<?
$arr = array("hello"=>"there", "i'm" => 30);

foreach ($arr as $name => $value)
  echo("name: $name, value: $value<br>\n");

$packet = wddx_serialize_vars("arr");
echo(htmlentities($packet) . "<br>\n");
$newarr = wddx_deserialize($packet);
echo("newarr: $newarr<br>\n");

foreach ($newarr["arr"] as $name => $value)
  echo("name: $name, value: $value<br>\n");
?>

result is this:
> name: hello, value: there
> name: i'm, value: 30
> <wddxPacket version='1.0'><header/><data><struct><var name='arr'><struct><var > name='hello'><string>there</string></var><var
> name='i'm'><number>30</number></var></struct></var></struct></data></wddxPacket>
> newarr: 
> 
> Result:
> Warning: Invalid argument supplied for foreach() in whatever.php on line 12

Changing 'i'm' on line 2 to 'i am' solves the "crash".
Maybe the ' char should have to be mapped to \' or something else... I dunno. Just wanted to let you know...

PHP ROCKS!
-Gin