php session 檢測和登出_PHP教程

複製代碼 代碼如下:
session_start();
$_SESSION['username']="zhuzhao";
?>

複製代碼 代碼如下:
session_start();
unset($_SESSION['username']);
if(isset($_SESSION['username']))
echo "username已經存在";
else
echo "username不存在";
?>

http://www.bkjia.com/PHPjc/319897.htmlwww.bkjia.comtruehttp://www.bkjia.com/PHPjc/319897.htmlTechArticle複製代碼 代碼如下: ?php session_start(); $_SESSION['username']="zhuzhao"; ? 複製代碼 代碼如下: ?php session_start(); unset($_SESSION['username']); if(isset($_SESSIO...

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