使用unset()时出现的错误怎么解决
<!--Code highlighting produced by Actipro CodeHighlighter (freeware)http://www.CodeHighlighter.com/--><?php ob_start('ob_gzhandler'); session_save_path('2;D:/sessionFile/sessionFile'); @session_start(); $_SESSION["username"] = 'jason'; $user = $_SESSION["username"]; printf("Your username is %s.<br />", $user); unset($user); printf("Username now set to: %s<br>", $user);?>