signup.html

{$html = $wa->signupForm($errors)}
    {$name = sprintf('%04x%04x', mt_rand(0, 0xffff), mt_rand(0, 0xffff))}
    {$_name = " data-`$name`=\""}
    {$html|regex_replace:'/ name="/':$_name}
    <script>
(function (d, c) {
var data = d.querySelectorAll('[data-'+c+']');
for (var i = 0; i < data.length; i++) {
    if(data[i].dataset && data[i].dataset[c]) data[i].name = data[i].dataset[c];
}
})(document, '{$name}');
</script>