How to expire a password

and call it expire_password. You need to decide several things, where to store the expiry date and what options to provide. You have two choices on where to store the expiry, as a profile field or in a separate table shadowing the users table. There are pros and cons for either approach.

Then maybe options such as how to alert the user that pw is about to expire. How much warning, eg if there are 7 days before expiration you might warn every day as the expiry approaches. There may be different expiry periods according to user role. These could be stored in {variable} table.

To trigger the expiry on login would be something like this:

Without experimenting, I can't be sure the validate will be triggered, you might have to use _form_alter first to add the extra validation function.

I guess how much sense this makes depends on your familiarity with drupal, php and mysql. If you would like to try this and you get stuck, pm me and I will try to help.

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