Make display_post_states easier to filter

[greenshady]

In wp-admin/includes/template.php, there's a filter hook on the post states array. This is a list appended to the post title in the edit posts list. Right now, you can filter display_post_states, but it's tough to change a single item.

Suppose I wanted to change the "Post format" text and do something a little different such as add an icon. Currently, I could filter the display_post_states array and get the array key by searching for something like the below:

'<span>[</span>' . get_post_format_string( get_post_format( $post->ID ) ) . '<span>]</span>';

This doesn't seem like the best way to go about it. One would need to do an array_search() or something similar to handle that.

Since the hook is on an array, it makes sense to provide specific array keys that can be overwritten with a filter. So, in my filter, I could do something like this:

$states['post_format'] = '<img src="#" alt="" />';

I'll attach a patch that makes this possible.

[greenshady]

Give specific array keys to post states array

[nacin]

I like. Patch needs refresh. FYI, the post_format will likely be becoming a column in 3.2.

[kawauso]

No more $post_statespost_format?

[nacin]

(In [17544]) Send an associative array to the display_post_states filter. props greenshady, kawauso, fixes #15421.