[Support request] filter php to show blog post by category without header, navigation and footer

[Cristiana]

Hey there! 🙂
I need to create a category filter that only shows posts from that category with no header, navigation bar or footer.

This is the result to be obtained.
https://magazine.dooid.it/vicinanze/toscana/

Other than that.. I need to create a filter that recall a specific post through the post id. Also without showing header, navigation bar or footer.

this is the example.
https://magazine.dooid.it/segnalazione/36126/

Thank you for the time and the help!

[David]

Hi there,

does it have to be a PHP Snippet?
As you can do it with the GP layout element:

https://docs.generatepress.com/article/layout-element-overview/

Let me know.

[Cristiana]

I think that this isn’t the right solution for me.
I need the filter only when I go to invoke it in the url. I don’t want this to be a general rule and always present on my site.

[David]

What would be special about that URL? eg. a URL Parameter.

If so, then you could:

1. create the Layout Element, and use that to disable the header etc.
2. But DO NOT set the Display Rules
3. Then use the generate_element_display filter to display that element when a custom condition is met, such as checking for a URL param:

add_filter( 'generate_element_display', function( $display, $element_id ) {
    if ( 99 === $element_id && isset( $_GET['your-url-param'] ) ) {
        $display = true;
    }

    return $display;
}, 10, 2 );

Let me know.

[Cristiana]

Thanks for your answer.
I’ll try to explain better the situation.

The special thing about the link https://magazine.dooid.it/vicinanze/toscana/ is that by inserting the parameter “vicinanze” and changing “toscana” which is a category, it shows the category archive without header and footer.
By clicking on the articles shown in this list, they are presented without header and footer,too.

————-
2nd necessity

In the link https://magazine.dooid.it/segnalazione/36126/
we have more or less the same functioning.

“Segnalazione” is the parameter that allows you to see a certain article without foot and head.
“36126” instead is the post ID directly of the article.

As I said I don’t need this rule to display on the whole site, but only when clicking on these links.

Thanks

[Fernando]

Hi Cristiana,

It’s the same concept. The parameter is just added after.

In this way, no extra code is needed.

So, the example link would now be something like this with David’s code: https://magazine.dooid.it/toscana/?your-url-param

You can replace your-url-param with anything you prefer.

[Cristiana]

thanks for your patience and help.
I’m a beginner with these things.
I created the layout element as David suggested.
but where should i put the code?

[David]

The code is a PHP Snippet, this doc explains:

https://docs.generatepress.com/article/adding-php/

[Cristiana]

Unfortunately I don’t understand what I have to do.

I had already read the guide you sent me, but I can’t apply it on the site.

Is it possible to organize a video call with screen sharing?

[Fernando]

Sorry, we don’t offer video calls or screen sharing for our support service.

What exact step did you take to add it?

If you haven’t tried, can you install the plugin Code Snippets: https://wordpress.org/plugins/code-snippets/

1. In your Admin dashboard, go to Snippets > Add new.

2. Add your code and set it to “Run snippet everywhere”.

3. Click on “Save changes and activate”.

[Cristiana]

Ok fine.
I downloaded the plugin as you told me, did the following steps you mentioned and added the code david suggested.

and then?

thanks for your patience and help 🙂

[David]

1. Edit your Layout Element, and in the browser URL bar you will see the url, it will look something like this:

yourdomain.com/wp-admin/post.php?post=202&action=edit

The 202 is the ID, look for the ID of your Element and make a note of it.

Then in the code snippet – for reference:

add_filter( 'generate_element_display', function( $display, $element_id ) {
    if ( 99 === $element_id && isset( $_GET['your-url-param'] ) ) {
        $display = true;
    }

    return $display;
}, 10, 2 );

Where there is the 99 replace that with Element ID.

Then where it says: $_GET['your-url-param'] change the your-url-param for the parameter you want to use to activate the layout.

[Cristiana]

Thank you for the guide step by step.
I’ve just done these things. And now?

[David]

You should now be able to use the link with the URL Param to make that work.

[Author]

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