Question

Javascript needed to prevent form submit if any of field is empty. all my form fields start names start with name=add[FieldName] those are the fields that need checking.

PHP, backend check before submiting to database double check to make sure all $POST are not empty

Answer 1

I’m not going to write the javascript, but here’s some PHP.

$valid = true;
foreach($_POST as $key)
{
    if(!isset($key))
    {
        $valid = false;
    }
}

if(!$valid)
{
    header("Location: /path/to/form");
}