functions.php

<?php
/**
 * AJAX Load More 
 * @link http://www.billerickson.net/infinite-scroll-in-wordpress
 */
function be_ajax_load_more() {
	$args = isset( $_POST['query'] ) ? array_map( 'esc_attr', $_POST['query'] ) : array();
	$args['post_type'] = isset( $args['post_type'] ) ? esc_attr( $args['post_type'] ) : 'post';
	$args['paged'] = esc_attr( $_POST['page'] );
	$args['post_status'] = 'publish';
	ob_start();
	$loop = new WP_Query( $args );
	if( $loop->have_posts() ): while( $loop->have_posts() ): $loop->the_post();
		be_post_summary();
	endwhile; 
  
  $current = max( 1, $args['paged'] );
	$total = $loop->max_num_pages;
  if( $total > $current )
    echo '<a href="#" class="load-more">Load More</a>';
  
  endif; wp_reset_postdata();
	$data = ob_get_clean();
	wp_send_json_success( $data );
	wp_die();
}
add_action( 'wp_ajax_be_ajax_load_more', 'be_ajax_load_more' );
add_action( 'wp_ajax_nopriv_be_ajax_load_more', 'be_ajax_load_more' );