link_updated not recording a timestamp

[lenasterg]

Suggested patch fix for the issued described in ​https://wordpress.org/support/topic/link_updated-not-recording-a-timestamp/ by @publicradio

I have noticed that when I add or update a link, and then print_r get_bookmarks, every link object in the array has [link_updated] => 0000-00-00 00:00:00 and this will never update, even if I update the link.

Is there a way I can get the links manager to actually record when the link was updated?

Fixes the issue described in ​https://wordpress.org/support/topic/link_updated-not-recording-a-timestamp/ When a link is created or updated the 'link_updated' date_time field remains '0000-00-00 00:00:00'.
With this fix, the 'link_updated' gets updated.

Trac ticket: https://core.trac.wordpress.org/ticket/56851

Trac ticket:

[audrasjb]

Moving for 6.8 consideration. Thanks @lenasterg for the ping.

I can confirm the PR fixes the issue: the link_updated col in the database is modified when a link is edited. Also, it's filled when a link is created (which wasn't the case before).

Even if Link Manager is an old feature deprecated for a long time, it's still nice to fix that inconsistent behavior were a DB column is present but not even used at all despite its name (link_updated).

[audrasjb]

In 59923:

Bookmarks: Update link_updated when a link is created or updated.

This changeset fixes an issue where the link_updated field was not updated in the old Link Manager. When a link was created or updated the link_updated field remained 0000-00-00 00:00:00.

Props lenasterg, audrasjb.
Fixes #56851.