presentationfontcache.exe php web page no longer appears expired when it returns

ob_start();
if(function_exists(session_cache_limiter)) { session_cache_limiter("private, must-revalidate");
}
session_start()
?>

The above introduces the presentationfontcache.exe PHP webpage that will no longer expire when it returns, including the content of presentationfontcache.exe. I hope it will be helpful to friends who are interested in PHP tutorials.