Fluent Forms Validate the Date

Booking Date Fluent Forms

add_filter('fluentform_validate_input_item_input_date', function ($errorMessage, $field, $formData, $fields, $form) {

$fieldName = 'weddingdate';
$target_form_id = 104;

if ($target_form_id != $form->id) {
    return $errorMessage;
}


if ($inputValue = \FluentForm\Framework\Helpers\ArrayHelper::get($formData, $fieldName)) {
    $exist = wpFluent()->table('fluentform_entry_details')
        ->where('form_id', $form->id)
        ->where('field_name', $fieldName)
        ->where('field_value', $inputValue)
        ->first();

    if ($exist) {
        $errorMessage = "Thank you for your interest, however another couple has booked me for this day. Please reach out via the Contact form and I'd be happy to recommend other great photographers who can capture your day.";
        return [$errorMessage];
    }
}

return $errorMessage;

}, 10, 5);

how to validate by quantity and check if still availble in stock