1. 程序初始化注册文件，加入如下：

'urlManager' =>[

'class' => 'yii\web\UrlManager',

'showScriptName' =>false,

'enablePrettyUrl' => true,

]

2. 入口同级目录增加 .htaccess，内容如下

RewriteEngine on
# If a directory or a file exists, use it directly
RewriteCond %{REQUEST_FILENAME} !-f
RewriteCond %{REQUEST_FILENAME} !-d
# Otherwise forward it to index.php
RewriteRule . index.php