Alias /mytest /www/mytest
<Directory /www/mytest>
AllowOverride all
Order allow,deny
Allow from all
</Directory>

为保证正常访问
需要在.htaccees文件里加入

RewriteBase /mytest

如下

RewriteEngine On
RewriteCond %{REQUEST_FILENAME} !-f
RewriteCond %{REQUEST_FILENAME} !-d
RewriteRule ^(.*)$ index.php?url=$1 [L]
RewriteBase /mytest