refactor: use class constant for magic number

Author: kenjis

system/Session/Handlers/RedisHandler.php

@@ -22,6 +22,11 @@
  */
 class RedisHandler extends BaseHandler
 {
+    /**
+     * @var int
+     */
+    private const REDIS_DEFAULT_PORT = 6379;
+
     /**
      * phpRedis instance
      *
@@ -77,7 +82,7 @@ public function __construct(AppConfig $config, string $ipAddress)
 
             $this->savePath = [
                 'host'     => $matches[1],
-                'port'     => empty($matches[2]) ? 6379 : $matches[2],
+                'port'     => empty($matches[2]) ? self::REDIS_DEFAULT_PORT : $matches[2],
                 'password' => preg_match('#auth=([^\s&]+)#', $matches[3], $match) ? $match[1] : null,
                 'database' => preg_match('#database=(\d+)#', $matches[3], $match) ? (int) $match[1] : 0,
                 'timeout'  => preg_match('#timeout=(\d+\.\d+)#', $matches[3], $match) ? (float) $match[1] : 0,