Moved cache drivers outside core to extensions (plugins)

plugins/cache-redis/Predis/Protocol/Text/RequestSerializer.php

@@ -0,0 +1,47 @@
+<?php
+
+/*
+ * This file is part of the Predis package.
+ *
+ * (c) Daniele Alessandri <suppakilla@gmail.com>
+ *
+ * For the full copyright and license information, please view the LICENSE
+ * file that was distributed with this source code.
+ */
+
+namespace Predis\Protocol\Text;
+
+use Predis\Command\CommandInterface;
+use Predis\Protocol\RequestSerializerInterface;
+
+/**
+ * Request serializer for the standard Redis wire protocol.
+ *
+ * @link http://redis.io/topics/protocol
+ *
+ * @author Daniele Alessandri <suppakilla@gmail.com>
+ */
+class RequestSerializer implements RequestSerializerInterface
+{
+    /**
+     * {@inheritdoc}
+     */
+    public function serialize(CommandInterface $command)
+    {
+        $commandID = $command->getId();
+        $arguments = $command->getArguments();
+
+        $cmdlen = strlen($commandID);
+        $reqlen = count($arguments) + 1;
+
+        $buffer = "*{$reqlen}\r\n\${$cmdlen}\r\n{$commandID}\r\n";
+
+        for ($i = 0, $reqlen--; $i < $reqlen; ++$i) {
+            $argument = $arguments[$i];
+            $arglen = strlen($argument);
+            $buffer .= "\${$arglen}\r\n{$argument}\r\n";
+        }
+
+        return $buffer;
+    }
+}