diff --git a/.editorconfig b/.editorconfig
new file mode 100644
index 0000000..26a8eb6
--- /dev/null
+++ b/.editorconfig
@@ -0,0 +1,16 @@
+; top-most EditorConfig file
+root = true
+
+; Unix-style newlines
+[*]
+charset = utf-8
+end_of_line = LF
+insert_final_newline = true
+trim_trailing_whitespace = true
+
+[*.{php,html,twig}]
+indent_style = space
+indent_size = 4
+
+[*.md]
+max_line_length = 80
diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index e5bf6b5..9a3ad52 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -61,3 +61,4 @@ jobs:
 
       - name: Run tests
         run: make test-lowest
+
diff --git a/.php-cs-fixer.php b/.php-cs-fixer.php
new file mode 100644
index 0000000..e914a6a
--- /dev/null
+++ b/.php-cs-fixer.php
@@ -0,0 +1,24 @@
+<?php
+
+if (!file_exists(__DIR__.'/src')) {
+    exit(0);
+}
+
+return (new PhpCsFixer\Config())
+    ->setRules([
+        '@PHP71Migration' => true,
+        '@PHPUnit75Migration:risky' => true,
+        '@Symfony' => true,
+        '@Symfony:risky' => true,
+        'protected_to_private' => false,
+        'nullable_type_declaration_for_default_null_value' => ['use_nullable_type_declaration' => false],
+    ])
+    ->setRiskyAllowed(true)
+    ->setFinder(
+        (new PhpCsFixer\Finder())
+            ->in(__DIR__.'/src')
+            ->notPath('#/Fixtures/#')
+            ->in(__DIR__.'/tests')
+            ->append([__FILE__])
+    )
+;
diff --git a/Makefile b/Makefile
index fb79a3c..c1b2c80 100644
--- a/Makefile
+++ b/Makefile
@@ -18,3 +18,6 @@ test-php73-lowest:
 
 test-php74-lowest:
 	docker run --rm -v $(DIR):/project -w /project webdevops/php:7.4 $(MAKE) test-lowest
+
+cs:
+	docker run --rm -v $(DIR):/project -w /project jakzal/phpqa php-cs-fixer fix
diff --git a/README.md b/README.md
index a14b3f2..5f14933 100644
--- a/README.md
+++ b/README.md
@@ -1,17 +1,36 @@
 Getting Started With BreadcrumbTrailBundle
 ==========================================
 
-This bundle provides a breacrumb trail service also known as breadcrumbs or Fil d'Ariane.  
-Breadcrumbs can be defined with annotations, PHP and Twig.
+This bundle provides a breadcrumb trail service also known as breadcrumbs or Fil d'Ariane.
+Breadcrumbs can be defined with Attributes, annotations, PHP and Twig.
 
 ## Installation
 
 Please follow the steps given in [installation.md](src/Resources/doc/installation.md) to install this bundle.
 
-## Summary
+## Bundle documentation
 
- - [Annotation configuration](src/Resources/doc/annotation_configuration.md)
- - [PHP configuration](src/Resources/doc/php_configuration.md)
- - [Twig configuration](src/Resources/doc/twig_configuration.md)
- - [Render the breadcrumb trail](src/Resources/doc/rendering.md)
- - [Override the template](src/Resources/doc/override_template.md)
+- [Annotation configuration](src/Resources/doc/annotation_configuration.md)
+- [PHP configuration](src/Resources/doc/php_configuration.md)
+- [Twig configuration](src/Resources/doc/twig_configuration.md)
+- [Render the breadcrumb trail](src/Resources/doc/rendering.md)
+- [Override the template](src/Resources/doc/override_template.md)
+
+## Tests
+
+Several make targets can get used to run the PHPUnit test suite on different PHP environments:
+
+```
+$ make test
+$ make test-php73
+$ make test-php74-lowest
+```
+
+## Code style
+
+PHP-CS-Fixer is used to keep the code style in shape. There is a make target that uses Docker to fix
+the code style without having to install any other dependencies:
+
+```
+$ make cs
+```
diff --git a/src/Annotation/Breadcrumb.php b/src/Annotation/Breadcrumb.php
index bb4ac8e..562a917 100644
--- a/src/Annotation/Breadcrumb.php
+++ b/src/Annotation/Breadcrumb.php
@@ -30,15 +30,15 @@ class Breadcrumb
     /**
      * @var mixed An array of parameters for the route
      */
-    private $routeParameters = array();
+    private $routeParameters = [];
 
     /**
-     * @var Boolean Whether to generate an absolute URL
+     * @var bool Whether to generate an absolute URL
      */
     private $routeAbsolute = false;
 
     /**
-     * @var integer Position of the breadcrumb (default = 0)
+     * @var int Position of the breadcrumb (default = 0)
      */
     private $position = 0;
 
@@ -50,17 +50,17 @@ class Breadcrumb
     /**
      * @var mixed An array of additional attributes for the breadcrumb
      */
-    private $attributes = array();
+    private $attributes = [];
 
     /**
-     * @param array|string $title title, or the legacy array that contains all annotation data
+     * @param array|string                 $title           title, or the legacy array that contains all annotation data
      * @param ?array<string, string|array> $route
-     * @param ?string $routeName
-     * @param ?array<string,mixed> $routeParameters
-     * @param bool $routeAbsolute
-     * @param int $position
-     * @param ?string $template
-     * @param array $attributes
+     * @param ?string                      $routeName
+     * @param ?array<string,mixed>         $routeParameters
+     * @param bool                         $routeAbsolute
+     * @param int                          $position
+     * @param ?string                      $template
+     * @param array                        $attributes
      */
     public function __construct(
         $title,
@@ -70,13 +70,12 @@ public function __construct(
         $position = null,
         $template = null,
         $attributes = null
-    )
-    {
+    ) {
         $data = [];
 
-        if (is_string($title)) {
-            $data = ["title" => $title];
-        } elseif (is_array($title)) {
+        if (\is_string($title)) {
+            $data = ['title' => $title];
+        } elseif (\is_array($title)) {
             $data = $title;
         }
 
@@ -99,16 +98,15 @@ public function __construct(
         }
 
         if (isset($data['route'])) {
-            if (is_array($data['route'])) {
+            if (\is_array($data['route'])) {
                 foreach ($data['route'] as $key => $value) {
                     $method = 'setRoute'.$key;
                     if (!method_exists($this, $method)) {
-                        throw new \BadMethodCallException(sprintf("Unknown property '%s' for the 'route' parameter on annotation '%s'.", $key, get_class($this)));
+                        throw new \BadMethodCallException(sprintf("Unknown property '%s' for the 'route' parameter on annotation '%s'.", $key, static::class));
                     }
                     $this->$method($value);
                 }
-            }
-            else {
+            } else {
                 $data['routeName'] = $data['route'];
             }
 
@@ -116,15 +114,14 @@ public function __construct(
         }
 
         foreach ($data as $key => $value) {
-
             // Do not attempt setting values that were provided as null
-            if ($value === null) {
+            if (null === $value) {
                 continue;
             }
 
             $method = 'set'.$key;
             if (!method_exists($this, $method)) {
-                throw new \BadMethodCallException(sprintf("Unknown property '%s' on annotation '%s'.", $key, get_class($this)));
+                throw new \BadMethodCallException(sprintf("Unknown property '%s' on annotation '%s'.", $key, static::class));
             }
             $this->$method($value);
         }
@@ -146,7 +143,7 @@ public function getTitle()
     }
 
     /**
-     * Sets the name of the route
+     * Sets the name of the route.
      *
      * @param string $routeName The name of the route
      */
@@ -161,7 +158,7 @@ public function getRouteName()
     }
 
     /**
-     * Sets an array of parameters for the route
+     * Sets an array of parameters for the route.
      *
      * @param mixed $routeParameters An array of parameters for the route
      */
@@ -176,9 +173,9 @@ public function getRouteParameters()
     }
 
     /**
-     * Whether to generate an absolute URL
+     * Whether to generate an absolute URL.
      *
-     * @param Boolean $routeName Whether to generate an absolute URL
+     * @param bool $routeName Whether to generate an absolute URL
      */
     public function setRouteAbsolute($routeAbsolute)
     {
@@ -193,7 +190,7 @@ public function getRouteAbsolute()
     /**
      * Sets the position of the breadcrumb.
      *
-     * @param integer Position of the breadcrumb (default = 0)
+     * @param int Position of the breadcrumb (default = 0)
      */
     public function setPosition($position)
     {
@@ -208,7 +205,7 @@ public function getPosition()
     /**
      * Sets the template of the breadcrumb trail.
      *
-     * @param string Template of the breadcrumb trail.
+     * @param string template of the breadcrumb trail
      */
     public function setTemplate($template)
     {
@@ -223,7 +220,7 @@ public function getTemplate()
     /**
      * Sets the additional attributes for the breadcrumb.
      *
-     * @param mixed Additional attributes for the breadcrumb.
+     * @param mixed additional attributes for the breadcrumb
      */
     public function setAttributes($attributes)
     {
diff --git a/src/BreadcrumbTrail/Breadcrumb.php b/src/BreadcrumbTrail/Breadcrumb.php
index 83a544a..1400ea8 100644
--- a/src/BreadcrumbTrail/Breadcrumb.php
+++ b/src/BreadcrumbTrail/Breadcrumb.php
@@ -31,11 +31,11 @@ class Breadcrumb
     /**
      * Constructor.
      *
-     * @param string $title Title of the breadcrumb
-     * @param string $url Url of the breadcrumb
-     * @param mixed $attributes Additional attributes for the breadcrumb
+     * @param string $title      Title of the breadcrumb
+     * @param string $url        Url of the breadcrumb
+     * @param mixed  $attributes Additional attributes for the breadcrumb
      */
-    public function __construct($title, $url = null, $attributes = array())
+    public function __construct($title, $url = null, $attributes = [])
     {
         $this->title = $title;
         $this->url = $url;
diff --git a/src/BreadcrumbTrail/Trail.php b/src/BreadcrumbTrail/Trail.php
index 5b21295..ae2684a 100644
--- a/src/BreadcrumbTrail/Trail.php
+++ b/src/BreadcrumbTrail/Trail.php
@@ -59,72 +59,70 @@ public function getTemplate()
     }
 
     /**
-     * Add breadcrumb
+     * Add breadcrumb.
+     *
+     * @param mixed  $breadcrumb_or_title A Breadcrumb instance or the title of the breadcrumb
+     * @param string $routeName           The name of the route
+     * @param mixed  $routeParameters     An array of parameters for the route
+     * @param bool   $routeAbsolute       Whether to generate an absolute URL
+     * @param int    $position            Position of the breadcrumb (default = 0)
+     * @param mixed  $attributes          Additional attributes for the breadcrumb
      *
-     * @param mixed   $breadcrumb_or_title  A Breadcrumb instance or the title of the breadcrumb
-     * @param string  $routeName            The name of the route
-     * @param mixed   $routeParameters      An array of parameters for the route
-     * @param boolean $routeAbsolute        Whether to generate an absolute URL
-     * @param integer $position             Position of the breadcrumb (default = 0)
-     * @param mixed   $attributes           Additional attributes for the breadcrumb
      * @throws \RuntimeException
      * @throws \InvalidArgumentException
+     *
      * @return self
      */
-    public function add($breadcrumb_or_title, $routeName = null, $routeParameters = array(), $routeAbsolute = UrlGeneratorInterface::ABSOLUTE_PATH, $position = 0, $attributes = array())
+    public function add($breadcrumb_or_title, $routeName = null, $routeParameters = [], $routeAbsolute = UrlGeneratorInterface::ABSOLUTE_PATH, $position = 0, $attributes = [])
     {
-        if ($breadcrumb_or_title === null) {
+        if (null === $breadcrumb_or_title) {
             return $this->reset();
         }
 
         if ($breadcrumb_or_title instanceof Breadcrumb) {
             $breadcrumb = $breadcrumb_or_title;
         } else {
-            if (!is_string($breadcrumb_or_title)) {
+            if (!\is_string($breadcrumb_or_title)) {
                 throw new \InvalidArgumentException('The title of a breadcrumb must be a string.');
             }
 
             $request = $this->requestStack->getCurrentRequest();
 
-            if ($request !== null) {
-                preg_match_all('#\{(?P<variable>\w+).?(?P<function>([\w\.])*):?(?P<parameters>(\w|,| )*)\}#', $breadcrumb_or_title, $matches, PREG_OFFSET_CAPTURE | PREG_SET_ORDER);
+            if (null !== $request) {
+                preg_match_all('#\{(?P<variable>\w+).?(?P<function>([\w\.])*):?(?P<parameters>(\w|,| )*)\}#', $breadcrumb_or_title, $matches, \PREG_OFFSET_CAPTURE | \PREG_SET_ORDER);
 
                 foreach ($matches as $match) {
-                    $varName    = $match['variable'][0];
-                    $functions  = $match['function'][0] ? explode('.', $match['function'][0]) : array();
-                    $parameters = $match['parameters'][0] ? explode(',', $match['parameters'][0]) : array();
-                    $nbCalls    = count($functions);
+                    $varName = $match['variable'][0];
+                    $functions = $match['function'][0] ? explode('.', $match['function'][0]) : [];
+                    $parameters = $match['parameters'][0] ? explode(',', $match['parameters'][0]) : [];
+                    $nbCalls = \count($functions);
 
-                    if($request->attributes->has($varName)) {
+                    if ($request->attributes->has($varName)) {
                         $object = $request->attributes->get($varName);
 
-                        if(empty($functions)) {
+                        if (empty($functions)) {
                             $objectValue = (string) $object;
-                        }
-                        else {
-                            foreach ($functions AS $f => $function) {
-
-                                # While this is not the last function, call the chain
+                        } else {
+                            foreach ($functions as $f => $function) {
+                                // While this is not the last function, call the chain
                                 if ($f < $nbCalls - 1) {
-                                    if(is_callable(array($object, $fullFunctionName = 'get'.$function))
-                                        || is_callable(array($object, $fullFunctionName = 'has'.$function))
-                                        || is_callable(array($object, $fullFunctionName = 'is'.$function))) {
-                                        $object = call_user_func(array($object, $fullFunctionName));
-                                    }
-                                    else {
-                                        throw new \RuntimeException(sprintf('"%s" is not callable.', join('.', array_merge([$varName], $functions))));
+                                    if (\is_callable([$object, $fullFunctionName = 'get'.$function])
+                                        || \is_callable([$object, $fullFunctionName = 'has'.$function])
+                                        || \is_callable([$object, $fullFunctionName = 'is'.$function])) {
+                                        $object = \call_user_func([$object, $fullFunctionName]);
+                                    } else {
+                                        throw new \RuntimeException(sprintf('"%s" is not callable.', implode('.', array_merge([$varName], $functions))));
                                     }
                                 }
 
-                                # End of the chain: call the method
+                                // End of the chain: call the method
                                 else {
-                                    if(is_callable(array($object, $fullFunctionName = 'get'.$function))
-                                        || is_callable(array($object, $fullFunctionName = 'has'.$function))
-                                        || is_callable(array($object, $fullFunctionName = 'is'.$function))) {
-                                        $objectValue = call_user_func_array(array($object, $fullFunctionName),$parameters);
-                                    }
-                                    else {
-                                        throw new \RuntimeException(sprintf('"%s" is not callable.', join('.', array_merge([$varName], $functions))));
+                                    if (\is_callable([$object, $fullFunctionName = 'get'.$function])
+                                        || \is_callable([$object, $fullFunctionName = 'has'.$function])
+                                        || \is_callable([$object, $fullFunctionName = 'is'.$function])) {
+                                        $objectValue = \call_user_func_array([$object, $fullFunctionName], $parameters);
+                                    } else {
+                                        throw new \RuntimeException(sprintf('"%s" is not callable.', implode('.', array_merge([$varName], $functions))));
                                     }
                                 }
                             }
@@ -139,58 +137,49 @@ public function add($breadcrumb_or_title, $routeName = null, $routeParameters =
                         $routeParameters[$value] = $request->get($value);
                         unset($routeParameters[$key]);
                     } else {
-                        if (preg_match_all('#\{(?P<variable>\w+).?(?P<function>([\w\.])*):?(?P<parameters>(\w|,| )*)\}#', $value, $matches, PREG_OFFSET_CAPTURE | PREG_SET_ORDER)) {
-
-                            foreach ($matches AS $match) {
-
-                                $varName    = $match['variable'][0];
-                                $functions  = $match['function'][0] ? explode('.', $match['function'][0]) : array();
-                                $parameters = $match['parameters'][0] ? explode(',', $match['parameters'][0]) : array();
-                                $nbCalls    = count($functions);
+                        if (preg_match_all('#\{(?P<variable>\w+).?(?P<function>([\w\.])*):?(?P<parameters>(\w|,| )*)\}#', $value, $matches, \PREG_OFFSET_CAPTURE | \PREG_SET_ORDER)) {
+                            foreach ($matches as $match) {
+                                $varName = $match['variable'][0];
+                                $functions = $match['function'][0] ? explode('.', $match['function'][0]) : [];
+                                $parameters = $match['parameters'][0] ? explode(',', $match['parameters'][0]) : [];
+                                $nbCalls = \count($functions);
 
                                 if ($request->attributes->has($varName)) {
                                     $object = $request->attributes->get($varName);
 
                                     if (empty($functions)) {
                                         $objectValue = (string) $object;
-                                    }
-                                    else {
-                                        foreach ($functions AS $f => $function) {
-
-                                            # While this is not the last function, call the chain
+                                    } else {
+                                        foreach ($functions as $f => $function) {
+                                            // While this is not the last function, call the chain
                                             if ($f < $nbCalls - 1) {
-                                                if (is_callable(array($object, $fullFunctionName = 'get' . $function))
-                                                    || is_callable(array($object, $fullFunctionName  = 'has' . $function))
-                                                    || is_callable(array($object, $fullFunctionName  = 'is' . $function))
+                                                if (\is_callable([$object, $fullFunctionName = 'get'.$function])
+                                                    || \is_callable([$object, $fullFunctionName = 'has'.$function])
+                                                    || \is_callable([$object, $fullFunctionName = 'is'.$function])
                                                 ) {
-                                                    $object = call_user_func(array($object, $fullFunctionName));
-                                                }
-                                                else {
-                                                    throw new \RuntimeException(sprintf('"%s" is not callable.', join('.', array_merge([$varName], $functions))));
+                                                    $object = \call_user_func([$object, $fullFunctionName]);
+                                                } else {
+                                                    throw new \RuntimeException(sprintf('"%s" is not callable.', implode('.', array_merge([$varName], $functions))));
                                                 }
                                             }
 
-                                            # End of the chain: call the method
+                                            // End of the chain: call the method
                                             else {
-
-                                                if (is_callable(array($object, $fullFunctionName = 'get' . $function))
-                                                    || is_callable(array($object, $fullFunctionName  = 'has' . $function))
-                                                    || is_callable(array($object, $fullFunctionName  = 'is' . $function))
+                                                if (\is_callable([$object, $fullFunctionName = 'get'.$function])
+                                                    || \is_callable([$object, $fullFunctionName = 'has'.$function])
+                                                    || \is_callable([$object, $fullFunctionName = 'is'.$function])
                                                 ) {
-                                                    $objectValue = call_user_func_array(array($object, $fullFunctionName), $parameters);
-                                                }
-                                                else {
-                                                    throw new \RuntimeException(sprintf('"%s" is not callable.', join('.', array_merge([$varName], $functions))));
+                                                    $objectValue = \call_user_func_array([$object, $fullFunctionName], $parameters);
+                                                } else {
+                                                    throw new \RuntimeException(sprintf('"%s" is not callable.', implode('.', array_merge([$varName], $functions))));
                                                 }
                                             }
                                         }
                                     }
 
-                                    $routeParameter        = str_replace($match[0][0], $objectValue, $value);
+                                    $routeParameter = str_replace($match[0][0], $objectValue, $value);
                                     $routeParameters[$key] = $routeParameter;
                                 }
-
-
                             }
                         } elseif (preg_match('#^\{(?P<parameter>\w+)\}$#', $value, $matches)) {
                             $routeParameters[$key] = $request->get($matches['parameter']);
@@ -200,7 +189,7 @@ public function add($breadcrumb_or_title, $routeName = null, $routeParameters =
             }
 
             $url = null;
-            if ( !is_null($routeName) ) {
+            if (null !== $routeName) {
                 $referenceType = $routeAbsolute ? UrlGeneratorInterface::ABSOLUTE_URL : UrlGeneratorInterface::RELATIVE_PATH;
                 $url = $this->router->generate($routeName, $routeParameters, $referenceType);
             }
@@ -208,11 +197,11 @@ public function add($breadcrumb_or_title, $routeName = null, $routeParameters =
             $breadcrumb = new Breadcrumb($breadcrumb_or_title, $url, $attributes);
         }
 
-        if (!is_int($position)) {
+        if (!\is_int($position)) {
             throw new \InvalidArgumentException('The position of a breadcrumb must be an integer.');
         }
 
-        if ($position == 0 || $position > $this->breadcrumbs->count()) {
+        if (0 == $position || $position > $this->breadcrumbs->count()) {
             $this->breadcrumbs->attach($breadcrumb);
         } else {
             $this->insert($breadcrumb, $position);
@@ -226,7 +215,7 @@ private function insert($breadcrumb, $position)
         if ($position < 0) {
             $position += $this->breadcrumbs->count();
         } else { // $position >= 1
-            $position--;
+            --$position;
         }
 
         $breadcrumbs = new \SplObjectStorage();
@@ -245,7 +234,7 @@ private function insert($breadcrumb, $position)
     }
 
     /**
-     * Reset the trail
+     * Reset the trail.
      *
      * @return self
      */
diff --git a/src/DependencyInjection/APYBreadcrumbTrailExtension.php b/src/DependencyInjection/APYBreadcrumbTrailExtension.php
index 01f18d0..61c72c4 100644
--- a/src/DependencyInjection/APYBreadcrumbTrailExtension.php
+++ b/src/DependencyInjection/APYBreadcrumbTrailExtension.php
@@ -29,17 +29,18 @@ public function load(array $configs, ContainerBuilder $container)
 
         $container->setParameter('apy_breadcrumb_trail.template', $config['template']);
 
-        $loader = new XmlFileLoader($container, new FileLocator(__DIR__ . '/../Resources/config'));
+        $loader = new XmlFileLoader($container, new FileLocator(__DIR__.'/../Resources/config'));
         $loader->load('services.xml');
 
-        $this->deprecateService($container, "apy_breadcrumb_trail");
-        $this->deprecateService($container, "apy_breadcrumb_trail.annotation.listener");
+        $this->deprecateService($container, 'apy_breadcrumb_trail');
+        $this->deprecateService($container, 'apy_breadcrumb_trail.annotation.listener');
     }
 
-    private function deprecateService(ContainerBuilder $container, string $id) {
+    private function deprecateService(ContainerBuilder $container, string $id)
+    {
         $alias = $container->getAlias($id);
         if (Kernel::VERSION_ID >= 50100) {
-            $alias->setDeprecated('APY/BreadcrumbTrailBundle','1.7','The service is deprecated, use "%alias_id%" FQCN as service id instead.');
+            $alias->setDeprecated('APY/BreadcrumbTrailBundle', '1.7', 'The service is deprecated, use "%alias_id%" FQCN as service id instead.');
         } elseif (Kernel::VERSION_ID >= 40300) {
             $alias->setDeprecated();
         }
diff --git a/src/EventListener/BreadcrumbListener.php b/src/EventListener/BreadcrumbListener.php
index 7bad2ae..a2649ef 100644
--- a/src/EventListener/BreadcrumbListener.php
+++ b/src/EventListener/BreadcrumbListener.php
@@ -11,10 +11,10 @@
 
 namespace APY\BreadcrumbTrailBundle\EventListener;
 
+use APY\BreadcrumbTrailBundle\Annotation\Breadcrumb;
+use APY\BreadcrumbTrailBundle\BreadcrumbTrail\Trail;
 use APY\BreadcrumbTrailBundle\MixedAnnotationWithAttributeBreadcrumbsException;
 use Doctrine\Common\Annotations\Reader;
-use APY\BreadcrumbTrailBundle\BreadcrumbTrail\Trail;
-use APY\BreadcrumbTrailBundle\Annotation\Breadcrumb;
 use Symfony\Component\HttpKernel\Event\KernelEvent;
 use Symfony\Component\HttpKernel\HttpKernelInterface;
 
@@ -26,7 +26,6 @@ class BreadcrumbListener
     protected $reader;
 
     /**
-     *
      * @var Trail An Trail instance
      */
     protected $breadcrumbTrail;
@@ -34,8 +33,8 @@ class BreadcrumbListener
     /**
      * Constructor.
      *
-     * @param Reader $reader An Reader instance
-     * @param Trail $breadcrumbTrail An Trail instance
+     * @param Reader $reader          An Reader instance
+     * @param Trail  $breadcrumbTrail An Trail instance
      */
     public function __construct(Reader $reader, Trail $breadcrumbTrail)
     {
@@ -44,11 +43,11 @@ public function __construct(Reader $reader, Trail $breadcrumbTrail)
     }
 
     /**
-     * @param \Symfony\Component\HttpKernel\Event\FilterControllerEvent|\Symfony\Component\HttpKernel\Event\ControllerEvent  $event
+     * @param \Symfony\Component\HttpKernel\Event\FilterControllerEvent|\Symfony\Component\HttpKernel\Event\ControllerEvent $event
      */
     public function onKernelController(KernelEvent $event)
     {
-        if (!is_array($controller = $event->getController())) {
+        if (!\is_array($controller = $event->getController())) {
             return;
         }
 
@@ -64,18 +63,18 @@ public function onKernelController(KernelEvent $event)
             throw new \InvalidArgumentException(sprintf('Annotations from class "%s" cannot be read as it is abstract.', $class));
         }
 
-        if ($event->getRequestType() == HttpKernelInterface::MASTER_REQUEST) {
+        if (HttpKernelInterface::MASTER_REQUEST == $event->getRequestType()) {
             $this->breadcrumbTrail->reset();
 
             // Annotations from class
             $classBreadcrumbs = $this->reader->getClassAnnotations($class);
             if ($this->supportsLoadingAttributes()) {
                 $classAttributeBreadcrumbs = $this->getAttributes($class);
-                if (count($classBreadcrumbs) > 0) {
+                if (\count($classBreadcrumbs) > 0) {
                     trigger_deprecation('apy/breadcrumb-bundle', '1.7', 'Please replace the annotations in "%s" with attributes. Adding Breadcrumbs via annotations is deprecated and will be removed in v2.0, but luckily your platform supports using Attributes.', $class->name);
                 }
-                if (count($classAttributeBreadcrumbs) > 0) {
-                    if (count($classBreadcrumbs) > 0) {
+                if (\count($classAttributeBreadcrumbs) > 0) {
+                    if (\count($classBreadcrumbs) > 0) {
                         throw MixedAnnotationWithAttributeBreadcrumbsException::forClass($class->name);
                     }
                     $classBreadcrumbs = $classAttributeBreadcrumbs;
@@ -88,11 +87,11 @@ public function onKernelController(KernelEvent $event)
             $methodBreadcrumbs = $this->reader->getMethodAnnotations($method);
             if ($this->supportsLoadingAttributes()) {
                 $methodAttributeBreadcrumbs = $this->getAttributes($method);
-                if (count($methodBreadcrumbs) > 0) {
+                if (\count($methodBreadcrumbs) > 0) {
                     trigger_deprecation('apy/breadcrumb-bundle', '1.7', 'Please replace the annotations in "%s" with attributes. Adding Breadcrumbs via annotations is deprecated and will be removed in v2.0, but luckily your platform supports using Attributes.', $class->name.'::'.$method->name);
                 }
-                if (count($methodAttributeBreadcrumbs) > 0) {
-                    if (count($methodBreadcrumbs) > 0) {
+                if (\count($methodAttributeBreadcrumbs) > 0) {
+                    if (\count($methodBreadcrumbs) > 0) {
                         throw MixedAnnotationWithAttributeBreadcrumbsException::forClassMethod($class->name, $method->name);
                     }
                     $methodBreadcrumbs = $methodAttributeBreadcrumbs;
@@ -113,9 +112,9 @@ private function addBreadcrumbsToTrail(array $annotations)
                 $template = $annotation->getTemplate();
                 $title = $annotation->getTitle();
 
-                if ($template != null) {
+                if (null != $template) {
                     $this->breadcrumbTrail->setTemplate($template);
-                    if ($title === null) {
+                    if (null === $title) {
                         continue;
                     }
                 }
@@ -148,11 +147,12 @@ private function supportsLoadingAttributes(): bool
 
     /**
      * @param \ReflectionClass|\ReflectionMethod $reflected
+     *
      * @return array<Breadcrumb>
      */
     private function getAttributes($reflected): array
     {
-        if ($this->supportsLoadingAttributes() === false) {
+        if (false === $this->supportsLoadingAttributes()) {
             throw new \RuntimeException('Detected an attempt on getting attributes while your version of PHP does not support this.');
         }
 
diff --git a/src/MixedAnnotationWithAttributeBreadcrumbsException.php b/src/MixedAnnotationWithAttributeBreadcrumbsException.php
index 35863ea..671718c 100644
--- a/src/MixedAnnotationWithAttributeBreadcrumbsException.php
+++ b/src/MixedAnnotationWithAttributeBreadcrumbsException.php
@@ -2,7 +2,6 @@
 
 namespace APY\BreadcrumbTrailBundle;
 
-
 class MixedAnnotationWithAttributeBreadcrumbsException extends \LogicException
 {
     private function __construct(string $class, string $method = null)
@@ -11,7 +10,7 @@ private function __construct(string $class, string $method = null)
         if ($method) {
             $target .= "::$method()";
         } else {
-            $target .= "::class";
+            $target .= '::class';
         }
 
         parent::__construct("A mix of Breadcrumb attributes and annotations is not allowed. Please upgrade all annotations on class `{$target}` to attributes.");
diff --git a/src/Twig/BreadcrumbTrailExtension.php b/src/Twig/BreadcrumbTrailExtension.php
index 7018f0a..0ccdda3 100644
--- a/src/Twig/BreadcrumbTrailExtension.php
+++ b/src/Twig/BreadcrumbTrailExtension.php
@@ -17,18 +17,15 @@
 use Twig\TwigFunction;
 
 /**
- * Provides an extension for Twig to output breadcrumbs
+ * Provides an extension for Twig to output breadcrumbs.
  */
 class BreadcrumbTrailExtension extends AbstractExtension
 {
     private $trail;
     private $templating;
 
-
     /**
      * BreadcrumbTrailExtension constructor.
-     * @param Trail $trail
-     * @param Environment $templating
      */
     public function __construct(Trail $trail, Environment $templating)
     {
@@ -43,21 +40,21 @@ public function __construct(Trail $trail, Environment $templating)
      */
     public function getFunctions()
     {
-        return array(
-            new TwigFunction("apy_breadcrumb_trail_render", array($this, "renderBreadcrumbTrail"), array("is_safe" => array("html"))),
-        );
+        return [
+            new TwigFunction('apy_breadcrumb_trail_render', [$this, 'renderBreadcrumbTrail'], ['is_safe' => ['html']]),
+        ];
     }
 
     /**
-     * Renders the breadcrumb trail in a list
+     * Renders the breadcrumb trail in a list.
      *
      * @return string
      */
     public function renderBreadcrumbTrail($template = null)
     {
         return $this->templating->render(
-                $template === null ? $this->trail->getTemplate() : $template,
-                array( 'breadcrumbs' => $this->trail )
+                null === $template ? $this->trail->getTemplate() : $template,
+                ['breadcrumbs' => $this->trail]
         );
     }
 
@@ -68,6 +65,6 @@ public function renderBreadcrumbTrail($template = null)
      */
     public function getName()
     {
-        return "breadcrumbtrail";
+        return 'breadcrumbtrail';
     }
 }
diff --git a/tests/Annotation/BreadcrumbTest.php b/tests/Annotation/BreadcrumbTest.php
index 68cb84b..9c09141 100644
--- a/tests/Annotation/BreadcrumbTest.php
+++ b/tests/Annotation/BreadcrumbTest.php
@@ -8,7 +8,7 @@ class BreadcrumbTest extends TestCase
 {
     public function testConstructWithSimpleTitle()
     {
-        $expected = "title-of-the-breadcrumb";
+        $expected = 'title-of-the-breadcrumb';
         $breadcrumb = new Breadcrumb($expected);
 
         self::assertEquals($expected, $breadcrumb->getTitle());
@@ -16,7 +16,7 @@ public function testConstructWithSimpleTitle()
 
     public function testConstructWithLegacyArray()
     {
-        $expected = "title-of-the-breadcrumb";
+        $expected = 'title-of-the-breadcrumb';
         $breadcrumb = new Breadcrumb(['title' => $expected]);
 
         self::assertEquals($expected, $breadcrumb->getTitle());
@@ -24,11 +24,11 @@ public function testConstructWithLegacyArray()
 
     public function testConstructWithLegacyRouteArray()
     {
-        $expected = "title-of-the-breadcrumb";
+        $expected = 'title-of-the-breadcrumb';
         $expectedRouteAbsolute = true;
         $breadcrumb = new Breadcrumb([
             'title' => $expected,
-            'route' => ['absolute' => $expectedRouteAbsolute]
+            'route' => ['absolute' => $expectedRouteAbsolute],
         ]);
 
         self::assertEquals($expected, $breadcrumb->getTitle());
@@ -37,7 +37,7 @@ public function testConstructWithLegacyRouteArray()
 
     public function testValueWillGetInterpretedAsTitle()
     {
-        $expected = "title-of-the-breadcrumb";
+        $expected = 'title-of-the-breadcrumb';
         $breadcrumb = new Breadcrumb(['value' => $expected]);
 
         self::assertEquals($expected, $breadcrumb->getTitle());
@@ -45,8 +45,8 @@ public function testValueWillGetInterpretedAsTitle()
 
     public function testUnnamedWillGetInterpretedAsValueForTitle()
     {
-        $expected = "title-of-the-breadcrumb";
-        $breadcrumb = new Breadcrumb([$expected, 'route' => ["name" => "my_route"]]);
+        $expected = 'title-of-the-breadcrumb';
+        $breadcrumb = new Breadcrumb([$expected, 'route' => ['name' => 'my_route']]);
 
         self::assertEquals($expected, $breadcrumb->getTitle());
     }
diff --git a/tests/EventListener/BreadcrumbListenerTest.php b/tests/EventListener/BreadcrumbListenerTest.php
index b9262eb..1f1a9c6 100644
--- a/tests/EventListener/BreadcrumbListenerTest.php
+++ b/tests/EventListener/BreadcrumbListenerTest.php
@@ -87,6 +87,7 @@ private function createControllerEvent($controller)
         if (Kernel::MAJOR_VERSION <= 4) {
             return new FilterControllerEvent($this->kernel, [$controller, 'indexAction'], new Request(), HttpKernelInterface::MASTER_REQUEST);
         }
+
         return new ControllerEvent($this->kernel, [$controller, 'indexAction'], new Request(), HttpKernelInterface::MASTER_REQUEST);
     }
 }
diff --git a/tests/ExtensionTest.php b/tests/ExtensionTest.php
index d6281f8..d20bf86 100644
--- a/tests/ExtensionTest.php
+++ b/tests/ExtensionTest.php
@@ -13,7 +13,7 @@ class ExtensionTest extends AbstractExtensionTestCase
     protected function getContainerExtensions(): array
     {
         return [
-            new APYBreadcrumbTrailExtension()
+            new APYBreadcrumbTrailExtension(),
         ];
     }