symfony
diff --git a/‎src/Symfony/Component/Cache/Adapter/MemcachedAdapter.php
Copy file name to clipboardExpand all lines: src/Symfony/Component/Cache/Adapter/MemcachedAdapter.php
+5-12Lines changed: 5 additions & 12 deletions b/‎src/Symfony/Component/Cache/Adapter/MemcachedAdapter.php
Copy file name to clipboardExpand all lines: src/Symfony/Component/Cache/Adapter/MemcachedAdapter.php
+5-12Lines changed: 5 additions & 12 deletions
@@ -32,13 +32,6 @@ class MemcachedAdapter extends AbstractAdapter
 
     protected $maxIdLength = 250;
 
-    private const DEFAULT_CLIENT_OPTIONS = [
-        'persistent_id' => null,
-        'username' => null,
-        'password' => null,
-        \Memcached::OPT_SERIALIZER => \Memcached::SERIALIZER_PHP,
-    ];
-
     private $marshaller;
     private $client;
     private $lazyClient;
@@ -106,10 +99,9 @@ public static function createConnection($servers, array $options = [])
         }
         set_error_handler(function ($type, $msg, $file, $line) { throw new \ErrorException($msg, 0, $type, $file, $line); });
         try {
-            $options += static::DEFAULT_CLIENT_OPTIONS;
-            $client = new \Memcached($options['persistent_id']);
-            $username = $options['username'];
-            $password = $options['password'];
+            $client = new \Memcached($options['persistent_id'] ?? null);
+            $username = $options['username'] ?? null;
+            $password = $options['password'] ?? null;
 
             // parse any DSN in $servers
             foreach ($servers as $i => $dsn) {
@@ -180,6 +172,7 @@ public static function createConnection($servers, array $options = [])
             // set client's options
             unset($options['persistent_id'], $options['username'], $options['password'], $options['weight'], $options['lazy']);
             $options = array_change_key_case($options, \CASE_UPPER);
+
             $client->setOption(\Memcached::OPT_BINARY_PROTOCOL, true);
             $client->setOption(\Memcached::OPT_NO_BLOCK, true);
             $client->setOption(\Memcached::OPT_TCP_NODELAY, true);
@@ -199,7 +192,7 @@ public static function createConnection($servers, array $options = [])
                     $options[\constant('Memcached::OPT_'.$name)] = $value;
                 }
             }
-            $client->setOptions($options);
+            $client->setOptions($options + [\Memcached::OPT_SERIALIZER => \Memcached::SERIALIZER_PHP]);
 
             // set client's servers, taking care of persistent connections
             if (!$client->isPristine()) {