PHP Set Cookie and Retrieve Cookie

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<?php
  $cookie_name = "user";
  $cookie_value = "Alex Porter";
  setcookie($cookie_name, $cookie_value, time() + (86400 * 30), "/");
?>

<?php
  if(!isset($_COOKIE[$cookie_name])) {
       echo "Cookie named '" . $cookie_name . "' is not set!";
  } else {
       echo "Cookie '" . $cookie_name . "' is set!<br>";
       echo "Value is: " . $_COOKIE[$cookie_name];
  }
?>