php 上传文件至server有关问题，server操作系统为centos
php 上传文件至server问题，server操作系统为centos
小弟做的这个项目基于yii framework,其中一个上传文件的功能，我是用xupload这个插件实现的。
当用户上传文件后，脚本会在目标server(OS:centos)上的根目录下新建一个关于当前上传时间的文件夹例如:2014_8_3_8_39，然后将文件写入其中。
这个代码在几台server上部署后上传的功能都没问题。但要命的是就是在目标测试机上出了问题：文件夹可以建，但是就是内容为空，也就是文件没有上传进去。
小弟检查了httpd日志，也没发现问题。php.ini下两个关于上传文件大小的字段也改了也无济于事。但在别的机器相同的操作系统,相同的php版本下都没问题。
所以我想可能是那台机器配置的问题。小弟对linux不太了解，希望懂的朋友能及时伸出援手，感激不尽！
------解决方案--------------------
先上传一个几k的小文件，以确定不是 php 配置问题
上传文件夹创建在根目录下，本身就是个错误
必然引发种种权限问题。同时文件也不能被 web 方式访问到
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