+ $classes = array_map( 'esc_attr', $classes );
+
+ /**
+ * Filter the list of CSS classes for the current post.
+ *
+ * @since 2.7.0
+ *
+ * @param array $classes An array of post classes.
+ * @param array $class An array of additional classes added to the post.
+ * @param int $post_id The post ID.
+ */
+ $classes = apply_filters( 'post_class', $classes, $class, $post->ID );
+
+ return array_unique( $classes );
+}
+
+/**
+ * Display the classes for the body element.
+ *
+ * @since 2.8.0
+ *
+ * @param string|array $class One or more classes to add to the class list.
+ */
+function body_class( $class = '' ) {
+ // Separates classes with a single space, collates classes for body element
+ echo 'class="' . join( ' ', get_body_class( $class ) ) . '"';
+}
+
+/**
+ * Retrieve the classes for the body element as an array.
+ *
+ * @since 2.8.0
+ *
+ * @global WP_Query $wp_query
+ *
+ * @param string|array $class One or more classes to add to the class list.
+ * @return array Array of classes.
+ */
+function get_body_class( $class = '' ) {
+ global $wp_query;
+
+ $classes = array();
+
+ if ( is_rtl() )
+ $classes[] = 'rtl';
+
+ if ( is_front_page() )
+ $classes[] = 'home';
+ if ( is_home() )
+ $classes[] = 'blog';
+ if ( is_archive() )
+ $classes[] = 'archive';
+ if ( is_date() )
+ $classes[] = 'date';
+ if ( is_search() ) {
+ $classes[] = 'search';
+ $classes[] = $wp_query->posts ? 'search-results' : 'search-no-results';
+ }
+ if ( is_paged() )
+ $classes[] = 'paged';
+ if ( is_attachment() )
+ $classes[] = 'attachment';
+ if ( is_404() )
+ $classes[] = 'error404';
+
+ if ( is_single() ) {
+ $post_id = $wp_query->get_queried_object_id();
+ $post = $wp_query->get_queried_object();
+
+ $classes[] = 'single';
+ if ( isset( $post->post_type ) ) {
+ $classes[] = 'single-' . sanitize_html_class($post->post_type, $post_id);
+ $classes[] = 'postid-' . $post_id;
+
+ // Post Format
+ if ( post_type_supports( $post->post_type, 'post-formats' ) ) {
+ $post_format = get_post_format( $post->ID );
+
+ if ( $post_format && !is_wp_error($post_format) )
+ $classes[] = 'single-format-' . sanitize_html_class( $post_format );
+ else
+ $classes[] = 'single-format-standard';
+ }
+ }
+
+ if ( is_attachment() ) {
+ $mime_type = get_post_mime_type($post_id);
+ $mime_prefix = array( 'application/', 'image/', 'text/', 'audio/', 'video/', 'music/' );
+ $classes[] = 'attachmentid-' . $post_id;
+ $classes[] = 'attachment-' . str_replace( $mime_prefix, '', $mime_type );
+ }
+ } elseif ( is_archive() ) {
+ if ( is_post_type_archive() ) {
+ $classes[] = 'post-type-archive';
+ $post_type = get_query_var( 'post_type' );
+ if ( is_array( $post_type ) )
+ $post_type = reset( $post_type );
+ $classes[] = 'post-type-archive-' . sanitize_html_class( $post_type );
+ } elseif ( is_author() ) {
+ $author = $wp_query->get_queried_object();
+ $classes[] = 'author';
+ if ( isset( $author->user_nicename ) ) {
+ $classes[] = 'author-' . sanitize_html_class( $author->user_nicename, $author->ID );
+ $classes[] = 'author-' . $author->ID;
+ }
+ } elseif ( is_category() ) {
+ $cat = $wp_query->get_queried_object();
+ $classes[] = 'category';
+ if ( isset( $cat->term_id ) ) {
+ $cat_class = sanitize_html_class( $cat->slug, $cat->term_id );
+ if ( is_numeric( $cat_class ) || ! trim( $cat_class, '-' ) ) {
+ $cat_class = $cat->term_id;
+ }
+
+ $classes[] = 'category-' . $cat_class;
+ $classes[] = 'category-' . $cat->term_id;
+ }
+ } elseif ( is_tag() ) {
+ $tag = $wp_query->get_queried_object();
+ $classes[] = 'tag';
+ if ( isset( $tag->term_id ) ) {
+ $tag_class = sanitize_html_class( $tag->slug, $tag->term_id );
+ if ( is_numeric( $tag_class ) || ! trim( $tag_class, '-' ) ) {
+ $tag_class = $tag->term_id;
+ }
+
+ $classes[] = 'tag-' . $tag_class;
+ $classes[] = 'tag-' . $tag->term_id;
+ }
+ } elseif ( is_tax() ) {
+ $term = $wp_query->get_queried_object();
+ if ( isset( $term->term_id ) ) {
+ $term_class = sanitize_html_class( $term->slug, $term->term_id );
+ if ( is_numeric( $term_class ) || ! trim( $term_class, '-' ) ) {
+ $term_class = $term->term_id;
+ }
+
+ $classes[] = 'tax-' . sanitize_html_class( $term->taxonomy );
+ $classes[] = 'term-' . $term_class;
+ $classes[] = 'term-' . $term->term_id;
+ }
+ }
+ } elseif ( is_page() ) {
+ $classes[] = 'page';
+
+ $page_id = $wp_query->get_queried_object_id();
+
+ $post = get_post($page_id);
+
+ $classes[] = 'page-id-' . $page_id;
+
+ if ( get_pages( array( 'parent' => $page_id, 'number' => 1 ) ) ) {
+ $classes[] = 'page-parent';
+ }
+
+ if ( $post->post_parent ) {
+ $classes[] = 'page-child';
+ $classes[] = 'parent-pageid-' . $post->post_parent;
+ }
+ if ( is_page_template() ) {
+ $classes[] = 'page-template';
+
+ $template_slug = get_page_template_slug( $page_id );
+ $template_parts = explode( '/', $template_slug );
+
+ foreach ( $template_parts as $part ) {
+ $classes[] = 'page-template-' . sanitize_html_class( str_replace( array( '.', '/' ), '-', basename( $part, '.php' ) ) );
+ }
+ $classes[] = 'page-template-' . sanitize_html_class( str_replace( '.', '-', $template_slug ) );
+ } else {
+ $classes[] = 'page-template-default';
+ }