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msd2/phpBB3/phpbb/cache/driver/redis.php

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+<?php
+/**
+*
+* This file is part of the phpBB Forum Software package.
+*
+* @copyright (c) phpBB Limited <https://www.phpbb.com>
+* @license GNU General Public License, version 2 (GPL-2.0)
+*
+* For full copyright and license information, please see
+* the docs/CREDITS.txt file.
+*
+*/
+
+namespace phpbb\cache\driver;
+
+if (!defined('PHPBB_ACM_REDIS_PORT'))
+{
+	define('PHPBB_ACM_REDIS_PORT', 6379);
+}
+
+if (!defined('PHPBB_ACM_REDIS_HOST'))
+{
+	define('PHPBB_ACM_REDIS_HOST', 'localhost');
+}
+
+/**
+* ACM for Redis
+*
+* Compatible with the php extension phpredis available
+* at https://github.com/nicolasff/phpredis
+*
+*/
+class redis extends \phpbb\cache\driver\memory
+{
+	var $extension = 'redis';
+
+	var $redis;
+
+	/**
+	* Creates a redis cache driver.
+	*
+	* The following global constants affect operation:
+	*
+	* PHPBB_ACM_REDIS_HOST
+	* PHPBB_ACM_REDIS_PORT
+	* PHPBB_ACM_REDIS_PASSWORD
+	* PHPBB_ACM_REDIS_DB
+	*
+	* There are no publicly documented constructor parameters.
+	*/
+	function __construct()
+	{
+		// Call the parent constructor
+		parent::__construct();
+
+		$this->redis = new \Redis();
+
+		$args = func_get_args();
+		if (!empty($args))
+		{
+			$ok = call_user_func_array(array($this->redis, 'connect'), $args);
+		}
+		else
+		{
+			$ok = $this->redis->connect(PHPBB_ACM_REDIS_HOST, PHPBB_ACM_REDIS_PORT);
+		}
+
+		if (!$ok)
+		{
+			trigger_error('Could not connect to redis server');
+		}
+
+		if (defined('PHPBB_ACM_REDIS_PASSWORD'))
+		{
+			if (!$this->redis->auth(PHPBB_ACM_REDIS_PASSWORD))
+			{
+				global $acm_type;
+
+				trigger_error("Incorrect password for the ACM module $acm_type.", E_USER_ERROR);
+			}
+		}
+
+		$this->redis->setOption(\Redis::OPT_SERIALIZER, \Redis::SERIALIZER_PHP);
+		$this->redis->setOption(\Redis::OPT_PREFIX, $this->key_prefix);
+
+		if (defined('PHPBB_ACM_REDIS_DB'))
+		{
+			if (!$this->redis->select(PHPBB_ACM_REDIS_DB))
+			{
+				global $acm_type;
+
+				trigger_error("Incorrect database for the ACM module $acm_type.", E_USER_ERROR);
+			}
+		}
+	}
+
+	/**
+	* {@inheritDoc}
+	*/
+	function unload()
+	{
+		parent::unload();
+
+		$this->redis->close();
+	}
+
+	/**
+	* {@inheritDoc}
+	*/
+	function purge()
+	{
+		$this->redis->flushDB();
+
+		parent::purge();
+	}
+
+	/**
+	* Fetch an item from the cache
+	*
+	* @access protected
+	* @param string $var Cache key
+	* @return mixed Cached data
+	*/
+	function _read($var)
+	{
+		return $this->redis->get($var);
+	}
+
+	/**
+	* Store data in the cache
+	*
+	* @access protected
+	* @param string $var Cache key
+	* @param mixed $data Data to store
+	* @param int $ttl Time-to-live of cached data
+	* @return bool True if the operation succeeded
+	*/
+	function _write($var, $data, $ttl = 2592000)
+	{
+		if ($ttl == 0)
+		{
+			return $this->redis->set($var, $data);
+		}
+		return $this->redis->setex($var, $ttl, $data);
+	}
+
+	/**
+	* Remove an item from the cache
+	*
+	* @access protected
+	* @param string $var Cache key
+	* @return bool True if the operation succeeded
+	*/
+	function _delete($var)
+	{
+		if ($this->redis->delete($var) > 0)
+		{
+			return true;
+		}
+		return false;
+	}
+}