Simple Ajax Pagination WP

functions.php

<?php
add_action('wp_ajax_infinite_scroll_home', 'infinite_scroll_home', 0);
add_action('wp_ajax_nopriv_infinite_scroll_home', 'infinite_scroll_home');
function infinite_scroll_home() {
	$exclude_posts_json = $_POST['exclude_posts'];
	$exclude_posts = json_decode($exclude_posts_json);
	$post_offset = $_POST['post_offset'];
	$infinite_scroll_args = array( 'post_type'=>'post', 'posts_per_page'=> 2,'post__not_in' => $exclude_posts, 'offset' => $post_offset);
	$infinite_scroll_query = new WP_Query( $infinite_scroll_args );
	while( $infinite_scroll_query->have_posts() ) : $infinite_scroll_query->the_post(); 
		array_push($exclude_posts, get_the_ID());
		if ( 'gallery' == get_post_format( get_the_ID() ) ) :
			get_template_part('content', 'gallery');
		else :
			get_template_part('content', 'standard');
		endif;
	endwhile; wp_reset_query();
	die;
}
?>

index.php

<div id="posts">
<?php 
$all_post_args = array( 'post_type'=>'post', 'posts_per_page'=> 2,'post__not_in' => $exclude_array);
$all_posts_query = new WP_Query( $all_post_args );
while( $all_posts_query->have_posts() ) : $all_posts_query->the_post(); 
                array_push($exclude_array, get_the_ID());
                if ( 'gallery' == get_post_format( get_the_ID() ) ) :
                                get_template_part('content', 'gallery');
                else :
                                get_template_part('content', 'standard');
                endif;
                	
endwhile; 
wp_reset_query(); 
$json_exclude_array= json_encode($exclude_array);
$total_posts = wp_count_posts( 'post' );
$total_publish_posts = $total_posts->publish;
$total_infinite_posts = $total_publish_posts - count($exclude_array);
?>
</div>
<script type="text/javascript">
var postOffset = 0;
var totalPosts = "<?php echo $total_infinite_posts; ?>";
jQuery(window).scroll(function($){
    var footerHeight = jQuery('footer').height();
    var totalDocumentHeight = jQuery(document).height() - jQuery(window).height();
    if(jQuery(window).scrollTop() + footerHeight == totalDocumentHeight + footerHeight ){
        postOffset = parseInt(postOffset) + 2;
        jQuery.ajax({
                type: 'POST',
                url: "<?php echo admin_url('admin-ajax.php'); ?>",
                data: {
                    action: "infinite_scroll_home",
                    exclude_posts: "<?php echo $json_exclude_array; ?>",
                    post_offset : postOffset
                },
                success: function(result) {
                    if( totalPosts > postOffset ) {
                       jQuery('#posts').append(result);
                        var $container = jQuery('#posts'); // our container
                        $container.masonry('destroy');
                        $container.imagesLoaded(function() {
                            $container.masonry();
                        });
                    }
                }
        });
    }
}); 
</script>