无法通过php检索jquery设置值

I have set a value to a hidden input field through jquery.This is my jquery:-

$('#myModal').on('show.bs.modal', function(e) {
  var businessid = $(e.relatedTarget).data('businessid');
  $(e.currentTarget).find('input[name="businessID"]').val(businessid);              
});

Now I want to echo the value of hidden field using PHP. I tried many things, including:

if (!empty($_POST['businessID']))

and

echo (isset($_POST['businessID']) ? $_POST['businessID'] : '');

However it didn't work. Please help me to solve this problem.