How to display taxonomy parent for selected taxonomy - php

Question

I want to show on the site the parent of the selected taxonomy. For that I have the above code but the problem with this is that it is showing all the selected taxonomy in a list with now structure.
global $post;
$features = get_the_terms( $post->ID, 'property-feature' );
if ( !empty( $features ) && is_array( $features ) && !is_wp_error( $features ) ) {
?>
<div class="property-features">
<?php
global $inspiry_options;
$property_features_title = $inspiry_options[ 'inspiry_property_features_title' ];
if( !empty( $property_features_title ) ) {
?><h4 class="fancy-title"><?php echo esc_html( $property_features_title ); ?></h4><?php
}
?>
<ul class="property-features-list clearfix">
<?php
foreach( $parent_term as $single_feature ) {
echo '<li>'. $single_feature->name . '</li>';
}
?>
</ul>
</div>
<?php
}
Example:
Parent: option 1, option 2
Parent 2 : option 3, option 4
If I select option 2 and option 3 I want to see
Parent: option 2
Parent 2 : option 3
Updare 2
global $post;
$features = get_the_terms( $post->ID, 'property-feature' );
$featuresss = get_the_terms( $post->ID, 'property-feature' );
// determine the topmost parent of a term
function get_term_top_most_parent($term_id, $taxonomy){
// start from the current term
$parent = get_term_by( 'id', $term_id, $taxonomy);
// climb up the hierarchy until we reach a term with parent = '0'
while ($parent->parent != '0'){
$term_id = $parent->parent;
$parent = get_term_by( 'id', $term_id, $taxonomy);
}
return $parent;
}
// so once you have this function you can just loop over the results returned by wp_get_object_terms
function hey_top_parents($taxonomy, $results = 1) {
// get terms for current post
$terms = wp_get_object_terms( get_the_ID(), $taxonomy );
$y = get_the_terms($terms->term_id, $taxonomy);
// set vars
$top_parent_terms = array();
foreach ( $terms as $term ) {
//get top level parent
$top_parent = get_term_top_most_parent( $term->term_id, $taxonomy );
//check if you have it in your array to only add it once
if ( !in_array( $top_parent, $top_parent_terms ) ) {
$top_parent_terms[] = $top_parent;
}
}
// build output (the HTML is up to you)
foreach( $top_parent_terms as $single_feature ) {
echo '<li>'. $single_feature->name . '</li>';
foreach( $terms as $single ) {
echo '<ul><li>'. $single->name . '</li></ul>';
}
}
//return $top_parent_terms;
}
I managed to display the top parent for the selected taxonomy but now the problem is that I need now to display in the top parent anly the selected taxonomy from that parent

Answer 1

global $post;
$taxonomy = "property-feature";
// determine the topmost parent of a term
function get_term_top_most_parent($term_id, $taxonomy){
// start from the current term
$parent = get_term_by( 'id', $term_id, $taxonomy);
// climb up the hierarchy until we reach a term with parent = '0'
while ($parent->parent != '0'){
$term_id = $parent->parent;
$parent = get_term_by( 'id', $term_id, $taxonomy);
}
return $parent;
}
// so once you have this function you can just loop over the results returned by wp_get_object_terms
function hey_top_parents($taxonomy, $results = 1) {
// get terms for current post
$terms = wp_get_object_terms( get_the_ID(), $taxonomy );
// set vars
$top_parent_terms = array();
foreach ( $terms as $term ) {
//get top level parent
$top_parent = get_term_top_most_parent( $term->term_id, $taxonomy );
//check if you have it in your array to only add it once
if ( !in_array( $top_parent, $top_parent_terms ) ) {
$top_parent_terms[] = $top_parent;
}
}
// build output (the HTML is up to you)
foreach( $top_parent_terms as $single_feature )
{
echo '<li>'. $single_feature->name . '</li>';
foreach( $terms as $single ) {
if( $single_feature->term_id == $single->parent ) {
echo '<ul><li>'. $single->name . '</li></ul>';
}
}
}
//return $top_parent_terms;
}
CHANGES:
1) Moved taxonomy name to variable (used in echo's).
$taxonomy = "property-feature";
2) Added if condition to the code responsible for displaying sub terms.
if( $single_feature->term_id == $single->parent ) {
echo '<ul><li>'. $single->name . '</li></ul>';
}
REMOVED (not used lines of codes):
1)
$features = get_the_terms( $post->ID, 'property-feature' );
$featuresss = get_the_terms( $post->ID, 'property-feature' );
2)
$y = get_the_terms($terms->term_id, $taxonomy);
CONSIDER:
1) Removing $results variable from:
function hey_top_parents($taxonomy, $results = 1) {
it is not used anywhere or maybe should be to determine if results should be returned or displayed by the function.