Add friendicaci/php-cs image

php-cs/Dockerfile

@@ -0,0 +1,9 @@
+FROM php:7.2
+
+RUN apt-get update -q && \
+    DEBIAN_FRONTEND=noninteractive apt-get install -q -y \
+        git \
+    && apt-get clean \
+    && rm -rf /tmp/* /var/tmp/* /var/lib/apt/lists/*
+
+COPY check-php-cs.sh /check-php-cs.sh

php-cs/check-php-cs.sh

@@ -0,0 +1,11 @@
+#!/bin/bash
+#
+# Checks the PHP CS syntax
+#
+if ! echo "${CHANGED_FILES}" | grep -qE "^(\\.php_cs(\\.dist)?|composer\\.lock)$"; then
+  EXTRA_ARGS=$(printf -- '--path-mode=intersection\n--\n%s' "${CHANGED_FILES}");
+else
+  EXTRA_ARGS='';
+fi
+
+./bin/dev/php-cs-fixer/vendor/bin/php-cs-fixer fix --config=.php_cs.dist -v --diff --diff-format=udiff --dry-run --using-cache=no ${EXTRA_ARGS}