Edit file File name : Cache_redis.php Content :<?php /** * CodeIgniter * * An open source application development framework for PHP * * This content is released under the MIT License (MIT) * * Copyright (c) 2014 - 2019, British Columbia Institute of Technology * * Permission is hereby granted, free of charge, to any person obtaining a copy * of this software and associated documentation files (the "Software"), to deal * in the Software without restriction, including without limitation the rights * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell * copies of the Software, and to permit persons to whom the Software is * furnished to do so, subject to the following conditions: * * The above copyright notice and this permission notice shall be included in * all copies or substantial portions of the Software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN * THE SOFTWARE. * * @package CodeIgniter * @author EllisLab Dev Team * @copyright Copyright (c) 2008 - 2014, EllisLab, Inc. (https://ellislab.com/) * @copyright Copyright (c) 2014 - 2019, British Columbia Institute of Technology (https://bcit.ca/) * @license https://opensource.org/licenses/MIT MIT License * @link https://codeigniter.com * @since Version 3.0.0 * @filesource */ defined('BASEPATH') OR exit('No direct script access allowed'); /** * CodeIgniter Redis Caching Class * * @package CodeIgniter * @subpackage Libraries * @category Core * @author Anton Lindqvist <anton@qvister.se> * @link */ class CI_Cache_redis extends CI_Driver { /** * Default config * * @static * @var array */ protected static $_default_config = array( 'socket_type' => 'tcp', 'host' => '127.0.0.1', 'password' => NULL, 'port' => 6379, 'timeout' => 0 ); /** * Redis connection * * @var Redis */ protected $_redis; /** * An internal cache for storing keys of serialized values. * * @var array */ protected $_serialized = array(); /** * del()/delete() method name depending on phpRedis version * * @var string */ protected static $_delete_name; // ------------------------------------------------------------------------ /** * Class constructor * * Setup Redis * * Loads Redis config file if present. Will halt execution * if a Redis connection can't be established. * * @return void * @see Redis::connect() */ public function __construct() { if ( ! $this->is_supported()) { log_message('error', 'Cache: Failed to create Redis object; extension not loaded?'); return; } isset(static::$_delete_name) OR static::$_delete_name = version_compare(phpversion('phpredis'), '5', '>=') ? 'del' : 'delete'; $CI =& get_instance(); if ($CI->config->load('redis', TRUE, TRUE)) { $config = array_merge(self::$_default_config, $CI->config->item('redis')); } else { $config = self::$_default_config; } $this->_redis = new Redis(); try { if ($config['socket_type'] === 'unix') { $success = $this->_redis->connect($config['socket']); } else // tcp socket { $success = $this->_redis->connect($config['host'], $config['port'], $config['timeout']); } if ( ! $success) { log_message('error', 'Cache: Redis connection failed. Check your configuration.'); } if (isset($config['password']) && ! $this->_redis->auth($config['password'])) { log_message('error', 'Cache: Redis authentication failed.'); } } catch (RedisException $e) { log_message('error', 'Cache: Redis connection refused ('.$e->getMessage().')'); } } // ------------------------------------------------------------------------ /** * Get cache * * @param string $key Cache ID * @return mixed */ public function get($key) { $value = $this->_redis->get($key); if ($value !== FALSE && $this->_redis->sIsMember('_ci_redis_serialized', $key)) { return unserialize($value); } return $value; } // ------------------------------------------------------------------------ /** * Save cache * * @param string $id Cache ID * @param mixed $data Data to save * @param int $ttl Time to live in seconds * @param bool $raw Whether to store the raw value (unused) * @return bool TRUE on success, FALSE on failure */ public function save($id, $data, $ttl = 60, $raw = FALSE) { if (is_array($data) OR is_object($data)) { if ( ! $this->_redis->sIsMember('_ci_redis_serialized', $id) && ! $this->_redis->sAdd('_ci_redis_serialized', $id)) { return FALSE; } isset($this->_serialized[$id]) OR $this->_serialized[$id] = TRUE; $data = serialize($data); } else { $this->_redis->sRemove('_ci_redis_serialized', $id); } return $this->_redis->set($id, $data, $ttl); } // ------------------------------------------------------------------------ /** * Delete from cache * * @param string $key Cache key * @return bool */ public function delete($key) { if ($this->_redis->{static::$_delete_name}($key) !== 1) { return FALSE; } $this->_redis->sRemove('_ci_redis_serialized', $key); return TRUE; } // ------------------------------------------------------------------------ /** * Increment a raw value * * @param string $id Cache ID * @param int $offset Step/value to add * @return mixed New value on success or FALSE on failure */ public function increment($id, $offset = 1) { return $this->_redis->incrBy($id, $offset); } // ------------------------------------------------------------------------ /** * Decrement a raw value * * @param string $id Cache ID * @param int $offset Step/value to reduce by * @return mixed New value on success or FALSE on failure */ public function decrement($id, $offset = 1) { return $this->_redis->decrBy($id, $offset); } // ------------------------------------------------------------------------ /** * Clean cache * * @return bool * @see Redis::flushDB() */ public function clean() { return $this->_redis->flushDB(); } // ------------------------------------------------------------------------ /** * Get cache driver info * * @param string $type Not supported in Redis. * Only included in order to offer a * consistent cache API. * @return array * @see Redis::info() */ public function cache_info($type = NULL) { return $this->_redis->info(); } // ------------------------------------------------------------------------ /** * Get cache metadata * * @param string $key Cache key * @return array */ public function get_metadata($key) { $value = $this->get($key); if ($value !== FALSE) { return array( 'expire' => time() + $this->_redis->ttl($key), 'data' => $value ); } return FALSE; } // ------------------------------------------------------------------------ /** * Check if Redis driver is supported * * @return bool */ public function is_supported() { return extension_loaded('redis'); } // ------------------------------------------------------------------------ /** * Class destructor * * Closes the connection to Redis if present. * * @return void */ public function __destruct() { if ($this->_redis) { $this->_redis->close(); } } } Save