Redirect all post into some category to url without category

Question

I need to redirect about 200 post into category "ricette","svezzamento" and "alimentazione" to url without category. I have this code but not work.

add_action('template_redirect', 'post_redirect_by_custom_filters');

function post_redirect_by_custom_filters() {

global $post;
$catArray = ['ricette','svezzamento','alimentazione'];
if (is_single($post->ID) && has_category($catArray, $post){ 

    $new_url = "https://www.example.com/{$post->post_name}/";
    wp_redirect($new_url, 301);
    exit;
}
}

Answer 1

Assuming your URLs are of the form /<category>/<post-name>/ (trailing slash optional) then an .htaccess only solution would look something like the following, at the top of your .htaccess file:

# Remove some categories from the URL
RewriteRule ^(ricette|svezzamento|alimentazione)/([^/]+)/?$ /$2/ [R=301,L]

The $2 backreference (in the RewriteRule substitution) matches the <post-name> from the requested URL.

It is preferable to first test with 302 (temporary) redirects in order to avoid potential caching issues.

https://www.example.com/la-crescita/ricette/name-post and I need go to https://www.example.com/name-post

yes "la-crescita" is the first category and "ricette" is the subcategory of "la-crescita". File .htaccess is in the root of WordPress

If /la-crescita is always the main category and "ricette", "svezzamento" and "alimentazione" and subcategories of this main category then you need to modify the above directive to include the category. For example:

RewriteRule ^la-crescita/(ricette|svezzamento|alimentazione)/([^/]+)/?$ /$2/ [R=301,L]

Answer 2

You need to update site permalink structure from "/%category%/%postname%/" to "/%postname%/".

To update the permalinks Goto: Settings > Permalink