[REST API example] #wordpress

sample.php

<?php

// Register REST API endpoints
class GenerateWP_Custom_REST_API_Endpoints {

	/**
	 * Register the routes for the objects of the controller.
	 */
	public static function register_endpoints() {
		// endpoints will be registered here
		register_rest_route( 'candyshop/v1', '/candy', array(
			'methods' => WP_REST_Server::READABLE,
			'callback' => array( 'GenerateWP_Custom_REST_API_Endpoints', 'get_candy' ),
		) );
		register_rest_route( 'candyshop/v1', '/candy', array(
			'methods' => WP_REST_Server::CREATABLE,
			'callback' => array( 'GenerateWP_Custom_REST_API_Endpoints', 'create_candy' ),
		) );
	}

	/**
	 * Get all the candies
	 *
	 * @param WP_REST_Request $request Full data about the request.
	 * @return WP_Error|WP_REST_Request
	 */
	public static function get_candy( $request ) {
		$data = get_posts( array(
			'post_type'      => 'candy',
			'post_status'    => 'publish',
			'posts_per_page' => 20,
		) );

		// @TODO do your magic here
		return new WP_REST_Response( $data, 200 );
	}

	/**
	 * Add a new candy
	 *
	 * @param WP_REST_Request $request Full data about the request.
	 * @return WP_Error|WP_REST_Request
	 */
	public static function create_candy( $request ) {
		$params = $request->get_body_params();

		$post_id = wp_insert_post( array(
			'post_title'    => isset( $params['name']    ) ? $params['name'] : 'Untitled Candy',
			'post_content'  => isset( $params['details'] ) ? $params['details'] : '',
			'post_type'     => 'candy',
			'post_status'   => 'publish',
		) );

		// @TODO do your magic here
		return new WP_REST_Response( $post_id, 200 );
	}
}
add_action( 'rest_api_init', array( 'GenerateWP_Custom_REST_API_Endpoints', 'register_endpoints' ) );