How to implement EventSource on Codeignigter app?

Thanks for the reply! I should have been more specific in my response,
Yes, it seems like fetch will only send the form data in a format like above, with the weird "WebKitFormBoundary" stuff. I tried your trim solution, but it returned an empty string.

Let me try again.

At the controller function classicFirearmByDate() you can capture the form input fields by using

PHP Code:

$date = $this->input->post('date');
$toDate = $this->input->post('to-date'); 


Don't worry or mess with the "WebKitFormBoundary" stuff. The server will parse that and put the <input> data into $_POST just like when you use a normal <form> submit.

The trim and htmlspecialchars calls were code you had in your original post, so I left them in place.