How to Implement Ajax-Powered \'Load More\' Posts in WordPress?

Load More Posts via Ajax in WordPress

Implementing an "Load More" button to dynamically load posts in WordPress requires a combination of PHP and JavaScript. While you've outlined a particular approach, there may be additional factors that influence the functionality or efficiency of your code. Here's a revised and enhanced solution:

HTML Markup:

<div>
<p><strong>Functions PHP File:</strong></p>
<pre class="brush:php;toolbar:false">function more_post_ajax() {
    $offset = $_POST["offset"];
    $ppp = $_POST["ppp"];

    header("Content-Type: text/html");
    $args = [
        'suppress_filters' => true,
        'post_type' => 'post',
        'posts_per_page' => $ppp,
        'cat' => 1,
        'offset' => $offset,
    ];

    $loop = new WP_Query($args);

    while ($loop->have_posts()) {
        $loop->the_post();
        the_content();
    }
    exit;
}

add_action('wp_ajax_nopriv_more_post_ajax', 'more_post_ajax');
add_action('wp_ajax_more_post_ajax', 'more_post_ajax');

wp_localize_script(
    'twentyfifteen-script',
    'ajax_posts',
    array(
        'ajaxurl' => admin_url('admin-ajax.php'),
        'noposts' => __('No older posts found', 'twentyfifteen'),
    )
);

jQuery Function:

var ppp = 3; // Posts per page
var page = 5; // Current page number, starting from 1

$('#more_posts').click(function() {
    $('#more_posts').attr('disabled', true);
    var offset = (page * ppp) + 1;

    $.post(
        ajax_posts.ajaxurl,
        {
            action: 'more_post_ajax',
            offset: offset,
            ppp: ppp,
        }
    ).success(function(posts) {
        page++;
        $('#ajax-posts').append(posts);
        $('#more_posts').attr('disabled', false);
    });
});

Additional Considerations:

• Category filtering: You can incorporate category filtering by adding a data attribute to the "Load More" button with the category ID. Then, in the PHP code, retrieve the category ID from the $_POST array and include the 'cat' parameter in the query args.
• Infinite Load: For infinite scrolling, you can use jQuery's scroll event to load posts automatically as the user scrolls down the page. One approach is to load posts when the distance from the bottom of the page to the top of the viewport is less than a threshold, such as 100 pixels.
• Loading Indicator: Consider adding a loading spinner or indicator to provide visual feedback to the user while posts are being loaded.
• Error Handling: Ensure proper error handling in both the PHP and JavaScript code to handle any potential errors that may occur during the Ajax request or post processing.