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I am trying to change the output of the previous_post_link and the next_post_link and basically add a query argument to them. The documentation just mentions that you can use the %link placeholder that is basically replaced by <a href="... the whole shebang. This does not help me, since I can't just add the query argument using simple concatenation.

Even if there is no direct way to actually use add_query_arg on the template tag, is there at least some kind of documentation regarding the placeholders that are available to me (besides %link)? If it is possible to do that and I have just the href value part available to me, I could just build my own markup with it.

I did an extensive google search on the subject and even checked the implementation of previous_post_link and next_post_link in wp-includes/link-template.php, but just the post is returned there (no mention to how this thing is themed at all).

Thanks in advance for any insight that you can provide.

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previous_post_link and its sibling are pretty simple functions, so there's not a lot to play with if you really want to use these (if you're building a plugin and do not want to touch the theme, making you need a filter which isn't there).

However, since you're talking about templates, I'm guessing that you're building a theme. That gives you another option, namely building your own previous/next post link. The instrument for this is get_adjacent_post.

That function will simply give you the previous/next post as an object, leaving you all posibilities to change the permalink with add_query_arg and then build your html around it.

  • I will upvote as soon as I have enough reputation. Thanks a lot, this did the trick. I actually saw that this is the function that previous_post_link is calling internally in the link-template.php file but for some reason I didn't think to try it directly. Thanks again! – Lim Arctan Jun 22 '16 at 20:21
  • Sometimes things are easier than you think ;-) – cjbj Jun 22 '16 at 20:22

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