jQuery(document).ready(function($) { $('#wpforms-form-123').on('submit', function(e) { // Replace 123 with your form ID e.preventDefault(); var phoneNumber = $('input[name="wpforms[fields][0]"]').val(); $.ajax({ url: '', type: 'POST', data: { action: 'verify_payment', wpforms: { fields: [phoneNumber] } }, success: function(response) { if (response.success) { alert(response.data); } else { alert(response.data); } } }); }); });