remove class name from classes rendered by body_class()

In this case, there is no need to remove classes returned from body_class().

In fact, you need to add a class into it using the conditional check is_active_sidebar().

Please see the real example in Twentytwelve ( actually most themes use this same method ), and take it from there.

single single-post postid-1368 single-format-standard logged-in admin-bar custom-background one-column content customize-support instead of this if i have single single-post postid-1368 single-format-standard logged-in admin-bar custom-background two-column content customize-support my problem is solved related to blog content width.

one-column is not a default body_class()output
https://core.trac.www.ads-software.com/browser/tags/3.5.1/wp-includes/post-template.php#L400

This means that the theme you are using already has a function to filter the output of body_class()

yeah, i have set one-column in admired theme setting for the whole site, i need to use two-column for blog posts alone, so is there a way to override the global theme setting and give two-column for blog posts, thanks for your effort…

So the theme is this
https://www.ads-software.com/extend/themes/admired

The function to filter body_class() is this
https://themes.trac.www.ads-software.com/browser/admired/1.2.1/functions.php#L239

You can notice that the mechanism is there already but it uses page template check, if the default doesn’t do what you want, you can extend (make changes to it) or roll your own entirely.

First, make a child theme
https://codex.www.ads-software.com/Child_Themes

in your child’s functions.php you have to remove that function from parent theme first and then make your own function that do the same thing with different conditional checks.

To remove filter from parent is a bit tricky because the order of functions being loaded, so you need to hook it into a proper hook, in this case it’s the after_setup_theme

function my_remove_parents( $classes ) {
	remove_filter( 'body_class', 'admired_body_classes' );
}
add_action( 'after_setup_theme', 'my_remove_parents' );

Then just below that bit, repeat exact same thing as parent’s, but with a function’s name of your own, you can keep the same feature of the parent and just extend it by using OR (||) in the conditional check or make a whole new logic entirely.

is there a way to check if its a page or blog, so i can alter the admired to use two-column in the lines you have mentioned above. can i use!is_page

am new to the wp execution flow, can you suggest in which file i should add the hook add_action(),…

There are lots of ways to check.
https://codex.www.ads-software.com/Conditional_Tags

When you say “blog”, do you mean a single post page ? if so you are looking at is_single(), but if you mean a page that list posts by archive of any kind you are looking at is_archive(), if you mean the main blog home page, then it’s is_home()

thanks for providing all, i meant blog displaying page, that is is_single(). for this if there is no custom template for blog page, what shld be the argument passed. if i use

if ( is_single() )

its returning false.

and in which file(.php) should the hook be added for adding the css class filter function to work.

for this if there is no custom template for blog page, what shld be the argument passed. if i use if ( is_single() ) its returning false.

You can combine the conditional checks with OR (||)

in which file(.php) should the hook be added

all the functions go to functions.php of your child theme.

BTW, the title of this topic doesn’t seem accurate, because you are using a theme that has other mechanism to manage how the sidebar will be loaded too.

To get it work the way you want in the topic’s description, you have to do other thing too, not just filtering the body_class()

If you look into sidebar.php of your parent theme, at the very top you will notice the if check, that’s where you have to apply the same logic used in child’s body_class() filter.

But it’s best to keep 1 topic per 1 issue, so post the new one if needed.

is_page_template ( 'tmp-threecolumn.php' ) in the if() condition prevents the sidebar from loading in sidebar.php. so will try to work on it with filter as you mentioned, then if not done will try posting new.

thanks for the effort, will post the solution once i do and close it so others can get a idea from this.