[Plugin: RSSInjection] Feature: new tag [post_categories]?

That depends, What is the tag?

Thanks for the super fast reply!

[post_categories]
would produce a comma separated list of the categories the post belongs to.

Our blog has a special guest author category and we would like to emphasize that for each guest post. Of course the optimal way of doing this would be having conditional tags, say [if category=53]This is a guest post by [post_author][/if], but I’m afraid that’s too much to ask for. Anyways, just having a list of applied categories would help a lot!

The existing tags map directly to existing WordPress functions and so are only 1 line. What you require is more of a custom feature that is more tailored to your needs than to anybody elses.
If you still require the changes contact us here
https://dcoda.co.uk/contact/
To discuss a custom version.
Regards
Dcoda.

Thanks for the offer! I’ll make a counter-offer, though. ??

How about changing $replace variable to

$replace = array (
                        'post_author' => 'get_the_author' ,
                        'post_url' => 'get_permalink' ,
                        'post_date' => 'get_the_modified_date' ,
                        'post_time' => 'get_the_modified_time' ,
                        'post_title' => 'get_the_title' ,
                        'blog_url' => array (
                                'get_bloginfo' , array (
                                        'url'
                )
                ) , 'blog_name' => array (
                        'get_bloginfo' , array (
                        'name'
                )
                ) , 'post_categories' => array (
                        'get_the_category_list', array (
                        ', '
                )
                )
                );

at application/controllers/rrsinjectionfilters.php?

That is, [post_categories] would implement get_the_category_list function (https://codex.www.ads-software.com/Function_Reference/get_the_category_list).

If thats all you want then.
Its been added to the todo ist ??

Yes, that’ll have to do as the feature is not that critical for us.

Thank you for adding it on the list!

Can I also use [post_categories] to display the category under which article is written?