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1. Rebecca Mastey
   Member
   Posted 3 years ago #

   I want to get a list of tags from multiple posts. I see wp_get_post_tags, which accepts a single post ID.

   Does anyone know of any function that will retrieve tags for an array of post IDs? I need to save on queries.

2. Rebecca Mastey
   Member
   Posted 3 years ago #

   In case anyone ever comes across this problem, I found the function in taxonomy.php.

   I was selecting specific categories from the database then looping through them. $term->term_id is the ID of the current category in the loop.

   // Select all the posts in that category
   $posts		=	get_posts(array('category' => $term->term_id));
   $post_ids	=	array();
   
   // iterate through the array returned by get_posts, and add the ids to its own array
   foreach($posts AS $post) {
   	$post_ids[]	=	$post->ID;
   }
   
   // pass the array of post ids to wp_get_object_terms, from taxonomy.php. Also specify that it should return post_tags.
   $tags		=	wp_get_object_terms($ids, 'post_tag');
   $tags_names	=       array();
   
   // iterate through the tags returned by wp_get_object_terms
   // there are other fields available, I just only needed the name
   foreach($tags AS $tag) {
   	$tag_names[]	=	$tag->name;
   }
   
   // create a comma delimited list of tag names
   $tags		=	implode(', ', $tag_names);

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