最近在评估YII 2.0，实现perfy url的步骤如下 1 和 2
1.在 index.php 同级目录建立 .htaccess 文件 ，设置内容：

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`

2.为 config目录的web.php 增加配置项 urlManager，代码:

'urlManager' => [		
    'class' => 'yii\web\UrlManager',
    // Disable index.php
    'showScriptName' => false,
    // Disable r= routes
    'enablePrettyUrl' => true,
    'rules' => array(
    ),
],

以上2个步骤下来，There is Pretty URL ! ~(≧▽≦)/~
内容引用源：http://www.bsourcecode.com/yiiframework2/removing-index-php-from-url-in-yiiframework-2-0/