AJAX in WordPress Themes

AJAX in WordPress Themes — a practical guide to WordPress theme AJAX with clear examples you can reuse in real projects.

WordPress Theme Development Series (56/96). Prefer one article? Read the complete WordPress theme development tutorial.

Short description

Localize script data (URL + nonce), verify on server, return HTML/JSON fragments.

Localize for AJAX

wp_localize_script('acme-main', 'AcmeTheme', [
  'ajaxUrl' => admin_url('admin-ajax.php'),
  'nonce' => wp_create_nonce('acme_theme'),
]);