Instant Cookie Deletion in PHP

In order for the $_COOKIE array to change immediately when deleting a cookie, you can use the clever technique we already know:

php<?php
  setcookie('test', '', time());
  unset($_COOKIE['test']);
  
  var_dump($_COOKIE['test']);
?>

Let's add a condition so as not to delete an already deleted cookie every time:

php<?php
  if (isset($_COOKIE['test'])) {
    setcookie('test', '', time());
    unset($_COOKIE['test']);
  }
  
  var_dump($_COOKIE['test']); // deleted
?>