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I need to know how to display only the selected categories per post page..

Example. I am working on a website for movies. I have a category called Genre, then I have sub categories attached to that like comedy, horror etc...

Then I have a category called Availability and sub categories with like, USA, Mexico, England.. etc..

So I'll need to have it set like this per post page.

Genres Action/Adventure, Drama, New Releases

Availability Untied States, England, France

I have this code, but I can't figure out how to separate between genre and Availability

<?php
$categories = get_the_category();
$separator = ' ';
$output = '';
if ( ! empty( $categories ) ) {
    foreach( $categories as $category ) {
        $output .= '<a href="' . esc_url( get_category_link( $category->term_id ) ) . '" alt="' . esc_attr( sprintf( __( 'View all posts in %s', 'textdomain' ), $category->name ) ) . '">' . esc_html( $category->name ) . '</a>' . $separator;
    }
    echo trim( $output, $separator );
} ?>
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If what I understand from your question is correct. You have a post that categorized in multiple categories and subcategories. I have already made the same in a website. use these following code bellow so a sub categories will displayed after the parent category.

//first  part
$allcats = get_the_category();
$parent_id = $all_ids = array();

foreach ($allcats as $cats) {
    //get all category id first
    $all_ids[] = $cats->term_id;

    // get top parent category
    if ($cats->category_parent === 0 ) {
        $parent_id[] =  $cats->term_id;
    }
}

//second part
$separator = ' &raquo; ';
$term_ids = implode( ',' , $all_ids );

$hiearchy_cat  = '';
foreach ($parent_id as $parents) {
    $parent_name    = get_cat_name($parents);
    $parent_link    = get_category_link($parents);
    $parent_cat     = '<span class="parent"><a href="'.$parent_link.'">'.$parent_name.'</a></span>';

    //get all sub category with certain ids
    $child_cats = wp_list_categories(
        array(
        'child_of' =>  $parents, 
        'title_li' => '',
        'style'    => 'none',
        'echo'     => false,
        'taxonomy' => 'category',
        'include'  => $term_ids,

        )
    );
    $child_cats = rtrim( trim( str_replace( '<br />',  $separator, $child_cats ) ), $separator );
    $hiearchy_cat .= '<b>'.$parent_cat.'</b> &raquo; '.$child_cats.'<br>';
}

//last output   
echo $hiearchy_cat;

Hope it helps

  • I'm not too good with php. With your code, could you alter it to display the Childs of "Genre" titled Genre and the childs of "Territories" titles Availability. Is this possible? – Timothy Rooker May 29 '17 at 0:58
  • just try put it in your single.php and it output will be like your question. please let me know if any errors – rheeantz May 29 '17 at 1:11
  • added to single.php added the <?php ?> symbols and nothing happens.. My post pages do not display the sub categories. I'm trying to make it like this example here. summerhillfilms.com/bills-diary If you scroll below the movie synopsis you'll see two sub categories. Genres and Territories. Territories is named Availabilities here. Also I am using SiteOrigin Page Builder on every post page, not sure if that matters. – Timothy Rooker May 29 '17 at 5:16
  • it's a bit weird if that shown nothing. What about replace my code with your existing code in the same place ? – rheeantz May 29 '17 at 5:22
  • I got it working with a different code. Thanks for your help. – Timothy Rooker May 29 '17 at 5:23

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