OwlCyberSecurity - MANAGER

Edit File: class-breadcrumb.php

<?php
if ( ! defined( 'ABSPATH' ) ) { exit; } // Exit if accessed directly

if( ! class_exists( 'avia_breadcrumb' ) )
{
	class avia_breadcrumb
	{
		var $options;

function __construct($options = "")
	{

$this->options = array( 	//change this array if you want another output scheme
		'before' => ' ',
		'after' => ' ',
		'delimiter' => '&raquo;'
		);

if(is_array($options))
		{
			$this->options = array_merge($this->options, $options);
		}

$markup = $this->options['before'].$this->options['delimiter'].$this->options['after'];

global $post;
		echo ''.__('You are here:','avia_framework').' <a href="'.get_bloginfo('url').'">';
			bloginfo('name');
			echo "</a>";
			if(!is_front_page()){echo $markup;}

$output = $this->simple_breadcrumb_case($post);

echo "";
			if ( is_page() || is_single()) {
			the_title();
			}else{
			echo $output;
			}
			echo " ";
		}

function simple_breadcrumb_case($der_post)
		{
			global $post;

$markup = $this->options['before'].$this->options['delimiter'].$this->options['after'];
			if (is_page()){
				 if($der_post->post_parent) {
					 $my_query = get_post($der_post->post_parent);
					 $this->simple_breadcrumb_case($my_query);
					 $link = '<a href="';
					 $link .= get_permalink($my_query->ID);
					 $link .= '">';
					 $link .= ''. get_the_title($my_query->ID) . '</a>'. $markup;
					 echo $link;
				 }
			return;
			}

if(is_single())
		{
			$category = get_the_category();
			if (is_attachment()){

$my_query = get_post($der_post->post_parent);
				$category = get_the_category($my_query->ID);

if(isset($category[0]))
				{
					$ID = $category[0]->cat_ID;
					$parents = get_category_parents( $ID, true, $markup, false );
					if(!is_object($parents)) echo $parents;
					previous_post_link("%link $markup");
				}

}else{

$postType = get_post_type();

if($postType == 'post')
				{
					$ID = $category[0]->cat_ID;
					echo get_category_parents( $ID, true, $markup, false );
				}
				else if($postType == 'portfolio')
				{
					$terms = get_the_term_list( $post->ID, 'portfolio_entries', '', '$$$', '' );
					$terms = explode('$$$',$terms);
					echo $terms[0].$markup;

}
			}
		return;
		}

if(is_tax()){
			  $term = get_term_by( 'slug', get_query_var( 'term' ), get_query_var( 'taxonomy' ) );
			  return $term->name;

}

if(is_category()){
			$category = get_the_category();
			$i = $category[0]->cat_ID;
			$parent = $category[0]-> category_parent;

if($parent > 0 && $category[0]->cat_name == single_cat_title( "", false ) ){
				echo get_category_parents( $parent, true, $markup, false );
			}
		return single_cat_title( '', false );
		}

if(is_author()){
			$curauth = get_userdatabylogin(get_query_var('author_name'));
			return "Author: ".$curauth->nickname;
		}
		if(is_tag()){ return "Tag: " . single_tag_title( '', false ); }

if(is_404()){ return __("404 - Page not Found",'avia_framework'); }

if(is_search()){ return __("Search",'avia_framework');}

if(is_year()){ return get_the_time('Y'); }

if(is_month()){
		$k_year = get_the_time('Y');
		echo "<a href='".get_year_link($k_year)."'>".$k_year."</a>".$markup;
		return get_the_time('F'); }

if(is_day() || is_time()){
		$k_year = get_the_time('Y');
		$k_month = get_the_time('m');
		$k_month_display = get_the_time('F');
		echo "<a href='".get_year_link($k_year)."'>".$k_year."</a>".$markup;
		echo "<a href='".get_month_link($k_year, $k_month)."'>".$k_month_display."</a>".$markup;

return get_the_time('jS (l)'); }

}

}
}

/*-----------------------------------------------------------------------------------*/
/* avia_breadcrumbs() - Custom breadcrumb generator function  */
/*
/* Params:
/*
/* Arguments Array:
/*
/* 'separator' 			- The character to display between the breadcrumbs.
/* 'before' 			- HTML to display before the breadcrumbs.
/* 'after' 				- HTML to display after the breadcrumbs.
/* 'front_page' 		- Include the front page at the beginning of the breadcrumbs.
/* 'show_home' 			- If $show_home is set and we're not on the front page of the site, link to the home page.
/* 'echo' 				- Specify whether or not to echo the breadcrumbs. Alternative is "return".
/* 'show_posts_page'	- If a static front page is set and there is a posts page, toggle whether or not to display that page's tree.
/*
/*-----------------------------------------------------------------------------------*/

/**
 * The code below is an inspired/modified version by woothemes breadcrumb function which in turn is inspired by Justin Tadlock's Hybrid Core :)
 */

function avia_breadcrumbs( $args = array() ) 
{
	global $wp_query, $wp_rewrite;

/* Create an empty variable for the breadcrumb. */
	$breadcrumb = '';

/* Create an empty array for the trail. */
	$trail = array();
	$path = '';

/* Set up the default arguments for the breadcrumb. */
	$defaults = array(
					'separator'		=> '&raquo;',
					'before'		=> '' . __( 'You are here:', 'avia_framework' ) . '',
					'after'			=> false,
					'front_page'	=> true,
					'show_home'		=> __( 'Home', 'avia_framework' ),
					'echo'			=> false,
					'show_categories'	=> true,
					'show_posts_page'	=> true,
					'truncate'		=> 70,
					'richsnippet'	=> false
				);

/* Allow singular post views to have a taxonomy's terms prefixing the trail. */
	if ( is_singular() )
	{
		$defaults["singular_{$wp_query->post->post_type}_taxonomy"] = false;
	}

/* Apply filters to the arguments. */
	$args = apply_filters( 'avia_breadcrumbs_args', $args );

/* Parse the arguments and extract them for easy variable naming. */
	extract( wp_parse_args( $args, $defaults ) );

/* If $show_home is set and we're not on the front page of the site, link to the home page. */
	if ( !is_front_page() && $show_home )
		$trail[] = '<a href="' . home_url() . '" title="' . esc_attr( get_bloginfo( 'name' ) ) . '" rel="home" class="trail-begin">' . $show_home . '</a>';

/* If viewing the front page of the site. */
	if ( is_front_page() ) 
	{
		if ( !$front_page )
			$trail = false;
		elseif ( $show_home )
			$trail['trail_end'] = "{$show_home}";
	}

/* If viewing the "home"/posts page. */
	elseif ( is_home() ) 
	{
		$home_page = get_post( $wp_query->get_queried_object_id() );
		$trail = array_merge( $trail, avia_breadcrumbs_get_parents( $home_page->post_parent, '' ) );
		$trail['trail_end'] = get_the_title( $home_page->ID );
	}

/* If viewing a singular post (page, attachment, etc.). */
	elseif ( is_singular() ) 
	{

/* Get singular post variables needed. */
		$post = $wp_query->get_queried_object();
		$post_id = absint( $wp_query->get_queried_object_id() );
		$post_type = $post->post_type;
		$parent = $post->post_parent;

/* If a custom post type, check if there are any pages in its hierarchy based on the slug. */
		if ( 'page' !== $post_type && 'post' !== $post_type ) {

$post_type_object = get_post_type_object( $post_type );

/* If $front has been set, add it to the $path. */
			if ( 'post' == $post_type || 'attachment' == $post_type || ( $post_type_object->rewrite['with_front'] && $wp_rewrite->front ) )
				$path .= trailingslashit( $wp_rewrite->front );

/* If there's a slug, add it to the $path. */
			if ( !empty( $post_type_object->rewrite['slug'] ) )
				$path .= $post_type_object->rewrite['slug'];

/* If there's a path, check for parents. */
			if ( !empty( $path ) )
				$trail = array_merge( $trail, avia_breadcrumbs_get_parents( '', $path ) );

/* If there's an archive page, add it to the trail. */
			if ( !empty( $post_type_object->has_archive ) && function_exists( 'get_post_type_archive_link' ) )
				$trail[] = '<a href="' . get_post_type_archive_link( $post_type ) . '" title="' . esc_attr( $post_type_object->labels->name ) . '">' . $post_type_object->labels->name . '</a>';
		}

/* try to build a generic taxonomy trail no matter the post type and taxonomy and terms
		$currentTax = "";
		foreach(get_taxonomies() as $tax)
		{
			$terms = get_the_term_list( $post_id, $tax, '', '$$$', '' );
			echo"<pre>";
			print_r($tax.$terms);
			echo"</pre>";
		}
		*/

/* If the post type path returns nothing and there is a parent, get its parents. */
		if ( empty( $path ) && 0 !== $parent || 'attachment' == $post_type )
			$trail = array_merge( $trail, avia_breadcrumbs_get_parents( $parent, '' ) );

/* Toggle the display of the posts page on single blog posts. */
		if ( 'post' == $post_type && $show_posts_page == true && 'page' == get_option( 'show_on_front' ) ) {
			$posts_page = get_option( 'page_for_posts' );
			if ( $posts_page != '' && is_numeric( $posts_page ) ) {
				$trail = array_merge( $trail, avia_breadcrumbs_get_parents( $posts_page, '' ) );
			}
		}

if('post' == $post_type && $show_categories)
 {
 $category = get_the_category();
				
 foreach($category as $cat)
 {
 if(!empty($cat->parent))
 {
 $parents = get_category_parents( $cat->cat_ID, true, '$$$', false );
 $parents = explode("$$$", $parents);
 foreach ($parents as $parent_item)
 {
 if($parent_item) $trail[] = $parent_item;
 }
 break;
 }
 }
 
 if(isset($category[0]) && empty($parents))
 {
 	$trail[] = '<a href="'.get_category_link($category[0]->term_id ).'">'.$category[0]->cat_name.'</a>';
 }
 
 }

if($post_type == 'portfolio')
		{
			$parents = get_the_term_list( $post_id, 'portfolio_entries', '', '$$$', '' );
			$parents = explode('$$$',$parents);
			foreach ($parents as $parent_item)
			{
				if($parent_item) $trail[] = $parent_item;
			}
		}

/* Display terms for specific post type taxonomy if requested. */
		if ( isset( $args["singular_{$post_type}_taxonomy"] ) && $terms = get_the_term_list( $post_id, $args["singular_{$post_type}_taxonomy"], '', ', ', '' ) )
			$trail[] = $terms;

/* End with the post title. */
		$post_title = get_the_title( $post_id ); // Force the post_id to make sure we get the correct page title.
		if ( !empty( $post_title ) )
			$trail['trail_end'] = $post_title;

}

/* If we're viewing any type of archive. */
	elseif ( is_archive() ) 
	{

/* If viewing a taxonomy term archive. */
		if ( is_tax() || is_category() || is_tag() ) 
		{

/* Get some taxonomy and term variables. */
			$term = $wp_query->get_queried_object();
			$taxonomy = get_taxonomy( $term->taxonomy );

/* Get the path to the term archive. Use this to determine if a page is present with it. */
			if ( is_category() )
				$path = get_option( 'category_base' );
			elseif ( is_tag() )
				$path = get_option( 'tag_base' );
			else 
			{
				if ( $taxonomy->rewrite['with_front'] && $wp_rewrite->front )
					$path = trailingslashit( $wp_rewrite->front );
				$path .= $taxonomy->rewrite['slug'];
			}

/* Get parent pages by path if they exist. */
			if ( $path )
				$trail = array_merge( $trail, avia_breadcrumbs_get_parents( '', $path ) );

/* If the taxonomy is hierarchical, list its parent terms. */
			if ( is_taxonomy_hierarchical( $term->taxonomy ) && $term->parent )
				$trail = array_merge( $trail, avia_breadcrumbs_get_term_parents( $term->parent, $term->taxonomy ) );

/* Add the term name to the trail end. */
			$trail['trail_end'] = $term->name;
		}

/* If viewing a post type archive. */
		elseif ( function_exists( 'is_post_type_archive' ) && is_post_type_archive() ) 
		{

/* Get the post type object. */
			$post_type_object = get_post_type_object( get_query_var( 'post_type' ) );

/* If $front has been set, add it to the $path. */
			if ( $post_type_object->rewrite['with_front'] && $wp_rewrite->front )
				$path .= trailingslashit( $wp_rewrite->front );

/* If there's a slug, add it to the $path. */
			if ( !empty( $post_type_object->rewrite['archive'] ) )
				$path .= $post_type_object->rewrite['archive'];

/* If there's a path, check for parents. */
			if ( !empty( $path ) )
				$trail = array_merge( $trail, avia_breadcrumbs_get_parents( '', $path ) );

/* Add the post type [plural] name to the trail end. */
			$trail['trail_end'] = $post_type_object->labels->name;
		}

/* If viewing an author archive. */
		elseif ( is_author() ) 
		{

/* If $front has been set, add it to $path. */
			if ( !empty( $wp_rewrite->front ) )
			{
				$path .= trailingslashit( $wp_rewrite->front );
			}

/* If an $author_base exists, add it to $path. */
			if ( !empty( $wp_rewrite->author_base ) )
			{
				$path .= $wp_rewrite->author_base;
			}

/* If $path exists, check for parent pages. */
			if ( ! empty( $path ) )
			{
				$trail = array_merge( $trail, avia_breadcrumbs_get_parents( '', $path ) );
			}

/* Add the author's display name to the trail end. */
			$trail['trail_end'] =  apply_filters( 'avf_author_name', get_the_author_meta('display_name', get_query_var('author')), get_query_var('author'));
		}

/* If viewing a time-based archive. */
		elseif ( is_time() ) 
		{

if ( get_query_var( 'minute' ) && get_query_var( 'hour' ) )
			{
				$trail['trail_end'] = get_the_time( __( 'g:i a', 'avia_framework' ) );
			}
			elseif ( get_query_var( 'minute' ) )
			{
				$trail['trail_end'] = sprintf( __( 'Minute %1$s', 'avia_framework' ), get_the_time( __( 'i', 'avia_framework' ) ) );
			}
			elseif ( get_query_var( 'hour' ) )
			{
				$trail['trail_end'] = get_the_time( __( 'g a', 'avia_framework' ) );
			}
		}

/* If viewing a date-based archive. */
		elseif ( is_date() ) 
		{

/* If $front has been set, check for parent pages. */
			if ( $wp_rewrite->front )
			{
				$trail = array_merge( $trail, avia_breadcrumbs_get_parents( '', $wp_rewrite->front ) );
			}

if ( is_day() ) 
			{
				$trail[] = '<a href="' . get_year_link( get_the_time( 'Y' ) ) . '" title="' . get_the_time( esc_attr__( 'Y', 'avia_framework' ) ) . '">' . get_the_time( __( 'Y', 'avia_framework' ) ) . '</a>';
				$trail[] = '<a href="' . get_month_link( get_the_time( 'Y' ), get_the_time( 'm' ) ) . '" title="' . get_the_time( esc_attr__( 'F', 'avia_framework' ) ) . '">' . get_the_time( __( 'F', 'avia_framework' ) ) . '</a>';
				$trail['trail_end'] = get_the_time( __( 'j', 'avia_framework' ) );
			}

elseif ( get_query_var( 'w' ) ) 
			{
				$trail[] = '<a href="' . get_year_link( get_the_time( 'Y' ) ) . '" title="' . get_the_time( esc_attr__( 'Y', 'avia_framework' ) ) . '">' . get_the_time( __( 'Y', 'avia_framework' ) ) . '</a>';
				$trail['trail_end'] = sprintf( __( 'Week %1$s', 'avia_framework' ), get_the_time( esc_attr__( 'W', 'avia_framework' ) ) );
			}

elseif ( is_month() ) 
			{
				$trail[] = '<a href="' . get_year_link( get_the_time( 'Y' ) ) . '" title="' . get_the_time( esc_attr__( 'Y', 'avia_framework' ) ) . '">' . get_the_time( __( 'Y', 'avia_framework' ) ) . '</a>';
				$trail['trail_end'] = get_the_time( __( 'F', 'avia_framework' ) );
			}

elseif ( is_year() ) 
			{
				$trail['trail_end'] = get_the_time( __( 'Y', 'avia_framework' ) );
			}
		}
	}

/* If viewing search results. */
	elseif ( is_search() )
	{
		$trail['trail_end'] = sprintf( __( 'Search results for &quot;%1$s&quot;', 'avia_framework' ), esc_attr( get_search_query() ) );
	}
	
	/* If viewing a 404 error page. */
	elseif ( is_404() )
	{
		$trail['trail_end'] = __( '404 Not Found', 'avia_framework' );
	}

/* Allow child themes/plugins to filter the trail array. */
	$trail = apply_filters( 'avia_breadcrumbs_trail', $trail, $args );
	
	/**
	 * Allow to filter trail to return unique links only (href and text)
	 * 
	 * @since 4.3.2
	 * @param boolean
	 * @param mixed|array $trail
	 * @return mixed|true
	 */
	if( true === apply_filters( 'avf_breadcrumb_trail_unique', true, $trail ) )
	{
		$trail = avia_make_unique_breadcrumbs( $trail );
	}

/* Connect the breadcrumb trail if there are items in the trail. */
	if ( is_array( $trail ) ) 
	{
		$el_tag = 'span';
		
		$markup_list = ' itemscope="itemscope" itemtype="https://schema.org/BreadcrumbList" ';
		$markup_item = ' itemscope="itemscope" itemtype="https://schema.org/ListItem" itemprop="itemListElement" ';

$vocabulary = '';		//	can be removed ( - see below )
		
		//google rich snippets
		if( $richsnippet === true )
		{
//				removed 4.7.2.1 as google will deprecate data-vocabulary
//				https://meetanshi.com/blog/fix-data-vocabulary-org-schema-deprecated-error/
//				https://github.com/KriesiMedia/wp-themes/issues/2650
//				
//			if( is_ssl() )
//			{
//				$vocabulary = 'xmlns:v="https://rdf.data-vocabulary.org/#"';    
//			}
//			else
//			{
//				$vocabulary = 'xmlns:v="http://rdf.data-vocabulary.org/#"';
//			}
		}

/* Open the breadcrumb trail containers. */
		$breadcrumb = '<div class="breadcrumb breadcrumbs avia-breadcrumbs"><div class="breadcrumb-trail" ' . $vocabulary . '>';

/* If $before was set, wrap it in a container. */
		if ( ! empty( $before ) )
		{
			$breadcrumb .= '<' . $el_tag . ' class="trail-before">' . $before . '</' . $el_tag . '> ';
		}

/* Wrap the $trail['trail_end'] value in a container. */
		if ( ! empty( $trail['trail_end'] ) )
		{
			if( ! is_search() )
			{
				$trail['trail_end'] = avia_backend_truncate( $trail['trail_end'], $truncate, " ", $pad="...", false, '', true );
			}
			$trail['trail_end'] = '<' . $el_tag . ' class="trail-end">' . $trail['trail_end'] . '</' . $el_tag . '>';
		}

if( $richsnippet === true )
		{
			$position = 0;
			foreach( $trail as $key => &$link )
			{
				if( 'trail_end' === $key ) 
				{
					continue;
				}

//				$link = preg_replace( '!rel=".+?"|rel=\'.+?\'|!', '', $link );
//				$link = str_replace( '<a ', '<a rel="v:url" property="v:title" ', $link );	// removed 4.7.2.1
//				$link = ''.$link.''; //removed due to data testing error
				
				$position ++;
				
				$matches = array();
				preg_match( "/<a ?.*>(.*)<\/a>/", $link, $matches );
				
				$link_text = ! empty( $matches[1] ) ? $matches[1] : '';
				$anchor = str_replace( $link_text . '</a>', '', $link );
				$anchor = str_replace( '<a ', '<a itemprop="url" ', $anchor );
						
				$new_link = '';
				$new_link .=	'';
				$new_link .=		$anchor;
				$new_link .=			'' . $link_text . '';
				$new_link .=		'</a>';
				$new_link .=		'' . $position . '';
				$new_link .=	'';
				$new_link .= '';
				
				$link = $new_link;
			}
		}

/* Format the separator. */
		if ( ! empty( $separator ) )
		{
			$separator = '' . $separator . '';
		}
		
		/* Join the individual trail items into a single string. */
		$breadcrumb .= join( " {$separator} ", $trail );

/* If $after was set, wrap it in a container. */
		if ( ! empty( $after ) )
		{
			$breadcrumb .= ' ' . $after . '';
		}

/* Close the breadcrumb trail containers. */
		$breadcrumb .= '</div></div>';
	}

/* Allow developers to filter the breadcrumb trail HTML. */
	$breadcrumb = apply_filters( 'avia_breadcrumbs', $breadcrumb );

/* Output the breadcrumb. */
	if ( $echo )
	{
		echo $breadcrumb;
	}
	else
	{
		return $breadcrumb;
	}

} // End avia_breadcrumbs()

/*-----------------------------------------------------------------------------------*/
/* avia_breadcrumbs_get_parents() - Retrieve the parents of the current page/post */
/*-----------------------------------------------------------------------------------*/
/**
 * Gets parent pages of any post type or taxonomy by the ID or Path.  The goal of this function is to create
 * a clear path back to home given what would normally be a "ghost" directory.  If any page matches the given
 * path, it'll be added.  But, it's also just a way to check for a hierarchy with hierarchical post types.
 *
 * @since 3.7.0
 * @param int $post_id ID of the post whose parents we want.
 * @param string $path Path of a potential parent page.
 * @return array $trail Array of parent page links.
 */
function avia_breadcrumbs_get_parents( $post_id = '', $path = '' ) {

/* Set up an empty trail array. */
	$trail = array();

/* If neither a post ID nor path set, return an empty array. */
	if ( empty( $post_id ) && empty( $path ) )
		return $trail;

/* If the post ID is empty, use the path to get the ID. */
	if ( empty( $post_id ) ) 
	{

/* Get parent post by the path. */
		$parent_page = get_page_by_path( $path );

/* ********************************************************************
		Modification: The above line won't get the parent page if
		the post type slug or parent page path is not the full path as required
		by get_page_by_path. By using get_page_with_title, the full parent
		trail can be obtained. This may still be buggy for page names that use
		characters or long concatenated names.
		Author: Byron Rode
		Date: 06 June 2011
		******************************************************************* */

if( empty( $parent_page ) )
		        // search on page name (single word)
			$parent_page = get_page_by_title ( $path );

if( empty( $parent_page ) )
			// search on page title (multiple words)
			$parent_page = get_page_by_title ( str_replace( array('-', '_'), ' ', $path ) );

/* End Modification */

/* If a parent post is found, set the $post_id variable to it. */
		if ( !empty( $parent_page ) )
			$post_id = $parent_page->ID;
	}

/* If a post ID and path is set, search for a post by the given path. */
	if ( $post_id == 0 && !empty( $path ) ) 
	{

/* Separate post names into separate paths by '/'. */
		$path = trim( $path, '/' );
		preg_match_all( "/\/.*?\z/", $path, $matches );

/* If matches are found for the path. */
		if ( isset( $matches ) ) 
		{

/* Reverse the array of matches to search for posts in the proper order. */
			$matches = array_reverse( $matches );

/* Loop through each of the path matches. */
			foreach ( $matches as $match ) {

/* If a match is found. */
				if ( isset( $match[0] ) ) {

/* Get the parent post by the given path. */
					$path = str_replace( $match[0], '', $path );
					$parent_page = get_page_by_path( trim( $path, '/' ) );

/* If a parent post is found, set the $post_id and break out of the loop. */
					if ( !empty( $parent_page ) && $parent_page->ID > 0 ) {
						$post_id = $parent_page->ID;
						break;
					}
				}
			}
		}
	}

$parents = array();
	
	/* While there's a post ID, add the post link to the $parents array. */
	while ( $post_id ) 
	{

/* Get the post by ID. */
		$page = get_post( $post_id );
		
		/**
		 * Allow to translate breadcrumb trail - fixes a problem with parent page for portfolio
		 * https://kriesi.at/support/topic/parent-page-link-works-correct-but-translation-doesnt/
		 * 
		 * @used_by				config-wpml\config.php						10
		 * @since 4.5.1
		 * @param int $post_id
		 * @return int
		 */
		$translated_id = apply_filters( 'avf_breadcrumbs_get_parents', $post_id );

/* Add the formatted post link to the array of parents. */
		$parents[] = '<a href="' . get_permalink( $translated_id ) . '" title="' . esc_attr( get_the_title( $translated_id ) ) . '">' . get_the_title( $translated_id ) . '</a>';

/* Set the parent post's parent to the post ID. */
		if(is_object($page))
		{
			$post_id = $page->post_parent;
		}
		else
		{
			$post_id = "";
		}
	}

/* If we have parent posts, reverse the array to put them in the proper order for the trail. */
	if ( ! empty( $parents ) )
	{
		$trail = array_reverse( $parents );
	}

/* Return the trail of parent posts. */
	return $trail;

} // End avia_breadcrumbs_get_parents()

/*-----------------------------------------------------------------------------------*/
/* avia_breadcrumbs_get_term_parents() - Retrieve the parents of the current term */
/*-----------------------------------------------------------------------------------*/
/**
 * Searches for term parents of hierarchical taxonomies.  This function is similar to the WordPress
 * function get_category_parents() but handles any type of taxonomy.
 *
 * @since 3.7.0
 * @param int $parent_id The ID of the first parent.
 * @param object|string $taxonomy The taxonomy of the term whose parents we want.
 * @return array $trail Array of links to parent terms.
 */
function avia_breadcrumbs_get_term_parents( $parent_id = '', $taxonomy = '' ) 
{

/* Set up some default arrays. */
	$trail = array();
	$parents = array();

/* If no term parent ID or taxonomy is given, return an empty array. */
	if ( empty( $parent_id ) || empty( $taxonomy ) )
		return $trail;

/* While there is a parent ID, add the parent term link to the $parents array. */
	while ( $parent_id ) 
	{

/* Get the parent term. */
		$parent = get_term( $parent_id, $taxonomy );

/* Add the formatted term link to the array of parent terms. */
		$parents[] = '<a href="' . get_term_link( $parent, $taxonomy ) . '" title="' . esc_attr( $parent->name ) . '">' . $parent->name . '</a>';

/* Set the parent term's parent as the parent ID. */
		$parent_id = $parent->parent;
	}

/* If we have parent terms, reverse the array to put them in the proper order for the trail. */
	if ( !empty( $parents ) )
		$trail = array_reverse( $parents );

/* Return the trail of parent terms. */
	return $trail;

} // End avia_breadcrumbs_get_term_parents()

/**
 * Filters the trail and removes the first entries that have the same href's and link text
 * Trail must be an array
 * 
 * @since 4.3.2
 * @param mixed|array $trail
 * @return mixed|array
 */
function avia_make_unique_breadcrumbs( $trail )
{
	if( ! is_array( $trail ) || empty( $trail ) )
	{
		return $trail;
	}
	
	$splitted = array();
	
	foreach( $trail as $key => $link ) 
	{
		$url = array();
		$text = array();
		preg_match( '/href=["\']?([^"\'>]+)["\']?/', $link, $url );
		preg_match( '/<\s*a[^>]*>([^<]*)<\s*\/\s*a\s*>/', $link, $text );
		
		$splitted[] = array( 
						'url'	=> isset( $url[1] ) ? $url[1] : '',
						'text'	=> isset( $text[1] ) ? $text[1] : $link
				);
	}
	
	$last_index = count( $trail );
	foreach( $splitted as $key => $current ) 
	{
		for( $i = $key + 1; $i < $last_index; $i++ )
		{
			$check = $splitted[ $i ];
			
			//	entry without url we do not remove - normally the last entry
			if( empty( $check['url'] ) )
			{
				continue;
			}
			
			if( ( strcasecmp( $current['url'], $check['url'] ) == 0 ) && ( strcasecmp( $current['text'], $check['text'] ) == 0 ) )
			{
				$splitted[ $key ]['delete'] = true;
				break;
			}
		}
	}
	
	$deleted = false;
	foreach( $splitted as $key => $current )
	{
		if( ! empty( $current['delete'] ) && ( true === $current['delete'] ) )
		{
			unset( $trail[ $key ] );
			$deleted = true;
		}
	}
	
	if( $deleted )
	{
		$trail = array_merge( $trail );
	}
	
	return $trail;
}