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I have a number of rewrite rules set which output content correctly however I want to extend this so that the sidebars that appear on that rewritten page can also be amended so that a sidebar is called depending on the query_vars used. Is there anyway to manipulate what is rendered with dynamic_sidebar so we can query the query_vars and choose an appropriate sidebar to display? Or is it a case of wrapping dynamic_sidebar with tests to call the correct sidebar?

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It's hard to tell your exact requirements, but testing to see which handle to pass to dynamic_sidebar is probably your best bet, since it'll allow you to administer each version from the WordPress back-end. Don't forget to register each version with register_sidebar

The other thing that might be what you're after is the sidebars_widgets filter, which lets you edit the global widgets array when it's accessed within dynamic_sidebar.

A sidebar is part of the template applied to the post/page, I can't see any way that changing it directly via a rewrite rule would make sense from a functional perspective.

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  • I was overthinking this I think. What I wanted to achieve is to change the value used by dynamic_sidebar by accessing a filter when this function is called. (Now wondering whether it is worth possibly suggesting a filter to WP Core to amend this value at the beginning of that function) The simplest solution was to just use get_query_var and then call the relevant sidebar. I was trying to avoid overriding the template on which this appears by using a filter.
    – Zakalwe
    Jun 20, 2017 at 12:47
  • What you're describing would normally be done by editing the template. I recently had to dynamically switch sidebars, based on taxonomy, on a theme myself and that was by far the simplest method. From what you're saying, it sounds like you might be taking a very convoluted approach to what you're attempting to do. Perhaps if you amend your question to describe exactly what you want to achieve from end to end?
    – Andrew Dinmore
    Jun 20, 2017 at 17:51
  • Thanks Andrew. I've accepted your answer as I did just end up performing tests before passing an appropriate handle to dynamic_sidebar
    – Zakalwe
    Jun 23, 2017 at 10:13

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