可以写两个函数：login.php<?phpfunction login_page($errorMessage) { // Generate the Login-in page ?>
<html> <body> <h2>Login Page</h2> <form method="POST" action="login.php"> <? // Include the formatted error message if (isset($errorMessage)) echo "<h3><font color=red>$errorMessage</font></h3>"; // Generate the login <form> layout ?> <table> <tr><td>Enter your user-name:</td> <td><input type="text" size=10 maxlength=10 name="formUsername"></td></tr> <tr><td>Enter your password:</td> <td><input type="password" size=10 maxlength=10 name="formPassword"></td></tr> </table> <p><input type="submit" value="Log in"> </form> </body> </html> <? }// // Function that returns HTML page showing that // the user with the $currentLoginName is logged on // function logged_on_page($currentLoginName) { // Generate the page that shows the user // is already authenticated and authorized ?> <html> <head> <title>Welcome</title> </head> <body> <h2>Welcome!</h2> <h2>You are currently logged in as <?=$currentLoginName ?></h2> <a href="logout.php">Logout</a> </body> </html> <? }// Main session_start();// Check if we have established a session if (isset($HTTP_SESSION_VARS["authenticatedUser"])) { // There is a user logged on logged_on_page( $HTTP_SESSION_VARS["authenticatedUser"]); } else { // No session established, no POST variables // display the login form + any error message login_page($HTTP_SESSION_VARS["loginMessage"]); session_destroy(); } ?>
我有这样的程序，个人实现是在后台实现管理，定义普通为1，会员为2，到时间通过session判断是1的话response.write 1.asp是2的话response.write 2.asp
这样就可以了！
{
// Generate the Login-in page
?>
<html>
<body>
<h2>Login Page</h2>
<form method="POST" action="login.php"> <?
// Include the formatted error message if (isset($errorMessage))
echo
"<h3><font color=red>$errorMessage</font></h3>"; // Generate the login <form> layout
?>
<table>
<tr><td>Enter your user-name:</td>
<td><input type="text" size=10
maxlength=10
name="formUsername"></td></tr>
<tr><td>Enter your password:</td>
<td><input type="password" size=10
maxlength=10
name="formPassword"></td></tr>
</table>
<p><input type="submit" value="Log in">
</form>
</body>
</html>
<?
}//
// Function that returns HTML page showing that
// the user with the $currentLoginName is logged on
//
function logged_on_page($currentLoginName)
{ // Generate the page that shows the user
// is already authenticated and authorized
?>
<html>
<head>
<title>Welcome</title>
</head>
<body>
<h2>Welcome!</h2>
<h2>You are currently logged in as
<?=$currentLoginName ?></h2>
<a href="logout.php">Logout</a>
</body>
</html>
<?
}// Main
session_start();// Check if we have established a session
if (isset($HTTP_SESSION_VARS["authenticatedUser"]))
{
// There is a user logged on
logged_on_page(
$HTTP_SESSION_VARS["authenticatedUser"]);
}
else
{
// No session established, no POST variables
// display the login form + any error message
login_page($HTTP_SESSION_VARS["loginMessage"]); session_destroy();
}
?>
session_start();
if(!isset($HTTP_SESSION_VARS['jueban'])){
header("Location: loginout.php");
}
?>