File Management with PHP - The Main Program (
Page 4 of 4 )
When you execute
file_upload_manager.php, the code is executed first and the other functions
described above are called in the middle of the program. Once the user selects
the file and clicks upload, the main program part is executed. Here the program
gets the upload file information like file size, file type, date modified and
time stamp. Next it checks for the file existence in the destination folder. If
the file is present the "if" part of the program gets executed, otherwise the
file is copied to the destination folder and the file information is inserted in
the database. If the file exists, and if the file size and/or time stamp
differs, Get_New_File_Name() function is called to generate a new file name.
Then the file is copied to the destination folder and the file information is
stored in the database. If the file exists and the user had checked the "Replace
Existing File" option, the file is replaced and the file information is updated
in the database accordingly.
Otherwise, the user is redirected to the
file_display_manager.php page and the message "A previous version of this file
exists" is displayed.
File Display Manager:
This PHP script handles the
displaying of files present in the folder. As described in the plan, the program
will display the file name, size, type and an option to delete the
file.
dir_display
() Function:
This function displays the files available in the folder in a table. The
template looks like this:
File Manager
|
Size |
Type |
Modified |
| |
| abc.doc |
25 Kb |
doc |
Oct 01, 2003 |
Delete |
| xyz.txt |
24 bytes |
txt |
Oct 03, 2003 |
Delete |
| abc.doc |
48 Kb |
doc |
Oct 05, 2003 |
Delete |
| abc.doc |
67 Kb |
doc |
Nov 05, 2003 |
Delete |
| xyz.txt |
58 bytes |
txt |
Oct 23, 2003 |
Delete |
You can see that the file names are repeated, but you can see the file size
and date modified differs. To view and/or download the file, you can click the
hyperlink of the file name. This will show you the file name of the different
version. You can customize the program to include another field "Version" to
track the file version.
To delete a file, click on the 'Delete' hyperlink, which will prompt for
confirmation.
I welcome your comments and suggestions!
