categories - Display a list of subcategories a post belongs to

I have this code:

<?php
// List subcategories of category '4'
$subcategories = get_categories('&child_of=4'); 
foreach ($subcategories as $subcategory) {
  echo sprintf(' <a href="%s">%s</a> <span class="sep">•</span>', get_category_link($subcategory->term_id), apply_filters('get_term', $subcategory->name));
}
?>

This code retrieves a list of subcategories from category id 4. I have added this code in post loop(have_posts()). It is showing all tagged subcategories from that category on every post's box.

What I want is to just show the subcategories from the category 4, which is tagged in that post. It shouldn't show all the subcategories from all categories tagged for all the posts.

Thanks in advance

I have this code:

<?php
// List subcategories of category '4'
$subcategories = get_categories('&child_of=4'); 
foreach ($subcategories as $subcategory) {
  echo sprintf(' <a href="%s">%s</a> <span class="sep">•</span>', get_category_link($subcategory->term_id), apply_filters('get_term', $subcategory->name));
}
?>

This code retrieves a list of subcategories from category id 4. I have added this code in post loop(have_posts()). It is showing all tagged subcategories from that category on every post's box.

What I want is to just show the subcategories from the category 4, which is tagged in that post. It shouldn't show all the subcategories from all categories tagged for all the posts.

Thanks in advance

• categories

Share Improve this question edited Jun 9, 2014 at 12:57 Pieter Goosen 55.5k2323 gold badges117117 silver badges211211 bronze badges asked Jun 9, 2014 at 11:08 user57867user57867 122 silver badges44 bronze badges 2

• Your english is a bit broken, making it hard to understand. Do you just want to show posts from category 4 on the homepage? – Pieter Goosen Commented Jun 9, 2014 at 11:26
• @PieterGoosen Sorry for my bad english. i am updated the question. my problem is, It showing all the subcategories tagged in for all posts. i just want to show only the subcategories tagged for that post. see this (prntscr/3r32oy). it is showing all subcategories tagged in for all posts. i just want to show only the subcategories tagged for that post – user57867 Commented Jun 9, 2014 at 11:54

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2 Answers 2

Sorted by: Reset to default 2

Here is a function I've recently used (modified version of the code found in the codex) to display a list of the categories a post is attached to.

This function first gets the parent category to which the post belong, and that info is then fed back into wp_list_categories to remove the parent category and to get a list of the child categories belonging to that parent

<?php 
$taxonomy = 'category';

// get the term IDs assigned to post.
$post_terms = wp_get_object_terms( $post->ID, $taxonomy, array( 'fields' => 'ids' ) );
// separator between links
$separator = ', ';
$categories = get_the_category();
$parentid = $categories[0]->category_parent;

if ( !empty( $post_terms ) && !is_wp_error( $post_terms ) ) {

    $term_ids = implode( ',' , $post_terms );
    $terms = wp_list_categories( 'title_li=&style=none&echo=0&child_of=' . $parentid . '&taxonomy=' . $taxonomy . '&include=' . $term_ids );
    $terms = rtrim( trim( str_replace( '<br />',  $separator, $terms ) ), $separator );

    // display post categories
    echo  $terms;
}
?>

To do so, you should remove the ampersand (which is used to concatenate multiple arguments) and use parent instead of child_of, so that only subcategories (and not deeper-nested categories) are listed:

$subcategories = get_categories( 'parent=4' );