How can I check for input value?

Question

PHP

Good afternoon.
I break my head. Please tell me how you can check for the value of the Value of the input.
There is a checkbox name, you need to check for the value of this checkbox ( value == 1 )

Answer 1

on live:

if($('#idofcheckbox').val() == 1){
  //do some code
}

or more details here

Answer 2

if( $_POST[name] === value ) {}