plugin.php

<?php
/**
 * Plugin Name:       Latest Posts Block
 * Description:       Display and filter latest posts.
 * Requires at least: 5.7
 * Requires PHP:      7.0
 * Version:           0.1.0
 * Author:            The WordPress Contributors
 * License:           GPL-2.0-or-later
 * License URI:       https://www.gnu.org/licenses/gpl-2.0.html
 * Text Domain:       latest-posts
 *
 * @package           blocks-course
 */

/**
 * Registers the block using the metadata loaded from the `block.json` file.
 * Behind the scenes, it registers also all assets so they can be enqueued
 * through the block editor in the corresponding context.
 *
 * @see https://developer.wordpress.org/block-editor/tutorials/block-tutorial/writing-your-first-block-type/
 */
function blocks_course_render_latest_posts_block($attributes) {
	
	
	$args = array(
		'posts_per_page' => $attributes['numberOfPosts'],
		'posts_status' =>'publish',
		'order' => $attributes['order'],
		'orderby' => $attributes['orderBy'],
		'cat' => $attributes['category']
	);
	$recent_posts = get_posts($args);

	$posts = '<ul ' . get_block_wrapper_attributes() . '>';
	
	foreach($recent_posts as $post) {
		$title = get_the_title($post);
		$title = $title ? $title : __('(No Title)', 'latest-posts');
		$permalink = get_permalink($post);
		$excerpt = get_the_excerpt($post);

		$posts .= '<li>';

		if(	$attributes['displayFeaturedImage'] && has_post_thumbnail($post) ) {
			$posts .= get_the_post_thumbnail($post, 'large' );
		}
		$posts .= '<h5><a href="' . esc_url($permalink) . '">' . $title . '</a></h5>';

		$posts .= '<time datetime="' . esc_attr( get_the_date('c', $post) ) . '">' . esc_html(get_the_date('', $post)) . '</time>';
		if(!empty($excerpt)) {
			$posts .= '<p>' . $excerpt . '</p>';
		}
		
		$posts .= '</li>';
	}
	
	$posts .= '</ul>';

	return $posts;
}

function blocks_course_latest_posts_block_init() {
	register_block_type_from_metadata( __DIR__ , array(
		'render_callback' => 'blocks_course_render_latest_posts_block'
	) );
}
add_action( 'init', 'blocks_course_latest_posts_block_init' );