Merge branch '3.4' into 4.4

* 3.4:
  [Filesystem] fix for PHP 8

Author: nicolas-grekas

Store/PdoStore.php

@@ -13,7 +13,6 @@
 
 use Doctrine\DBAL\Connection;
 use Doctrine\DBAL\DBALException;
-use Doctrine\DBAL\Driver\Result;
 use Doctrine\DBAL\DriverManager;
 use Doctrine\DBAL\Exception;
 use Doctrine\DBAL\Schema\Schema;
@@ -173,7 +172,7 @@ public function putOffExpiration(Key $key, $ttl)
         $result = $stmt->execute();
 
         // If this method is called twice in the same second, the row wouldn't be updated. We have to call exists to know if we are the owner
-        if (!($result instanceof Result ? $result : $stmt)->rowCount() && !$this->exists($key)) {
+        if (!(\is_object($result) ? $result : $stmt)->rowCount() && !$this->exists($key)) {
             throw new LockConflictedException();
         }
 
@@ -205,7 +204,7 @@ public function exists(Key $key)
         $stmt->bindValue(':token', $this->getUniqueToken($key));
         $result = $stmt->execute();
 
-        return (bool) ($result instanceof Result ? $result->fetchOne() : $stmt->fetchColumn());
+        return (bool) (\is_object($result) ? $result->fetchOne() : $stmt->fetchColumn());
     }
 
     /**