我写了这个小会话脚本,我看到它不起作用.
<?php
session_start();
$username = $_SESSION["username"];
?>
<html><head>
<title>Simple Session Example</title>
</head>
<body>
<?
if(isset($_SESSION['username'])) {
$username = $_POST["username"];
echo "<h3>Hello $username</h3>";
}
else {
echo "<h3>OUT!</h3>";
echo "<form action='index.php' method='POST'>";
echo "<input type='text' name='username'>";
echo "<input type='submit' name='submit' value='Submit'></form>";
}
?>
我无法弄清楚哪个部分是错的.看起来对m来说都很好但是肯定有些不对劲.