Static analysis with PHPStan

.travis.yml

@@ -36,6 +36,12 @@ matrix:
     - php: 7.0
       env: PHPCS=1 DEFAULT=0
 
+    - php: 7.0
+      env: PHPSTAN=1 DEFAULT=0
+
+    - php: 7.1
+      env: PHPSTAN=1 DEFAULT=0
+
     - php: hhvm
       env: HHVM=1 DB=sqlite db_dsn='sqlite:///:memory:'
 
@@ -44,6 +50,10 @@ matrix:
 
   allow_failures:
     - php: hhvm
+    - php: 7.0
+      env: PHPSTAN=1 DEFAULT=0
+    - php: 7.1
+      env: PHPSTAN=1 DEFAULT=0
 
 before_install:
   - if [ $HHVM != 1 && $TRAVIS_PHP_VERSION != 7.* ]; then phpenv config-rm xdebug.ini; fi
@@ -78,6 +88,7 @@ script:
   - if [[ $DEFAULT = 1 && $TRAVIS_PHP_VERSION != 7.0 ]]; then vendor/bin/phpunit; fi
 
   - if [[ $PHPCS = 1 ]]; then vendor/bin/phpcs -p --extensions=php --standard=vendor/cakephp/cakephp-codesniffer/CakePHP ./src ./tests; fi
+  - if [[ $PHPSTAN = 1 ]]; then composer require --dev phpstan/phpstan:dev-master && vendor/bin/phpstan analyse -c phpstan.neon -l 0 src; fi
 
 after_success:
   - if [[ $DEFAULT = 1 && $TRAVIS_PHP_VERSION = 7.0 ]]; then bash <(curl -s https://codecov.io/bash); fi

phpstan.neon

@@ -0,0 +1,3 @@
+parameters:
+	autoload_files:
+		- %rootDir%/../../../src/basics.php