Add code style & linting rules for PHP

This is based on Mediawiki boilerplate composer.json & phpcs.xml.
This adds a Makefile too.

To setup:

  $ make install-dev
  $ make lint
  $ make cs

Makefile

@@ -0,0 +1,21 @@
+
+
+install-dev:
+	composer install
+
+test: lint cs
+
+lint: phplint
+
+cs: phpcs
+
+phplint:
+	./vendor/bin/parallel-lint --exclude vendor/ .
+
+phpcs:
+	./vendor/bin/phpcs -p --colors .
+
+phpcsfix:
+	./vendor/bin/phpcbf .
+
+.PHONY: test lint cs phpcs phplint phpcsfix

composer.json

@@ -0,0 +1,13 @@
+{
+	"require-dev": {
+		"jakub-onderka/php-parallel-lint": "0.9.2",
+		"mediawiki/mediawiki-codesniffer": "0.7.2"
+	},
+	"scripts": {
+		"fix": "phpcbf",
+		"test": [
+			"parallel-lint . --exclude vendor",
+			"phpcs -p -s"
+		]
+	}
+}

phpcs.xml

@@ -0,0 +1,9 @@
+<?xml version="1.0"?>
+<ruleset>
+	<rule ref="vendor/mediawiki/mediawiki-codesniffer/MediaWiki"/>
+	<file>.</file>
+	<arg name="extensions" value="php,php5,inc"/>
+	<arg name="encoding" value="utf8"/>
+	<exclude-pattern>vendor/</exclude-pattern>
+        <exclude-pattern>pchart/</exclude-pattern>
+</ruleset>