functions.php

<?php

//! All Default Functions:
include_once('inc/default.php');

//! All Enqueue Functions:
include_once('inc/enqueue.php');

//! All Customize Register Functions:
include_once('inc/customize_register.php');

//! Menu Register Functions:
include_once('inc/menu_register.php');

//! Menu Register Functions:
include_once('inc/menu_register.php');

//! Sidebar Widget Register:
include_once('inc/widget_register.php');

//! Custom Posts Register:
include_once('inc/custom_post.php');

//! Shortcode:
include_once('inc/shortcode.php');









function load_more_posts_ajax() {
    $paged = isset($_POST['page']) ? intval($_POST['page']) : 1;

    $args = array(
        'post_type'      => 'post',
        'posts_per_page' => 3,
        'paged'          => $paged,
    );

    $query = new WP_Query($args);

    if ($query->have_posts()) :
        while ($query->have_posts()) : $query->the_post(); ?>
            <div class="single-post">
                <h3><a href="<?php the_permalink(); ?>"><?php the_title(); ?></a></h3>
                <p><?php the_excerpt(); ?></p>
            </div>
        <?php endwhile;
    endif;
    wp_reset_postdata();
    wp_die();
}
add_action('wp_ajax_load_more_posts', 'load_more_posts_ajax');
add_action('wp_ajax_nopriv_load_more_posts', 'load_more_posts_ajax');