卸载了PHP的HTTP_Upload
>pear uninstall HTTP_Upload
uninstall ok: channel://pear.php.net/HTTP_Upload-0.9.1
但重新安装时，出错
>pear install HTTP_Upload
No releases available for package "pear.php.net/HTTP_Upload"
install failed
执行pear clear-cache了，后在重新安装成功
>pear clear-cache
reading directory ...\pear\cache
30 cache entries cleared
>pear install HTTP_Upload
downloading HTTP_Upload-0.9.1.tgz ...
Starting to download HTTP_Upload-0.9.1.tgz (9,460 bytes)
.....done: 9,460 bytes
install ok: channel://pear.php.net/HTTP_Upload-0.9.1
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