How can PHP developers ensure that cookies are accessible on subsequent pages?

PHP developers can ensure that cookies are accessible on subsequent pages by setting the cookie with the appropriate path parameter. By setting the path parameter to "/", the cookie will be accessible across all pages within the domain. This ensures that the cookie is available on subsequent pages.

// Set a cookie with a path parameter to make it accessible on subsequent pages
setcookie("cookie_name", "cookie_value", time() + 3600, "/");