "<wddxPacket version='1.0'><header><comment>PHP</comment></header><data><struct><var name='varnameé'><string>value é</string></var></struct></data></wddxPacket>";
var_dump ($packet);
$result = wddx_deserialize($packet);
var_dump ($result);

?>

Expected result:
----------------
string(159) "value é"
array(1) { ["varname"]=> string(7) "value ?" }
string(160) "value é"
array(1) { ["varname?"]=> string(7) "value ?" }
string(161) "value é"
array(1) { ["varname?"]=> string(7) "value ?" }

Actual result:
--------------
string(159) "value é"
array(1) { ["varname"]=> string(7) "value ?" }
string(160) "value é"
array(0) { }
string(161) "value é"
array(1) { ["varname?"]=> string(7) "value ?" }