Ok, so still digging for answers, found this page:
Curtiss Grymala Member Posted 8 months ago
Obviously, you shouldn’t actually modify edit.php, as any changes will be overwritten when you upgrade WordPress.
However, you can try to use the manage_posts_columns filter to add a new column showing the scheduled/published time.
Which lead me to this:
http://scompt.com/blog/archives/2007/10/20/adding-custom-columns-to-the-wordpress-manage-posts-screen
It doesn’t have an example of my specific need, but I’ll keep looking to see if I stumble onto something.
So now at least I know I shouldn’t be messing with the edit.php or any other files like that.
Woot! My issue is resolved! Found something that does what I needed:
http://ww.wp.xz.cn/extend/plugins/custom-admin-column/
This came with 2 default new columns that it added to the Posts page that I didn’t really need, but gave me the plugin framework I needed to tweak and add what I wanted.
For anyone coming after me, in the custom_admin_columns.php file, find:
function cac_post_column_filter($columns) {
$columns['thumbnail'] = 'Featured Image';
$columns['slug'] = 'Permalink';
return $columns;
}
add_filter('manage_post_posts_columns', 'cac_post_column_filter');
After $columns['slug'] = 'Permalink'; Add:
$columns['date_modified'] = 'Date Modified';
Then find:
function cac_column_value($name, $id){
switch($name){
case 'slug':
$permalink = get_permalink($id);
echo '<a href="'. $permalink . '" target="_blank">' . $permalink . '</a>';
break;
case 'thumbnail':
if(function_exists('get_the_post_thumbnail'))
echo get_the_post_thumbnail($id, array(75,75));
break;
After the Thumbnail case, add:
case 'date_modified':
if(function_exists('the_modified_date'))
echo the_modified_date();
break;
Reference: http://codex.ww.wp.xz.cn/Function_Reference/the_modified_date
I also added a few other custom post field columns to my file from using ADV Custom Fields:
http://ww.wp.xz.cn/extend/plugins/advanced-custom-fields/
If anyone ever wants to know how I’ve implemented those, feel free to email me or reply to this post, I’m subscribed.
I think I’ll probably be using this guide to expand the functionality of my custom fields by adding them to the Quick Edit section of my site:
http://shibashake.com/wordpress-theme/expand-the-wordpress-quick-edit-menu
…And I’m just posting this here for posterity’s sake.
