Custom Post Type and ACF Example

RegisterCPT.php

<?php 
// Register Custom Post Types
add_action('init', 'register_custom_posts_init');

function register_custom_posts_init() {
    // Register Products
    $products_labels = array(
        'name'               => 'Products',
        'singular_name'      => 'Product',
        'menu_name'          => 'Products'
    );
    $products_args = array(
        'labels'             => $products_labels,
        'public'             => true,
        'capability_type'    => 'post',
        'has_archive'        => true,
        'supports'           => array( 'title', 'editor', 'excerpt', 'thumbnail', 'revisions' )
    );
    register_post_type('products', $products_args);

}