Set session in foreach loop is not working

Question

Am trying to set a session in foreach loop when users post a form so when they refresh the page the post values won't lost, but the session is not saving.

My Code

<?php session_start();
if(isset($_POST['EventLookUp'])){
/* city state zipcode country*/
    $EventPostArgs = filter_input_array(INPUT_POST);
    foreach($EventPostArgs as $pname => $pval){
        $_SESSION[$pname] = htmlentities($pval);
    }
echo $_SESSION['country'];
?>