WordPress Rest API Custom Endpoints Video Tutorials Notes - Check out the videos: https://www.youtube.com/watch?v=C2twS9ArdCI and https://www.youtube.com/watch?v=76sJL9fd12Y

wl-api.php

<?php
/**
 * Plugin Name: Custom API
 * Plugin URI: http://chrushingit.com
 * Description: Crushing it!
 * Version: 1.0
 * Author: Art Vandelay
 * Author URI: http://watch-learn.com
 */


function wl_posts() {
	$args = [
		'numberposts' => 99999,
		'post_type' => 'post'
	];

	$posts = get_posts($args);

	$data = [];
	$i = 0;

	foreach($posts as $post) {
		$data[$i]['id'] = $post->ID;
		$data[$i]['title'] = $post->post_title;
		$data[$i]['content'] = $post->post_content;
		$data[$i]['slug'] = $post->post_name;
		$data[$i]['featured_image']['thumbnail'] = get_the_post_thumbnail_url($post->ID, 'thumbnail');
		$data[$i]['featured_image']['medium'] = get_the_post_thumbnail_url($post->ID, 'medium');
		$data[$i]['featured_image']['large'] = get_the_post_thumbnail_url($post->ID, 'large');
		$i++;
	}

	return $data;
}

function wl_post( $slug ) {
	$args = [
		'name' => $slug['slug'],
		'post_type' => 'post'
	];

	$post = get_posts($args);


	$data['id'] = $post[0]->ID;
	$data['title'] = $post[0]->post_title;
	$data['content'] = $post[0]->post_content;
	$data['slug'] = $post[0]->post_name;
	$data['featured_image']['thumbnail'] = get_the_post_thumbnail_url($post[0]->ID, 'thumbnail');
	$data['featured_image']['medium'] = get_the_post_thumbnail_url($post[0]->ID, 'medium');
	$data['featured_image']['large'] = get_the_post_thumbnail_url($post[0]->ID, 'large');

	return $data;
}

// Used in this video https://www.youtube.com/watch?v=76sJL9fd12Y
function wl_products() {
	$args = [
		'numberposts' => 99999,
		'post_type' => 'products'
	];

	$posts = get_posts($args);

	$data = [];
	$i = 0;

	foreach($posts as $post) {
		$data[$i]['id'] = $post->ID;
		$data[$i]['title'] = $post->post_title;
        $data[$i]['slug'] = $post->post_name;
        $data[$i]['price'] = get_field('price', $post->ID);
        $data[$i]['delivery'] = get_field('delivery', $post->ID);
		$i++;
	}

	return $data;
}

add_action('rest_api_init', function() {
	register_rest_route('wl/v1', 'posts', [
		'methods' => 'GET',
		'callback' => 'wl_posts',
	]);

	register_rest_route( 'wl/v1', 'posts/(?P<slug>[a-zA-Z0-9-]+)', array(
		'methods' => 'GET',
		'callback' => 'wl_post',
    ) );
    
    // Used in this video: https://www.youtube.com/watch?v=76sJL9fd12Y	
    register_rest_route('wl/v1', 'products', [
		'methods' => 'GET',
		'callback' => 'wl_products',
	]);
});

Thank you for this code,
I want to send push notification to the mobile app when I publish (Custom post type) POST in WordPress,
I have Java spring Rest API that sends a notification, I want to integrate it with the custom post, How can I do this can you guide me?

Thank you

Custom Post Plugin Code

`<?php
/*
Plugin Name: Send Notification CPT
Description: Declares a plugin that will create a custom post type to send notifications.
Version: 1.0
*/

if( ! defined('ABSPATH')) {
exit;
}

// Register Custom Post Type Send Notifiction
function create_sendnotifiction_cpt() {

$labels = array(
	'name' => _x( 'Send Notifiction', 'Post Type General Name', 'textdomain' ),
	'singular_name' => _x( 'Send Notifiction', 'Post Type Singular Name', 'textdomain' ),
	'menu_name' => _x( 'Send Notifiction', 'Admin Menu text', 'textdomain' ),
	'name_admin_bar' => _x( 'Send Notifiction', 'Add New on Toolbar', 'textdomain' ),
	'archives' => __( 'Send Notifiction Archives', 'textdomain' ),
	'attributes' => __( 'Send Notifiction Attributes', 'textdomain' ),
	'parent_item_colon' => __( 'Parent Send Notifiction:', 'textdomain' ),
	'all_items' => __( 'All Send Notifiction', 'textdomain' ),
	'add_new_item' => __( 'Add New Send Notifiction', 'textdomain' ),
	'add_new' => __( 'Add New', 'textdomain' ),
	'new_item' => __( 'New Send Notifiction', 'textdomain' ),
	'edit_item' => __( 'Edit Send Notifiction', 'textdomain' ),
	'update_item' => __( 'Update Send Notifiction', 'textdomain' ),
	'view_item' => __( 'View Send Notifiction', 'textdomain' ),
	'view_items' => __( 'View Send Notifiction', 'textdomain' ),
	'search_items' => __( 'Search Send Notifiction', 'textdomain' ),
	'not_found' => __( 'Not found', 'textdomain' ),
	'not_found_in_trash' => __( 'Not found in Trash', 'textdomain' ),
	'featured_image' => __( 'Featured Image', 'textdomain' ),
	'set_featured_image' => __( 'Set featured image', 'textdomain' ),
	'remove_featured_image' => __( 'Remove featured image', 'textdomain' ),
	'use_featured_image' => __( 'Use as featured image', 'textdomain' ),
	'insert_into_item' => __( 'Insert into Send Notifiction', 'textdomain' ),
	'uploaded_to_this_item' => __( 'Uploaded to this Send Notifiction', 'textdomain' ),
	'items_list' => __( 'Send Notifiction list', 'textdomain' ),
	'items_list_navigation' => __( 'Send Notifiction list navigation', 'textdomain' ),
	'filter_items_list' => __( 'Filter Send Notifiction list', 'textdomain' ),
);
$args = array(
	'label' => __( 'Send Notifiction', 'textdomain' ),
	'description' => __( '', 'textdomain' ),
	'labels' => $labels,
	'menu_icon' => 'dashicons-format-chat',
	'supports' => array('title', 'editor', 'excerpt', 'thumbnail', 'revisions', 'author', 'comments', 'trackbacks', 'page-attributes', 'post-formats', 'custom-fields'),
	'taxonomies' => array(),
	'public' => true,
	'show_ui' => true,
	'show_in_menu' => true,
	'menu_position' => 5,
	'show_in_admin_bar' => true,
	'show_in_nav_menus' => true,
	'can_export' => true,
	'has_archive' => true,
	'hierarchical' => false,
	'exclude_from_search' => false,
	'show_in_rest' => true,
	'publicly_queryable' => true,
	'capability_type' => 'post',
);
register_post_type( 'sendnotifiction', $args );

}
add_action( 'init', 'create_sendnotifiction_cpt', 0 );

///

function my_plugin_rest_route_for_term( $route, $term ) {
if ( $term->taxonomy === 'genre' ) {
$route = 'http://192.168.100.24:8181/notification/topic' . $term->term_id;
}

return $route;

}
add_filter( 'rest_route_for_term', 'my_plugin_rest_route_for_term', 10, 2 );

//

function rewrite_tuts_flush(){

create_vehicle_details();
flush_rewrite_rules();

}

?>`

@hamzu06 I have no idea man, sorry.

Thank You @ivandoric, my issue is resolved.

Thank You @ivandoric

@theahmedoff No problem! :)

custom post type shows field values on all posts url but shows null values on single post url.

Hey I wanna thank you for this snippet. It really helped me man.
I would want to ask you if there is a way to have an offset or a pagination inside the rest-api ? I want to add another filter like "?page=1,2,3" etc
Thank you.

Hi,
I tried the way you coded the endpoint, but for some reason my endpoint is not working.
When I go to the endpoints I'm directed towards the homepage of the site.
Can you help? Thanks in advance

Pastebin: https://pastebin.com/LeeEnMvb

@Esiarp Maybe you need to change the permalinks in WP admin. To use something like /postname/ instead of /?p=123

@ivandoric That was exactly the issue! I changed it to "Day and name" and works perfectly. Thank you!

@ivandoric First of all thank you to share this content for us. But, I have some problems at this code. I don't know where can I find the endpoints for the wordpress article. For example I want to get post category but I don't know the endpoint for category like get_the_post_thumbnail_url. Please help us.
Thank you for code again

does simply running the code add it as a plug in? that is the part I cannot figure out still lol

can i use ?slug= or /id like>> http://site/wp-json/wp/v2/posts/id or ?slug= with this plugin ? No . and why i cant:)