PHP's WDDX is useful only for exchanging data between PHP applications, but definetly not for exchanging data between different languages (which actually defeats the purpose of WDDX).
For example:
$hash1 = array ("2" => "Two", "4" => "Four", "5" => "Five");
$hash2 = array ("0" => "Zero", "1" => "One", "2" => "Two");
$hash1 will be serialized as hash, but
$hash2 will be serialized as array/list, because the key happen to be a sequence starting from 0.
Unless the library provide a way for users to specify the type, it can never be used for cross-platform data exchange.
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