用Eclipse调试PHP，默认是使用XAMPP作为AMP环境，下载Portable版本XAMPP，运行：“xampp_start.exe”提示错误：
Error: Apache shutdown unexpectedly. This may be due to a blocked port, missing dependencies, improper privileges, a crash, or a shutdown by another method. Check the "/xampp/apache/logs/error.log" file and the Windows Event Viewer for more clues
找了一圈，没找到真正原因，最后回头看readme，
[NOTE: Unpack the package to your USB stick or a partition of your choice.
There it must be on the highest level like E:\ or W:. It will
build E:\xampp or W:\xampp or something like this. Please do not use the "setup_xampp.bat" for an USB stick installation!]
已经提示必须安装在根目录下，移动目录到根目录，就可以成功启动XAMPP。
XAMPP提供了面板xampp-control，集成了一些小工具还是蛮实用的，比如netstat，显示所有端口占用情况。
