Prevent duplicate email submission

I contactic
I’ve tried again but still goes on loop.
🙁
Thank You

Hi contactic, here it is…hope it helps.
Thank you
L
P.s.
The code before the one that I attached before is the same from https://cfdbplugin.com/?page_id=904 except than this 2 line tha I adapted to my form.
Please also note that the code from CFDB for prevent double submission is full working.

…
$formName = ‘*’; // Change to name of the form containing this field
$fieldName = ‘tua-email’; // Change to your form’s unique field name
….

/* modified CFDB*/
function is_already_submitted($formName, $fieldName, $fieldValue) {
require_once(ABSPATH . ‘wp-content/plugins/contactic/CTC_FormIterator.php’);
$exp = new CTC_FormIterator();
$exp = new CTC_FormIterator();
$atts = array();
$atts[‘show’] = $fieldName;
$atts[‘filter’] = “$fieldName=$fieldValue”;
$atts[‘unbuffered’] = ‘true’;
$exp->export($formName, $atts);
$found = false;
while ($row = $exp->nextRow()) {
$found = true;
}
return $found;
}