[Resolved] generate_page_class for parent page + all child pages

[Tina]

Hi,
I’m trying to use this filter to add a page class, but only on a parent page and its child pages. It’s not working, however, is there something wrong with my code?

add_filter( 'generate_page_class', function( $classes ) {
	global $post;

	if ( is_page() && $post->post_parent == '34' ) {
		$classes[] = 'class_name';
		
	}

	return $classes;
	
} );

Note that this is not working either (adding a page class only to home page), so perhaps I’m setting up the conditional wrong in the first place):

add_filter( 'generate_page_class', function( $classes ) {

	if ( is_home() ) {
		$classes[] = 'class_name';
		
	}

	return $classes;
	
} );

Any help greatly appreciated!

Thank you so much.

[David]

Hi there,

can i see the page you’re trying to apply this to ?

[Tina]

Hi David,

working locally right now but I got it to work without the conditional:

function parent_page_class( $classes ) {
	global $post;

	$parent_slug = get_post_field( 'post_name', $post->post_parent );
    $classes[] = $parent_slug;

	return $classes;
}
add_filter( 'generate_page_class', 'parent_page_class' );

Still don’t know why the first one wouldn’t work but this is better imo..

Thanks for the quick response!

[Tina]

(for anybody reading: wordpress already has a parent page ID body class, so my solution is kind of redundant, I was hoping to somehow write a universal solution for a multilingual site but it’s not working as expected. well. at least here’s the code for anyone who finds it useful)

[David]

Yeah, thats a handy way to do it – or as you said you can filter it down from the body if needed.

Glad to see you got it working and thanks for sharing the solution!!

[Author]

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