<?php
session_start ();
?>
<form action="./form20240614.php" method="POST">
<input type="text" name="form20240614a">
<input type="submit">
</form>
<?php
echo session_id () . "<br>\n";
setcookie ("form20240614c", "Hallo Welt", time () + 1200);
echo htmlentites ($_POST ["form20240614a"]) . "<br>\n";
echo htmlentities ($_COOKIE ["form20240614b"]) . "<br>\n";
echo htmlentities ($_COOKIE ["form20240614c"]) . "<br>\n";
session_destroy ();
?>