Modernising the PHP implementation

LICENSE

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-The contents of the Rx repository are copyright (C) 2008, Ricardo SIGNES.
+The contents of the Rx repository are released under the GNU General Public License
+
+* Copyright (C) 2019, J Ginsberg (./php)
+* Copyright (C) 2008, Ricardo SIGNES
 
 They may be distributed under the terms of the GNU General Public License,
 below.  The Perl implementation, Data::Rx, may also be distributed under the

php/.gitignore

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+vendor/**

php/README.md

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+# Shaggy8871\Rx
+
+[![Author](https://img.shields.io/badge/author-@shaggy8871-blue.svg?style=flat-square)](https://twitter.com/johnginsberg)
+[![Software License](https://img.shields.io/badge/license-GPL-brightgreen.svg?style=flat-square)](https://github.com/shaggy8871/Rx/blob/master/LICENSE)
+
+Based on https://github.com/rjbs/Rx with ideas from https://blog.picnic.nl/how-to-use-yaml-schema-to-validate-your-yaml-files-c82c049c2097
+
+Standalone PHP version is available at https://github.com/shaggy8871/php-rx
+
+## What is Rx?
+
+When adding an API to your web service, you have to choose how to encode the
+data you send across the line. XML is one common choice for this, but it can
+grow arcane and cumbersome pretty quickly. Lots of webservice authors want to
+avoid thinking about XML, and instead choose formats that provide a few simple
+data types that correspond to common data structures in modern programming
+languages. In other words, JSON and YAML.
+
+Unfortunately, while these formats make it easy to pass around complex data
+structures, they lack a system for validation. XML has XML Schemas and RELAX
+NG, but these are complicated and sometimes confusing standards. They're not
+very portable to the kind of data structure provided by JSON, and if you wanted
+to avoid XML as a data encoding, writing more XML to validate the first XML is
+probably even less appealing.
+
+Rx is meant to provide a system for data validation that matches up with
+JSON-style data structures and is as easy to work with as JSON itself.
+
+## Installation
+
+```
+composer require shaggy8871/php-rx
+```
+
+## Documentation
+
+[Check out the documentation](http://rx.codesimply.com/)
+
+## Usage
+
+* Create a schema file
+* Run `./vendor/bin/rx <yaml/json> <schema> ["<glob of custom types>"]`
+* Be sure to quote custom type glob!
+
+For example, `./vendor/bin/rx test.yml schema.yml "types/*.yml"`