QuiXplorer - web-based file-management

The best Filemanagement system PHP what i choose is QuiXplorer.
Here is the detail from contributor:

QuiXplorer is a multi-user, web-based file-manager.
It allows you to manage and/or share files over the internet, or an intranet.

The latest version provides the following functionality:

• Browsing directories; showing names, file sizes,
  file types, modification times and permissions
• Copying, moving and deleting files
• Searching for files and directories
• Uploading and downloading files
• Editing text files
• Creating new files and directories
• Changing file permissions

In multi-user mode:

• Users are authenticated.
• Administrators can manage users.
• Each user has his/her own settings.

QuiXplorer is currently available in English, Dutch, German, French, Spanish and Russian.

Screenshoot:
Source: http://quixplorer.sourceforge.net