Adding a category to all posts that currently have a specific category

Yes. You can create a script on you functions.php that will loop through all the posts that has marriage category and add the category relationship.

LOL, easy as that huh?

Can someone actually help with a script or plugin? I have no idea how to create such a thing.

Hi,

You could use this PHP Script in your functions.php

add_action('init','add_relationship_category');

// Loop Posts through Marriage category and add Relationship category for each post
function add_relationship_category () {
	
	$args = array (
    'cat' => array(16), // category id for 'Marriage' which you get by hovering over 'Edit' in 'Posts' => 'Categories' page
    'posts_per_page' => -1, 
);

$cat_posts = new WP_Query($args);
$post_category = 51; // 'Relationship' category id 

if ($cat_posts->have_posts()) : while ($cat_posts->have_posts()) : $cat_posts->the_post();
wp_set_post_categories( get_the_ID(), $post_category, 'true' ); 
endwhile; endif;

}

And after it works, you can remove the code. ( it only need to work one time )

• This reply was modified 6 years, 8 months ago by Abdul Samad.
• This reply was modified 6 years, 8 months ago by Abdul Samad.

Yeah. Try @abdul-samad-k-t script.

Just change the WP_query to WP_Query

@necafasu Thanks! I updated the code.