[Resolved] Hide header and footer dynamically based on query parameters

Thank you Elvin!

I would like to ask if it would be possible to not have to create a layout Element and to also not require an ID, since this doesn’t make it scalable and I would like to add this functionality for all my clients.

Is there another filter that I could use to enable/disable page elements?

In each page configuration we have can disable specific elements for that page under Page > Layout > Disable Elements. Don’t we have a filter for these options that are set on each page?

Elvin, although there is a generate_header hook, there is no generate_footer hook: https://docs.generatepress.com/collection/hooks/

The header disappears now when using the parameter, but not the footer.

This is my code:

// Add the ability to hide elements when a "landing" query string is present.
function dynamic_landing_pages ()
{
    if ( isset( $_GET['landing'] ) && $_GET['landing'] == true )
    {
        remove_action( 'generate_header', 'generate_construct_header');
        remove_action( 'generate_footer', 'generate_construct_footer' );
    }
}
add_action( 'after_setup_theme','dynamic_landing_pages' );

Hi Leo,

It seems that the documentation needs to be updated then.

In any case, replacing after_setup_theme with wp made no change.

In both cases the footer bar disappears, but not the footer widgets area.

Hi Leo,

I’ve updated my code to the following:

// Add the ability to hide elements when a "landing" query string with true value is present.
function dynamic_landing_pages ()
{
    if ( isset( $_GET['landing'] ) && $_GET['landing'] == true )
    {
        remove_action( 'generate_header', 'generate_construct_header' );
        remove_action( 'generate_footer', 'generate_construct_footer' );
        remove_action( 'generate_footer', 'generate_construct_footer_widgets' );
    }
}
add_action( 'after_setup_theme','dynamic_landing_pages' );

And it still doesn’t hide the footer widgets area. I’ve also tried again with wp instead of after_setup_theme but it made no difference, it also doesn’t work.

How can I make the footer widgets area disappear inside this function?

Hi Elvin,

It works, you can check it by opening the URLs I’ve provided as private information in the previous reply. You will see that without the parameter the page loads with header and footer, while with parameter, the header and footer bar disappear (not yet the footer widget area).

In fact, I’m using a loose comparison (==) and not a strict one (===), so both true and 1 values are true. With the same provided link, you can try to change the ?landing=1 to ?landing=0 and then the header will appear again, since 0 would mean false.

That is not the issue, and we do still need to find the right hook or filter to hide the footer widgets area (without depending on IDs, since this code should be made to work on any website using GeneratePress).

Thanks,
Gerard

Done, this is code now:

// Add the ability to hide elements when a "landing" query string with true value is present.
function dynamic_landing_pages ()
{
    if ( isset( $_GET['landing'] ) && $_GET['landing'] == true )
    {
        remove_action( 'generate_header', 'generate_construct_header' );
        remove_action( 'generate_footer', 'generate_construct_footer' );
        remove_action( 'generate_footer', 'generate_construct_footer_widgets', 5 );
    }
}
add_action( 'after_setup_theme','dynamic_landing_pages' );

Yet, the footer widgets area continues to appear. I have also tried lowering and increasing the priority number, but again it made no difference.