render_block_core_latest_posts

function render_block_core_latest_posts( $attributes ) {
	global $post, $block_core_latest_posts_excerpt_length;

	$args = array(
		'posts_per_page'   => $attributes['postsToShow'],
		'post_status'      => 'publish',
		'order'            => $attributes['order'],
		'orderby'          => $attributes['orderBy'],
		'suppress_filters' => false,
	);

	$block_core_latest_posts_excerpt_length = $attributes['excerptLength'];
	add_filter( 'excerpt_length', 'block_core_latest_posts_get_excerpt_length', 20 );

	if ( isset( $attributes['categories'] ) ) {
		$args['category__in'] = array_column( $attributes['categories'], 'id' );
	}
	if ( isset( $attributes['selectedAuthor'] ) ) {
		$args['author'] = $attributes['selectedAuthor'];
	}

	$recent_posts = get_posts( $args );

	$list_items_markup = '';

	foreach ( $recent_posts as $post ) {

		$list_items_markup .= '<li>';

		if ( $attributes['displayFeaturedImage'] && has_post_thumbnail( $post ) ) {
			$image_style = '';
			if ( isset( $attributes['featuredImageSizeWidth'] ) ) {
				$image_style .= sprintf( 'max-width:%spx;', $attributes['featuredImageSizeWidth'] );
			}
			if ( isset( $attributes['featuredImageSizeHeight'] ) ) {
				$image_style .= sprintf( 'max-height:%spx;', $attributes['featuredImageSizeHeight'] );
			}

			$image_classes = 'wp-block-latest-posts__featured-image';
			if ( isset( $attributes['featuredImageAlign'] ) ) {
				$image_classes .= ' align' . $attributes['featuredImageAlign'];
			}

			$list_items_markup .= sprintf(
				'<div class="%1$s">%2$s</div>',
				$image_classes,
				get_the_post_thumbnail(
					$post,
					$attributes['featuredImageSizeSlug'],
					array(
						'style' => $image_style,
					)
				)
			);
		}

		$title = get_the_title( $post );
		if ( ! $title ) {
			$title = __( '(no title)' );
		}
		$list_items_markup .= sprintf(
			'<a href="%1$s">%2$s</a>',
			esc_url( get_permalink( $post ) ),
			$title
		);

		if ( isset( $attributes['displayAuthor'] ) && $attributes['displayAuthor'] ) {
			$author_display_name = get_the_author_meta( 'display_name', $post->post_author );

			/* translators: byline. %s: current author. */
			$byline = sprintf( __( 'by %s' ), $author_display_name );

			if ( ! empty( $author_display_name ) ) {
				$list_items_markup .= sprintf(
					'<div class="wp-block-latest-posts__post-author">%1$s</div>',
					esc_html( $byline )
				);
			}
		}

		if ( isset( $attributes['displayPostDate'] ) && $attributes['displayPostDate'] ) {
			$list_items_markup .= sprintf(
				'<time datetime="%1$s" class="wp-block-latest-posts__post-date">%2$s</time>',
				esc_attr( get_the_date( 'c', $post ) ),
				esc_html( get_the_date( '', $post ) )
			);
		}

		if ( isset( $attributes['displayPostContent'] ) && $attributes['displayPostContent']
			&& isset( $attributes['displayPostContentRadio'] ) && 'excerpt' === $attributes['displayPostContentRadio'] ) {

			$trimmed_excerpt = get_the_excerpt( $post );

			$list_items_markup .= sprintf(
				'<div class="wp-block-latest-posts__post-excerpt">%1$s</div>',
				$trimmed_excerpt
			);
		}

		if ( isset( $attributes['displayPostContent'] ) && $attributes['displayPostContent']
			&& isset( $attributes['displayPostContentRadio'] ) && 'full_post' === $attributes['displayPostContentRadio'] ) {
			$list_items_markup .= sprintf(
				'<div class="wp-block-latest-posts__post-full-content">%1$s</div>',
				wp_kses_post( html_entity_decode( $post->post_content, ENT_QUOTES, get_option( 'blog_charset' ) ) )
			);
		}

		$list_items_markup .= "</li>\n";
	}

	remove_filter( 'excerpt_length', 'block_core_latest_posts_get_excerpt_length', 20 );

	$class = 'wp-block-latest-posts wp-block-latest-posts__list';
	if ( isset( $attributes['align'] ) ) {
		$class .= ' align' . $attributes['align'];
	}

	if ( isset( $attributes['postLayout'] ) && 'grid' === $attributes['postLayout'] ) {
		$class .= ' is-grid';
	}

	if ( isset( $attributes['columns'] ) && 'grid' === $attributes['postLayout'] ) {
		$class .= ' columns-' . $attributes['columns'];
	}

	if ( isset( $attributes['displayPostDate'] ) && $attributes['displayPostDate'] ) {
		$class .= ' has-dates';
	}

	if ( isset( $attributes['displayAuthor'] ) && $attributes['displayAuthor'] ) {
		$class .= ' has-author';
	}

	if ( isset( $attributes['className'] ) ) {
		$class .= ' ' . $attributes['className'];
	}

	return sprintf(
		'<ul class="%1$s">%2$s</ul>',
		esc_attr( $class ),
		$list_items_markup
	);
}