The module source is below. Example usage: a checkbox on a contact form (using Form Builder) for the user to subscribe.  It's used on https://ricardo-vargas.com/contact/ EXAMPLE A method on _hooks.php. If you don't use Form Builder, use this code on your form page. $forms->addHookBefore('FormBuilderProcessor::emailForm', function($event) { $processor = $event->object; if ($processor->formName == 'contact-form') { $formData = $event->arguments
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