apache，创建 alias

    alias /php_yii "/home/ethan/git_repo/misc/php_yii"
    <Directory "/home/ethan/git_repo/misc/php_yii">
        Options FollowSymlinks
        # Limit: Allow use of the directives controlling host access (Allow, Deny and Order).
        AllowOverride Limit
        Require all granted
    </Directory>