astra_entry_header_class( bool $echo = true )

	function astra_entry_header_class() {

		$post_id                    = astra_get_post_id();
		$classes                    = array();
		$title_markup               = astra_the_title( '', '', $post_id, false );
		$thumb_markup               = astra_get_post_thumbnail( '', '', false );
		$post_meta_markup           = astra_single_get_post_meta( '', '', false );
		$blog_single_post_structure = astra_get_option( 'blog-single-post-structure' );

		if ( ! $blog_single_post_structure || ( 'single-image' === astra_get_prop( $blog_single_post_structure, 0 ) && empty( $thumb_markup ) && 'single-title-meta' !== astra_get_prop( $blog_single_post_structure, 1 ) ) ) {
			$classes[] = 'ast-header-without-markup';
		} elseif ( empty( $title_markup ) && empty( $thumb_markup ) && ( is_page() || empty( $post_meta_markup ) ) ) {
			$classes[] = 'ast-header-without-markup';
		} else {

			if ( empty( $title_markup ) ) {
				$classes[] = 'ast-no-title';
			}

			if ( empty( $thumb_markup ) ) {
				$classes[] = 'ast-no-thumbnail';
			}

			if ( is_page() || empty( $post_meta_markup ) ) {
				$classes[] = 'ast-no-meta';
			}
		}

		$classes = array_unique( apply_filters( 'astra_entry_header_class', $classes ) );
		$classes = array_map( 'sanitize_html_class', $classes );

		echo esc_attr( join( ' ', $classes ) );
	}