嗨，在我的codeigniter应用程序中，当我尝试连接mysql数据库时，发生了以下错误。
消息：mysqli:：real\u connect（）：（hy000/2002）：连接尝试失败，因为连接方在一段时间后没有正确响应，或者建立的连接失败，因为连接的主机没有响应。
我使用的是windows10系统
xampp 3.2.2版
php版本7.2.4
phpmyadmin 4.8.1
codeigniter配置设置

'dsn'      => '',
    'hostname' => 'localhost',
    'username' => 'root',
    'password' => '',
    'database' => 'XXXXXX',
    'dbdriver' => 'mysqli',
    'dbprefix' => 'ss_',
    'pconnect' => FALSE,
    'db_debug' => (ENVIRONMENT !== 'development'),
    'cache_on' => FALSE,
    'cachedir' => '',
    'char_set' => 'utf8',
    'dbcollat' => 'utf8_general_ci',
    'swap_pre' => '',
    'encrypt'  => FALSE,
    'compress' => FALSE,
    'stricton' => FALSE,
    'failover' => array(),
    'save_queries' => TRUE

有些人建议将主机名改为127.0.0.1，但这对我不起作用，有些人建议编辑 System32\drivers\etc\host 但是我没有得到任何正面的设置结果，这里我也附上了主机设置

# Copyright (c) 1993-2009 Microsoft Corp.

# 

# This is a sample HOSTS file used by Microsoft TCP/IP for Windows.

# 

# This file contains the mappings of IP addresses to host names. Each

# entry should be kept on an individual line. The IP address should

# be placed in the first column followed by the corresponding host name.

# The IP address and the host name should be separated by at least one

# space.

# 

# Additionally, comments (such as these) may be inserted on individual

# lines or following the machine name denoted by a '#' symbol.

# 

# For example:

# 

# 102.54.94.97     rhino.acme.com          # source server

# 38.25.63.10     x.acme.com              # x client host

# localhost name resolution is handled within DNS itself.

# 127.0.0.1       localhost

# ::1             localhost