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1 通过SessionID维护网站中的用户信息<?php session_start(); $_SESSION['visits']++; print 'You have visited here '.$_SESSION['visits'].' times.<br>'; echo 'session id = '.$_COOKIE['PHPSESSID']; echo "<br>"; echo "ses

1 处理表单输入获取从表单输入的数据<?php if($_SERVER['REQUEST_METHOD'] == 'GET') { ?> <form action="<?php echo $_SERVER['SCRIPT_NAME'] ?>" method="post"> What is your first name? <input type="text" name="first_