IIS环境下 php 文件无法上传的问题
本人是第一次接触PHP，学网上的例子写了一个文件上传的功能，发现无法正常上传。代码肯定是没有问题，因为在网上谷歌、百度了一遍，上传文件的代码都是一样的。
问题描述：上传后，$_FILES['tmp_name']的值为空。
经过一番搜索大法，我个人认为因为我用的是IIS而不是用Apache做Web服务器，默认情况下PHP.ini的upload_tmp_dir参数没有设置，可能默认的上传临时文件夹不存在(不知道哪位能明确告诉我是哪个文件夹，我猜是c://windwos/temp)或者是权限不够。于是，我将新建了一个文件夹作为临时文件夹，并设置everyone的完全权限(呵呵，本地测试就不那么讲究了)，并在PHP.ini设置upload_tmp_dir为这个文件夹。重启IIS后问题依旧。
后来我想，可能是我自己配置IIS+PHP有问题，于是从网上下载了集成的IIS+mysql+php的工具，安装后，问题解决了。
结论：还是自己的配置有问题。具体在哪里以后再说吧，先继续学习
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