如何获取用户选择的按钮值并在laravel 5.4中的控制器上使用它

I am new with php and laravel and I have a problem:

How to get a button value chosen by the user and use it on the controller to retrieve specific information from database.

I get the "termkey" from the database and I need to know the value selected by the user.

This is my view :

<button name="termkey">{{ $ca->termkey }}</button>

change the upper to

<button name="termkey" value="{{ $ca->termkey }}">{{ $ca->termkey }}</button>

then in controller

$request->input('termkey');

you have to use value attribute in your button tag and why there is a closing anchor tag I don't understand. IN value attribute u can set any kind of value you want. then u can access it in the controller like you did

<button type="submit" name="termKey" value="{{$c->termKey}} "><span class="badge">{{$c->total}}</span></button>

And please always try to paste code not image