PHP
(a beginner's guide)
SET A "COLOR" COOKIE WITH VALUE "RED" setcookie("Color", "Red");
COOKIES ARE PARSED INTO $_COOKIE print_r($_COOKIE);
$_COOKIE IS AN ARRAY echo $_COOKIE["Color"];
SIMPLY SET COOKIE AGAIN setcookie("Color", "Blue");
OR CREATE MORE COOKIES AS REQUIRED setcookie("Hello", "World");
INSTANTLY EXPIRE TO DELETE COOKIE setcookie("Color", null, -1);
MANUALLY UNSET VALUE IN $_COOKIE unset($_COOKIE["Color"]);