本文实例讲述了PHP会话控制。分享给大家供大家参考，具体如下：
关于cookie和session的测试代码：
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<?phpsession_start();define('u','a');define('p','1');if (isset($_GET['r']) && $_GET['r']== 1) { unset($_COOKIE['username']); unset($_COOKIE['password']); unset($_SESSION['valid_login']);}if (isset($_POST['username']) && isset($_POST['password'])) { $username = $_POST['username']; $password = $_POST['password']; if ($username == u && $password == p) { $_SESSION['valid_login'] = 1; setcookie('username', $username); setcookie('password', $password); } else { echo 'incorrect u or p'; }}?><?phpif (isset($_SESSION['valid_login'])) { printf('welcom, %s', $_COOKIE['username']);} else {?><form action="" method="post"> <input type="text" name="username" value="" /> <input type="password" name="password" value="" /> <input type="submit" /></form><?php}?><br /><a href="cookie_session.php" title="">refresh</a><br /><a href="cookie_session.php?r=1" title="">clear</a> |
希望本文所述对大家PHP程序设计有所帮助。
