# WDDX

&reftitle.intro;

This extension is DEPRECATED and UNBUNDLED as of PHP 7.4.0.

These functions are intended for work with WDDX.

Do not pass untrusted user input to `wddx_deserialize`. Unserialization can result in code being loaded and executed due to object instantiation and autoloading, and a malicious user may be able to exploit this. Use a safe, standard data interchange format such as JSON (via `json_decode` and `json_encode`) if you need to pass serialized data to the user.

&reference.wddx.setup; &reference.wddx.constants; &reference.wddx.examples; &reference.wddx.reference;