simplexml_load_string
Introduction
XML Manipulation
PHP Manual

# WDDX

- Introduction
- Installing/Configuring
  - Installation
  - Runtime Configuration
  - Resource Types
- Predefined Constants
- Examples
- WDDX Functions
  - wddx_add_vars — Add variables to a WDDX packet with the specified ID
  - wddx_deserialize — Alias of wddx_unserialize
  - wddx_packet_end — Ends a WDDX packet with the specified ID
  - wddx_packet_start — Starts a new WDDX packet with structure inside it
  - wddx_serialize_value — Serialize a single value into a WDDX packet
  - wddx_serialize_vars — Serialize variables into a WDDX packet
  - wddx_unserialize — Unserializes a WDDX packet

simplexml_load_string
Introduction
XML Manipulation
PHP Manual