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	PROJECT STATUS: CAVEAT EMPTOR

	This is an unstable preview release. I'm open sourcing some of Facebook's
	internal tools, but they'll be unstable for at least a couple months.
	-epriestley


	WHAT IS LIBPHUTIL?

	libphutil is a collection of utility classes and functions for PHP.

	Futures
	Futures (also known as "promises") are objects which act as placeholders for
	some future result of computation. They let you express parallel and
	asynchronous execution with a natural syntax. There are two provided concrete
	Future implementations:
	ExecFuture: execute system commands with a Future-based API
	HTTPFuture: execute simple HTTP requests with a Future-based API
	execx(): exception-based alternative to exec() with more capabilities

	Filesystem
	The builtin PHP filesystem functions return error codes and emit warnings.
	It is tedious to check these consistently. The Filesystem class provides a
	simple API for common filesystem operations that throws exceptions on failure.

	xsprintf
	This module allows you to build sprintf()-style functions that have arbitrary
	conversions. This is particularly useful for escaping data correctly. Three
	concrete implementations are provided:
	csprintf: safely escape data for system commands
	jsprintf: safely escape data for Javascript
	qsprintf: safely escape data for MySQL