apply code static analysis check with phpstan

.github/workflows/static-analysis-check.yml

@@ -0,0 +1,33 @@
+name: "Static Analysis Check"
+
+on:
+  pull_request:
+  push:
+    branches:
+      - 'master'
+    paths:
+      - 'app'
+      - 'system'
+
+jobs:
+  build:
+    name: PHP ${{ matrix.php-versions }}
+    runs-on: ubuntu-latest
+    strategy:
+      fail-fast: false
+      matrix:
+        php-versions: ['7.4']
+    steps:
+      - name: Setup PHP Action
+        uses: shivammathur/setup-php@1.8.2
+        with:
+          extensions: intl
+          php-version: "${{ matrix.php-versions }}"
+      - name: Checkout
+        uses: actions/checkout@v2
+      - name: "Install dependencies"
+        run: "composer install"
+      - name: "CS Check app"
+        run: "vendor/bin/phpstan analyze --level=0 app"
+      - name: "CS Check app"
+        run: "vendor/bin/phpstan analyze --level=0 system"

composer.json

@@ -20,7 +20,8 @@
 		"mikey179/vfsstream": "1.6.*",
 		"phpunit/phpunit": "^8.5",
 		"predis/predis": "^1.1",
-		"squizlabs/php_codesniffer": "^3.3"
+		"squizlabs/php_codesniffer": "^3.3",
+		"phpstan/phpstan": "^0.12.37"
 	},
 	"autoload": {
 		"psr-4": {

phpstan.neon

@@ -0,0 +1,12 @@
+includes:
+        - vendor/phpstan/phpstan/conf/bleedingEdge.neon
+
+parameters:
+    bootstrapFiles:
+        - qa-bootstrap.php
+    inferPrivatePropertyTypeFromConstructor: true
+    checkMissingIterableValueType: false
+    excludes_analyse:
+        - app/Config/*
+        - app/Database/*
+        - app/Views/*

qa-bootstrap.php

@@ -0,0 +1,5 @@
+<?php
+
+require 'app/Config/Paths.php';
+$paths = new Config\Paths();
+require_once 'system/bootstrap.php';