Run phpstan in Travis

.travis.yml

@@ -11,10 +11,23 @@ matrix:
   fast_finish: true
 
 env:
+  global:
+    - RUN_PHPSTAN="FALSE"
   matrix:
     - PREFER_LOWEST=""
     - PREFER_LOWEST="--prefer-lowest"
 
+install:
+  - if [ $RUN_PHPSTAN == "TRUE" ]; then composer require --dev phpstan/phpstan:^0.12; fi
+
+matrix:
+  include:
+    - name: 'PHPStan'
+      php: 7.4
+      env:
+        - RUN_PHPSTAN="TRUE"
+  fast_finish: true
+
 services:
   - mysql
 
@@ -27,8 +40,9 @@ before_script:
   - composer update $PREFER_LOWEST
 
 script:
-  - find Core -name "*.php" | xargs -n1 php -l
-  - ./vendor/bin/sabre-cs-fixer fix . --dry-run --diff
+  - if [ $RUN_PHPSTAN == "FALSE" ]; then find Core -name "*.php" | xargs -n1 php -l; fi
+  - if [ $RUN_PHPSTAN == "FALSE" ]; then ./vendor/bin/sabre-cs-fixer fix . --dry-run --diff; fi
+  - if [ $RUN_PHPSTAN == "TRUE" ]; then php vendor/bin/phpstan.phar analyse Core html; fi
 
 cache:
   directories:

phpstan.neon

@@ -0,0 +1,6 @@
+parameters:
+  level: 0
+  excludes_analyse:
+    - Core/Frameworks/BaikalAdmin/Resources/GlyphiconsPro/generate-sprite.php
+    - Core/Resources/Web/BaikalAdmin/GlyphiconsPro/generate-sprite.php
+    - html/res/core/BaikalAdmin/GlyphiconsPro/generate-sprite.php