Generate a list of files in the Getdropbox public download directory using PHP.

GetDropbox always brings surprises. I originally thought that files under the "Public" folder could only be published for download (most web servers can restrict browsing), but today I discovered that HTML pages and JPG image files, as well as all front-end files, can actually be directly viewed on the web. This gives GetDropbox another use: a convenient, free, and up to 5GB static web hosting space! (Introduction to GetDropbox: Sync and storage service DropBox offers free reward-based upgrades with a maximum of 5GB.)

Of course, the Public folder in GetDropbox is mainly used for sharing files. Long URLs like dl.getdropbox.com/u/**** are not very suitable for publishing websites. However, we can create a web index for the files in the Public folder to help users quickly search. Purely static development might not be ideal, so I wrote a PHP script—just 40 lines, with two functions for recursively traversing directories and generating index files, along with a front-end form for specifying paths. This script can generate indexes for any directory on the server. Placing the generated file in the Public folder would look like this: http://dl.getdropbox.com/u/142189/index.htm. Of course, with slight modifications, this program can also be used for FTP or local non-server directory searches.