function delete_terms($attribute_name, $term_taxonomy_id, $parent_id, $meta_data)
{
global $wpdb;
$select_results = $wpdb->get_results("select p.ID as ID from {$wpdb->prefix}posts as p where p.post_parent = {$parent_id} ");
$rows_child_ids = $wpdb->num_rows;
$ids = array();
if ($rows_child_ids > 0) {
foreach ($select_results as $select_result) {
$ids[] = $select_result->ID;
}
$child_ids = implode(",", $ids);
}
$id = $term_taxonomy_id == 'all' ? implode(",", get_attribute_terms($attribute_name, $parent_id)) : $term_taxonomy_id;
$delete_query = "DELETE FROM {$wpdb->prefix}term_relationships where object_id = {$parent_id} and term_taxonomy_id in ( {$id} )";
$delete_result = $wpdb->query($delete_query);
if ($delete_result >= 1) {
if ($term_taxonomy_id != 'all') {
$taxonomy = "pa_" . $attribute_name;
$meta_key = "attribute_" . $taxonomy;
$select = "select t.slug from {$wpdb->prefix}terms as t join {$wpdb->prefix}term_taxonomy as tt on (t.term_id = tt.term_id) where tt.term_taxonomy_id = {$term_taxonomy_id} and tt.taxonomy = '{$taxonomy}' ";
$select_output = $wpdb->get_row($select);
$slug = $select_output->slug;
if ($rows_child_ids > 0) {
$update_query = "UPDATE {$wpdb->prefix}postmeta as pm SET pm.meta_value = '' where pm.meta_key = '{$meta_key}' and pm.meta_value = '{$slug}' and pm.post_id in ( {$child_ids} )";
$update_result = $wpdb->query($update_query);
}
$count_result = $wpdb->get_row("select count(*) as count from {$wpdb->prefix}term_relationships as tr join {$wpdb->prefix}term_taxonomy as tt on (tr.term_taxonomy_id = tt.term_taxonomy_id) where tt.taxonomy = '{$taxonomy}' and tr.object_id = {$parent_id} ");
$count = $count_result->count;
}
// $count < 1 means not a single term exists for that attribute so it should be removed
if ($count < 1 || $term_taxonomy_id == 'all') {
remove_attribute($parent_id, $attribute_name, $child_ids, $meta_data);
}
}
}
public function remove_attribute($tag = 'body', $attribute_name)
{
$this->set_attributes($tag, remove_attribute($this->get_attributes($tag), $attribute_name));
}
/**
* Merges the existing attributes with the new ones
*
* @param array|string $attributes Array of attribute 'name' => 'value' pairs
* or HTML attribute string
* @param array|string $attributes Array of attribute 'name' => 'value' pairs
* or HTML attribute string
*
* @return string A string containing merged attributes
*/
function merge_attributes_and_classes($attributes, $extra_attributes)
{
$attributes = prepare_attributes($attributes);
$extra_attributes = prepare_attributes($extra_attributes);
$class_extra = get_attribute($extra_attributes, 'class');
$attributes = add_class($attributes, get_attribute($extra_attributes, 'class'));
$extra_attributes = remove_attribute($extra_attributes, 'class');
return merge_attributes($attributes, $extra_attributes);
}