[Разметка для хлебных крошек] #wordpress #seo #breadcrumbs

functions.php

function schemaBreadcrumbsJson() {
	global $post;
	$arrayBreadcrumbs = array();
	$parent_id			= ( $post ) ? $post->post_parent : '';

	if(is_category()) { // для рубрики
		$parents = get_ancestors( get_query_var('cat'), 'category' );
		foreach ( array_reverse( $parents ) as $cat ) {
			array_push($arrayBreadcrumbs, [get_cat_name( $cat ), get_category_link( $cat )]);
		}
		$cat = get_query_var('cat');
		array_push($arrayBreadcrumbs, [get_cat_name( $cat ), get_category_link( $cat )]);
	} 
	else if (is_single()) { // для одиночной записи
		if ( get_post_type() != 'post' ) { // для кастомного типа записи
			$parents = array_reverse( wp_get_object_terms($post->ID, get_taxonomies()) );
			foreach ( $parents as $cat ) {
				array_push($arrayBreadcrumbs, [$cat->name, get_term_link($cat->term_id, $cat->taxonomy)]);
			}
		} else { // для обычного поста
			$cat = get_the_category(); $catID = $cat[0]->cat_ID;
			$parents = get_ancestors( $catID, 'category' );
			$parents = array_reverse( $parents );
			array_push(	$parents, $catID);
			
			foreach ( $parents as $cat ) {
				array_push($arrayBreadcrumbs, [get_cat_name( $cat ), get_category_link( $cat )]);
			}
		}

		// add current post
		$postTitle = get_the_title();
		$postLink = get_the_permalink();
		array_push($arrayBreadcrumbs, [$postTitle, $postLink]);
	}
	else if(is_archive()) {
		$term = get_queried_object();

		// add current tax
		$titleArchive = $term->name;
		$linkArchive = get_term_link($term->term_id, $term->taxonomy);
		array_push($arrayBreadcrumbs, [$titleArchive, $linkArchive]);
	} elseif ( is_page() ) { // для страниц

		if($parent_id) {
			$parents = get_post_ancestors( get_the_ID() );
			foreach ( array_reverse( $parents ) as $pageID ) {
				array_push($arrayBreadcrumbs, [get_the_title( $pageID ), get_page_link( $pageID )]);
			}
		}
		// add current page
		$postTitle = get_the_title();
		$postLink = get_the_permalink();
		array_push($arrayBreadcrumbs, [$postTitle, $postLink]);
	}

	if ($arrayBreadcrumbs) : ?>
		<script type="application/ld+json">
			{
				"@context": "http://schema.org",
				"@type": "BreadcrumbList",
				"itemListElement": [
						<?php
						$count = 1;
						foreach ($arrayBreadcrumbs as $item) :
							if ($count != 1) echo ',';
							?> {
								"@type": "ListItem",
								"position": <?php echo $count; ?>,
								"item": {
										"@id": "<?php echo $item[1]; ?>",
										"name": "<?php echo $item[0]; ?>"
								}
							}
							<?php
							$count++;
						endforeach;
						?>
				]
			}
		</script>
	<?php
	endif;
}

functions_v2.php

function schemaBreadcrumbsJson() {
	global $post;
	$arrayBreadcrumbs = array();
	$parent_id			= ( $post ) ? $post->post_parent : '';

	if(is_category()) { // для рубрики
		$parents = get_ancestors( get_query_var('cat'), 'category' );
		foreach ( array_reverse( $parents ) as $cat ) {
			array_push($arrayBreadcrumbs, [get_cat_name( $cat ), get_category_link( $cat )]);
		}
		$cat = get_query_var('cat');
		array_push($arrayBreadcrumbs, [get_cat_name( $cat ), get_category_link( $cat )]);
	} 
	else if (is_single()) { // для одиночной записи
		if ( get_post_type() != 'post' ) { // для кастомного типа записи
			$parents = array_reverse( wp_get_object_terms($post->ID, get_taxonomies()) );
			if($parents){
				foreach ( $parents as $cat ) {
					array_push($arrayBreadcrumbs, [$cat->name, get_term_link($cat->term_id, $cat->taxonomy)]);
				}
			}
			if($parent_id) {
				$parents = get_post_ancestors( get_the_ID() );
				foreach ( array_reverse( $parents ) as $pageID ) {
					array_push($arrayBreadcrumbs, [get_the_title( $pageID ), get_page_link( $pageID )]);
				}
			}
		} else { // для обычного поста
			$cat = get_the_category(); $catID = $cat[0]->cat_ID;
			$parents = get_ancestors( $catID, 'category' );
			$parents = array_reverse( $parents );
			array_push(	$parents, $catID);
			
			foreach ( $parents as $cat ) {
				array_push($arrayBreadcrumbs, [get_cat_name( $cat ), get_category_link( $cat )]);
			}
		}

		// add current post
		$postTitle = get_the_title();
		$postLink = get_the_permalink();
		array_push($arrayBreadcrumbs, [$postTitle, $postLink]);
	}
	else if(is_archive()) {
		$term = get_queried_object();

		// add current tax
		$titleArchive = $term->name;
		$linkArchive = get_term_link($term->term_id, $term->taxonomy);
		array_push($arrayBreadcrumbs, [$titleArchive, $linkArchive]);
	} elseif ( is_page() ) { // для страниц


		if($parent_id) {
			$parents = get_post_ancestors( get_the_ID() );
			foreach ( array_reverse( $parents ) as $pageID ) {
				array_push($arrayBreadcrumbs, [get_the_title( $pageID ), get_page_link( $pageID )]);
			}
		}
		// add current page
		$postTitle = get_the_title();
		$postLink = get_the_permalink();
		array_push($arrayBreadcrumbs, [$postTitle, $postLink]);
	}

	if ($arrayBreadcrumbs) : ?>
		<script type="application/ld+json">
			{
				"@context": "http://schema.org",
				"@type": "BreadcrumbList",
				"itemListElement": [
						<?php
						$count = 1;
						foreach ($arrayBreadcrumbs as $item) :
							if ($count != 1) echo ',';
							?> {
								"@type": "ListItem",
								"position": <?php echo $count; ?>,
								"item": {
										"@id": "<?php echo $item[1]; ?>",
										"name": "<?php echo $item[0]; ?>"
								}
							}
							<?php
							$count++;
						endforeach;
						?>
				]
			}
		</script>
	<?php
	endif;
}