Thanks for a great plugin. I can’t seem to get it to work on my MU installation, when I try to activate it just says it has triggered a fatal error. Any ideas what I could try?

Reply from Peter: Unfortunately, I haven’t looked at this plugin with MU since before WordPress 2.8 and probably won’t again until at least 3.0. I simply don’t run any MU installs at the moment. If anybody has any tips in the meantime, please post them

The error only seems to happen if I as the admin NEVER visit the Settings > Collaboration screen on the specific blog that a Contributor is saving a page as a pending review status.

I’m experience a strange error… I intermittantly get this upon submitting for review (either through edit or quick edit) on a white screen:

Warning: Invalid argument supplied for foreach() in /home/designab/public_html/2kwmu/wp-content/mu-plugins/peters_collaboration_emails_mu.php on line 125

Warning: Cannot modify header information – headers already sent by (output started at /path/to/my/site/wp-content/mu-plugins/peters_collaboration_emails_mu.php:123) in /path/to/my/site/wp-includes/pluggable.php on line 868

It’s weird because it’s happening sometimes…not all of the time. Also when I go back to the "Edit Pages" screen that lists all of them out, the status of the page is "pending" and the admin never receives the email.

Any ideas on how to fix this?

Reply from Peter: I would check to see whether it is looking up the correct database table (check the value of the variable $pce_db_group) and whether the table actually exists. Unfortunately, I haven’t been mirroring the changes of the normal plugin with the mu-plugins version since before WP 2.8, so the normal plugin in the “plugins” folder is your best bet. Unless some related project work comes up, I don’t plan on officially releasing an updated MU-ready version of the plugin until WP 3.0 when MU and non-MU are merged.

I’m running 1.3.0 on WordPress MU 2.9.1.1. I copied the plugin files to /plugins because I wanted it to show up in the WP plugins list. I activated it site-wide, and then I go into the backend of a chosen blog. I can see the settings page.

I select a moderator from the drop-down list, checkmark Add, and then click Update. The page refreshes and a yellow line shows where an error message would usually be, and the line looks like the border from the error message div, but there is no error message and the selected email is not added to the list.

Thank you for your help!

Reply from Peter: If you’re putting the plugin in the /plugins folder, try using the normal version of the plugin, which has a few updates.

My apologies if this plugin already does this, but I have not found anything that would allow me to do this.

Reply from Peter: By default the “Collaborator” role does not have the permission to create a page. However, if you tweak the permission system to allow that (and still force that user to “submit for review”), then the plugin will work with pages. Use the Capability Manager plugin to add or remove capabilities to existing roles (and also to add roles if needed).

Reply from Peter: That’s certainly possible, and some of the framework is in this plugin. You’d have to hook the code somewhere into the comment workflow. It would probably also be good to turn off the default comment e-mails and run that completely through your script. It’s not that difficult, but it’s at least a few hours of work, if not more.