Issue #3431996 by el7cosmos: Setup phpcs and phpstan config

phpcs.xml.dist

+<?xml version="1.0"?>
+<ruleset name="Drupal Coding Standards">
+  <description>Enforce Drupal coding standards with some exceptions</description>
+
+  <rule ref="./web/core/phpcs.xml.dist">
+    <exclude name="Drupal.Commenting.ClassComment.Short"/>
+  </rule>
+
+  <rule ref="Drupal"/>
+
+  <rule ref="DrupalPractice">
+    <exclude name="DrupalPractice.Commenting.CommentEmptyLine.SpacingAfter"/>
+  </rule>
+</ruleset>

phpstan.neon.dist

+parameters:
+  level: max
+  checkMissingIterableValueType: false
+  treatPhpDocTypesAsCertain: false

src/Batch/PhpRedisBatchStorage.php

@@ -79,11 +79,14 @@ class PhpRedisBatchStorage implements BatchStorageInterface {
 
   /**
    * {@inheritdoc}
+   *
+   * @phpstan-return array|false
    */
   public function load($id) {
     $this->session->start();
     $hash = $this->getClient()->hGetAll($this->getPrefix() . ':' . $id);
-    if ($hash && $this->csrfToken->validate($hash['token'], $id)) {
+    if ($hash && $this->csrfToken->validate($hash['token'], (string) $id)) {
+      /** @var array */
       return $this->serializer::decode($hash['batch']);
     }