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php-general | 2001072

[PHP] Revision Tracking - program concept From: Dave Freeman (dfreeman <email protected>)
Date: 07/30/01

G'day All

I'm writing an application for an intranet environment. At the moment I'm
writing a document control system. The intention is that people will be
able to check in documents (generally created in MS Word from
templates) and the app will upload them to the server.

The process related to this involves other people then checking the
documents back out and making appropriate changes based on their
responsibilities and then checking the documents back into the system
again.

What I would like to do is keep track of each revision of these documents
(ie. actually provide a capability to review earlier revisions, or, indeed,
revert to earlier revisions).

At this stage I am planning to track information about each document in
an SQL table but not actually store the binary data in the table (there are
additional reasons behind this).

The only solution I've come up with that will easily implement some sort of
revision system would be to store only the last five, for example, revisions
and then use duplicate SQL tables to store older iterations of the
document with suitable links in the SQL back to the current version.

Can anyone suggest an alternate approach that will let me do this?

More from a program logic point of view than from an actual code example
point of view really. I guess that makes this close to off-topic but there
you go - hopefully it won't be considered too out of place.

CYA, Dave

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