diff --git a/src/Symfony/Component/Cache/Adapter/AbstractAdapter.php b/src/Symfony/Component/Cache/Adapter/AbstractAdapter.php
index b665aed4dc..7d54922f39 100644
--- a/src/Symfony/Component/Cache/Adapter/AbstractAdapter.php
+++ b/src/Symfony/Component/Cache/Adapter/AbstractAdapter.php
@@ -99,12 +99,6 @@ abstract class AbstractAdapter implements AdapterInterface, CacheInterface, Logg
      *
      * Using ApcuAdapter makes system caches compatible with read-only filesystems.
      *
-     * @param string               $namespace
-     * @param int                  $defaultLifetime
-     * @param string               $version
-     * @param string               $directory
-     * @param LoggerInterface|null $logger
-     *
      * @return AdapterInterface
      */
     public static function createSystemCache(string $namespace, int $defaultLifetime, string $version, string $directory, LoggerInterface $logger = null)
diff --git a/src/Symfony/Component/Cache/Adapter/AbstractTagAwareAdapter.php b/src/Symfony/Component/Cache/Adapter/AbstractTagAwareAdapter.php
index 57e21d52d9..93f1105bc7 100644
--- a/src/Symfony/Component/Cache/Adapter/AbstractTagAwareAdapter.php
+++ b/src/Symfony/Component/Cache/Adapter/AbstractTagAwareAdapter.php
@@ -128,7 +128,7 @@ abstract class AbstractTagAwareAdapter implements TagAwareAdapterInterface, TagA
      *
      * @return array The identifiers that failed to be cached or a boolean stating if caching succeeded or not
      */
-    abstract protected function doSave(array $values, ?int $lifetime, array $addTagData = [], array $removeTagData = []): array;
+    abstract protected function doSave(array $values, int $lifetime, array $addTagData = [], array $removeTagData = []): array;
 
     /**
      * Removes multiple items from the pool and their corresponding tags.
diff --git a/src/Symfony/Component/Cache/Adapter/ApcuAdapter.php b/src/Symfony/Component/Cache/Adapter/ApcuAdapter.php
index f7135aa148..62ba4d9a82 100644
--- a/src/Symfony/Component/Cache/Adapter/ApcuAdapter.php
+++ b/src/Symfony/Component/Cache/Adapter/ApcuAdapter.php
@@ -72,7 +72,7 @@ class ApcuAdapter extends AbstractAdapter
     /**
      * {@inheritdoc}
      */
-    protected function doHave($id)
+    protected function doHave(string $id)
     {
         return apcu_exists($id);
     }
diff --git a/src/Symfony/Component/Cache/Adapter/ArrayAdapter.php b/src/Symfony/Component/Cache/Adapter/ArrayAdapter.php
index e0fa91219f..095b329f61 100644
--- a/src/Symfony/Component/Cache/Adapter/ArrayAdapter.php
+++ b/src/Symfony/Component/Cache/Adapter/ArrayAdapter.php
@@ -31,7 +31,6 @@ class ArrayAdapter implements AdapterInterface, CacheInterface, LoggerAwareInter
     private $createCacheItem;
 
     /**
-     * @param int  $defaultLifetime
      * @param bool $storeSerialized Disabling serialization can lead to cache corruptions when storing mutable values but increases performance otherwise
      */
     public function __construct(int $defaultLifetime = 0, bool $storeSerialized = true)
diff --git a/src/Symfony/Component/Cache/Adapter/DoctrineAdapter.php b/src/Symfony/Component/Cache/Adapter/DoctrineAdapter.php
index 7da759d4b7..55a36e17f8 100644
--- a/src/Symfony/Component/Cache/Adapter/DoctrineAdapter.php
+++ b/src/Symfony/Component/Cache/Adapter/DoctrineAdapter.php
@@ -65,7 +65,7 @@ class DoctrineAdapter extends AbstractAdapter
     /**
      * {@inheritdoc}
      */
-    protected function doHave($id)
+    protected function doHave(string $id)
     {
         return $this->provider->contains($id);
     }
diff --git a/src/Symfony/Component/Cache/Adapter/FilesystemTagAwareAdapter.php b/src/Symfony/Component/Cache/Adapter/FilesystemTagAwareAdapter.php
index 2e8f6419dc..9abc1f013c 100644
--- a/src/Symfony/Component/Cache/Adapter/FilesystemTagAwareAdapter.php
+++ b/src/Symfony/Component/Cache/Adapter/FilesystemTagAwareAdapter.php
@@ -51,7 +51,7 @@ class FilesystemTagAwareAdapter extends AbstractTagAwareAdapter implements Prune
     /**
      * {@inheritdoc}
      */
-    protected function doSave(array $values, ?int $lifetime, array $addTagData = [], array $removeTagData = []): array
+    protected function doSave(array $values, int $lifetime, array $addTagData = [], array $removeTagData = []): array
     {
         $failed = $this->doSaveCache($values, $lifetime);
 
diff --git a/src/Symfony/Component/Cache/Adapter/MemcachedAdapter.php b/src/Symfony/Component/Cache/Adapter/MemcachedAdapter.php
index a625215529..c0d8bba435 100644
--- a/src/Symfony/Component/Cache/Adapter/MemcachedAdapter.php
+++ b/src/Symfony/Component/Cache/Adapter/MemcachedAdapter.php
@@ -276,7 +276,7 @@ class MemcachedAdapter extends AbstractAdapter
     /**
      * {@inheritdoc}
      */
-    protected function doHave($id)
+    protected function doHave(string $id)
     {
         return false !== $this->getClient()->get(rawurlencode($id)) || $this->checkResultCode(\Memcached::RES_SUCCESS === $this->client->getResultCode());
     }
diff --git a/src/Symfony/Component/Cache/Adapter/PdoAdapter.php b/src/Symfony/Component/Cache/Adapter/PdoAdapter.php
index d1c0b75a42..a96eb290c6 100644
--- a/src/Symfony/Component/Cache/Adapter/PdoAdapter.php
+++ b/src/Symfony/Component/Cache/Adapter/PdoAdapter.php
@@ -236,7 +236,7 @@ class PdoAdapter extends AbstractAdapter implements PruneableInterface
     /**
      * {@inheritdoc}
      */
-    protected function doHave($id)
+    protected function doHave(string $id)
     {
         $sql = "SELECT 1 FROM $this->table WHERE $this->idCol = :id AND ($this->lifetimeCol IS NULL OR $this->lifetimeCol + $this->timeCol > :time)";
         $stmt = $this->getConnection()->prepare($sql);
diff --git a/src/Symfony/Component/Cache/Adapter/PhpArrayAdapter.php b/src/Symfony/Component/Cache/Adapter/PhpArrayAdapter.php
index 080cc3cdd0..0f62f8380e 100644
--- a/src/Symfony/Component/Cache/Adapter/PhpArrayAdapter.php
+++ b/src/Symfony/Component/Cache/Adapter/PhpArrayAdapter.php
@@ -69,7 +69,7 @@ class PhpArrayAdapter implements AdapterInterface, CacheInterface, PruneableInte
      *
      * @return CacheItemPoolInterface
      */
-    public static function create($file, CacheItemPoolInterface $fallbackPool)
+    public static function create(string $file, CacheItemPoolInterface $fallbackPool)
     {
         // Shared memory is available in PHP 7.0+ with OPCache enabled
         if (filter_var(ini_get('opcache.enable'), FILTER_VALIDATE_BOOLEAN)) {
diff --git a/src/Symfony/Component/Cache/Adapter/PhpFilesAdapter.php b/src/Symfony/Component/Cache/Adapter/PhpFilesAdapter.php
index 57fb3b7311..1c90b0972f 100644
--- a/src/Symfony/Component/Cache/Adapter/PhpFilesAdapter.php
+++ b/src/Symfony/Component/Cache/Adapter/PhpFilesAdapter.php
@@ -165,7 +165,7 @@ class PhpFilesAdapter extends AbstractAdapter implements PruneableInterface
     /**
      * {@inheritdoc}
      */
-    protected function doHave($id)
+    protected function doHave(string $id)
     {
         if ($this->appendOnly && isset($this->values[$id])) {
             return true;
diff --git a/src/Symfony/Component/Cache/Adapter/Psr16Adapter.php b/src/Symfony/Component/Cache/Adapter/Psr16Adapter.php
index 333c4af174..a13b20ebc2 100644
--- a/src/Symfony/Component/Cache/Adapter/Psr16Adapter.php
+++ b/src/Symfony/Component/Cache/Adapter/Psr16Adapter.php
@@ -55,7 +55,7 @@ class Psr16Adapter extends AbstractAdapter implements PruneableInterface, Resett
     /**
      * {@inheritdoc}
      */
-    protected function doHave($id)
+    protected function doHave(string $id)
     {
         return $this->pool->has($id);
     }
diff --git a/src/Symfony/Component/Cache/Adapter/RedisTagAwareAdapter.php b/src/Symfony/Component/Cache/Adapter/RedisTagAwareAdapter.php
index 9cf0f5220a..5ee86d7564 100644
--- a/src/Symfony/Component/Cache/Adapter/RedisTagAwareAdapter.php
+++ b/src/Symfony/Component/Cache/Adapter/RedisTagAwareAdapter.php
@@ -88,7 +88,7 @@ class RedisTagAwareAdapter extends AbstractTagAwareAdapter
     /**
      * {@inheritdoc}
      */
-    protected function doSave(array $values, ?int $lifetime, array $addTagData = [], array $delTagData = []): array
+    protected function doSave(array $values, int $lifetime, array $addTagData = [], array $delTagData = []): array
     {
         // serialize values
         if (!$serialized = $this->marshaller->marshall($values, $failed)) {
diff --git a/src/Symfony/Component/Cache/Traits/FilesystemTrait.php b/src/Symfony/Component/Cache/Traits/FilesystemTrait.php
index 90c2f2e442..8418ee4481 100644
--- a/src/Symfony/Component/Cache/Traits/FilesystemTrait.php
+++ b/src/Symfony/Component/Cache/Traits/FilesystemTrait.php
@@ -81,7 +81,7 @@ trait FilesystemTrait
     /**
      * {@inheritdoc}
      */
-    protected function doHave($id)
+    protected function doHave(string $id)
     {
         $file = $this->getFile($id);
 
diff --git a/src/Symfony/Component/Cache/Traits/RedisTrait.php b/src/Symfony/Component/Cache/Traits/RedisTrait.php
index 46f3ddd736..226ab6f172 100644
--- a/src/Symfony/Component/Cache/Traits/RedisTrait.php
+++ b/src/Symfony/Component/Cache/Traits/RedisTrait.php
@@ -324,7 +324,7 @@ trait RedisTrait
     /**
      * {@inheritdoc}
      */
-    protected function doHave($id)
+    protected function doHave(string $id)
     {
         return (bool) $this->redis->exists($id);
     }