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In my default WordPress post type, I have a custom field that is named template, which can have a value of either blog or music.

I want to rewrite the permalink to be something like %music/my-song where my-song would be the name of the post.

I changed the permalink settings to custom structure /%template%/%postname%/.

I've added a post_link filter to update the template in the link:

add_filter('post_link', function($link, $post = null){

    if($post && ($template = get_field($template, $post->ID)))
        return str_replace('%template%', $template, $link);

    return $link;

});

I also added a rewrite tag for WordPress to detect the template:

add_rewrite_tag('%template%', '([^/]+', 'template=');

Once I save the permalinks, every thing seems to be working for my posts. However, when I try to access a page, it doesn't work.

For example, my contact page's permalink is /contact, and instead of displaying the contact page itself, it shows the home page.

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  • Possible duplicate of How to create custom URL routes?
    – admcfajn
    Commented Aug 30, 2017 at 21:17
  • It's funny that it even works at all, you forgot to set the number of arguments to the filter (eg: add_filter('post_link', function, 10, 2) )
    – Tofandel
    Commented Nov 29, 2019 at 17:39

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