refactor: improve on Redis implementation

Signed-off-by: otengkwame <developerkwame@gmail.com>

Author: otengkwame

CodeIgniter/Framework/libraries/Cache/drivers/Cache_redis.php

@@ -59,7 +59,8 @@ class CI_Cache_redis extends CI_Driver
 		'host' => '127.0.0.1',
 		'password' => null,
 		'port' => 6379,
-		'timeout' => 0
+		'timeout' => 0.0,
+		'database' => 0
 	];
 
 	/**

CodeIgniter/Framework/libraries/Session/drivers/Session_redis_driver.php

@@ -155,7 +155,19 @@ public function __construct(&$params)
 			$this->_config['save_path'] = $save_path;
 
 			if ($this->_config['match_ip'] === true) {
-				$this->_key_prefix .= $_SERVER['REMOTE_ADDR'] . ':';
+				if (isset($matches['options'])) {
+					$save_path['password'] = preg_match('#auth=([^\s&]+)#', $matches['options'], $match) ? $match[1] : NULL;
+					$save_path['database'] = preg_match('#database=(\d+)#', $matches['options'], $match) ? (int) $match[1] : NULL;
+					$save_path['timeout']  = preg_match('#timeout=(\d+\.\d+)#', $matches['options'], $match) ? (float) $match[1] : 0.0;
+
+					preg_match('#prefix=([^\s&]+)#', $matches['options'], $match) && $this->_key_prefix = $match[1];
+				}
+
+				$this->_config['save_path'] = $save_path;
+
+				if ($this->_config['match_ip'] === true) {
+					$this->_key_prefix .= $_SERVER['REMOTE_ADDR'] . ':';
+				}
 			}
 		}
 	}