Add github action for static analysis code

.github/workflows/static-analysis.yml

@@ -0,0 +1,87 @@
+name: "Static analysis code"
+
+on:
+  - push
+  - pull_request
+
+env:
+  COMPOSER_FLAGS: "--ansi --prefer-dist --no-interaction --no-progress"
+
+jobs:
+
+  ## PHP linter
+  linter:
+    name: "Check syntax errors"
+
+    runs-on: ubuntu-latest
+
+    strategy:
+      matrix:
+        php-version:
+          - "7.2"
+          - "7.3"
+          - "7.4"
+
+    steps:
+      - name: "Checkout"
+        uses: "actions/checkout@v2"
+
+      - name: "Install PHP"
+        uses: "shivammathur/setup-php@v2"
+        with:
+          coverage: "none"
+          php-version: ${{ matrix.php-version }}
+
+      - name: "Lint PHP files"
+        run: find ./src -type f -name '*.php' -print0 | xargs -0 -L1 -P4 -- php -l -f
+
+  ## PHPSTAN
+  phpstan:
+    name: "PHP Static Analysis"
+
+    runs-on: ubuntu-latest
+
+    strategy:
+      matrix:
+        php-version:
+          - "7.2"
+          - "7.3"
+          - "7.4"
+    steps:
+      - name: "Cancel Previous Runs"
+        uses: styfle/cancel-workflow-action@0.9.0
+        with:
+          all_but_latest: true
+          access_token: ${{ github.token }}
+
+      - name: "Checkout"
+        uses: "actions/checkout@v2"
+
+      - name: "Install PHP"
+        uses: "shivammathur/setup-php@v2"
+        with:
+          coverage: "none"
+          php-version: ${{ matrix.php-version }}
+
+      - name: "Setup github auth token for composer"
+        run: composer config github-oauth.github.com ${{ github.token }}
+
+      - name: "Get composer cache directory"
+        id: composer-cache
+        run: echo "::set-output name=dir::$(composer config cache-files-dir)"
+
+      - name: "Cache Composer Directory"
+        uses: actions/cache@v2
+        with:
+          path: ${{ steps.composer-cache.outputs.dir }}
+          key: ${{ runner.os }}-composer-${{ hashFiles('**/composer.lock') }}
+          restore-keys: ${{ runner.os }}-composer-
+
+      - name: "Composer Install"
+        run: |
+          composer install ${{ env.COMPOSER_FLAGS }}
+          rm composer.lock
+          composer config platform.php ${{ matrix.php }}
+
+      - name: Run phpstan
+        run: composer phpstan