Added PHP validators.

Added the PHPCS/WPCS validators to validate the
project is compliant to the coding standards.

Added shortcut scripts to composer for both Mac and Windows.

Author: hellofromtonya

composer.json

@@ -25,12 +25,27 @@
         "php": "^5.6|^7",
         "brain/monkey": "^2.2",
         "composer/installers": "^1.4",
-        "phpunit/phpunit": "~5.7.9"
+        "dealerdirect/phpcodesniffer-composer-installer": "^0.4.4",
+        "phpunit/phpunit": "~5.7.9",
+        "roave/security-advisories": "dev-master",
+        "sirbrillig/phpcs-variable-analysis": "^2.0",
+        "squizlabs/php_codesniffer": "^3.2",
+        "wimg/php-compatibility": "^8.0",
+        "wp-coding-standards/wpcs": "^0.14.1"
     },
     "config": {
         "sort-order": true
     },
     "scripts": {
+        "install-codestandards": [
+            "Dealerdirect\\Composer\\Plugin\\Installers\\PHPCodeSniffer\\Plugin::run"
+        ],
+        "phpcs-src": "\"vendor/bin/phpcs\"",
+        "phpcs-tests": "\"vendor/bin/phpcs\" --runtime-set testVersion 5.6 tests/php/",
+        "run-phpcs": [
+            "@phpcs-src",
+            "@phpcs-tests"
+        ],
         "test-unit": "\"vendor/bin/phpunit\" --testsuite unit --color=always",
         "test-integration": "\"vendor/bin/phpunit\" --testsuite integration --configuration tests/php/integration/phpunit.xml.dist --color=always",
         "run-tests": [

phpcs.xml.dist

@@ -0,0 +1,56 @@
+<?xml version="1.0"?>
+<ruleset name="GitContributing">
+    <description>The code standard for your plugin.</description>
+
+    <file>.</file>
+
+    <!-- Ignore these directories -->
+    <exclude-pattern>*/dist/*</exclude-pattern>
+    <exclude-pattern>node_modules/*</exclude-pattern>
+    <exclude-pattern>*/vendor/*</exclude-pattern>
+    <exclude-pattern>*/vendors/*</exclude-pattern>
+    <exclude-pattern>*/index.php</exclude-pattern>
+
+    <!-- PHP only. We'll use other validators for JS, CSS, etc. -->
+    <arg name="extensions" value="php"/>
+
+    <!-- Reporting Configuration -->
+    <arg name="colors" />
+    <arg value="sp"/>
+    <arg name="report" value="full"/>
+    <arg name="report" value="summary"/>
+    <arg name="report" value="source"/>
+
+    <!-- PHP Rules -->
+    <config name="testVersion" value="5.6-"/>
+
+    <!-- WordPress Rules -->
+    <rule ref="WordPress">
+        <exclude name="WordPress.VIP"/>
+    </rule>
+
+    <rule ref="WordPress.Files.FileName">
+        <properties>
+            <property name="strict_class_file_names" value="false"/>
+        </properties>
+        <exclude name="WordPress.Files.FileName.NotHyphenatedLowercase"/>
+    </rule>
+
+    <rule ref="WordPress.WhiteSpace.ControlStructureSpacing">
+        <properties>
+            <property name="blank_line_check" value="true" />
+        </properties>
+    </rule>
+
+    <rule ref="WordPress.WP.DeprecatedFunctions">
+        <properties>
+            <property name="minimum_supported_version" value="4.8" />
+        </properties>
+    </rule>
+
+    <rule ref="WordPress.WP.I18n">
+        <properties>
+            <property name="text_domain" type="array" value="git-contributing" />
+        </properties>
+    </rule>
+</ruleset>