jQuery(document).ready(function($) { $('#save-pay-later-btn').click(function(e) { e.preventDefault(); let userEmail = $('#user_email').val(); let bookingDetails = $('#booking_details').val(); $.ajax({ type: 'POST', url: ajaxurl, // WordPress AJAX URL data: { action: 'send_booking_email', user_email: userEmail, booking_details: bookingDetails }, success: function(response) { alert(response.message); } }); }); });