Notice: Use of undefined constant login - assumed 'login' in C:\wamp\www\Online_exam\header.php on line 43
Notice: Use of undefined constant login - assumed 'login' in C:\wamp\www\Online_exam\header.php on line 47
Notice: Use of undefined constant login - assumed 'login' in C:\wamp\www\Online_exam\index.php on line 30
我是 PHP 新手并正在学习 SESSION，我正在尝试对此进行探索，但我收到了上述错误。一切对我来说都是正确的。请有人帮助我。
索引.php
<?php
session_start();
?>
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd">
<html>
<head>
<title>Wel come to Online Exam</title>
<meta http-equiv="Content-Type" content="text/html; charset=iso-8859-1">
<link href="quiz.css" rel="stylesheet" type="text/css">
</head>
<body>
<?php
include("header.php");
include("database.php");
extract($_POST);
if(isset($submit))
{
$rs=mysql_query("select * from mst_user where login='$loginid' and pass='$pass'");
if(mysql_num_rows($rs)<1)
{
$found="N";
}
else
{
$_SESSION[login]=$loginid;
}
}
if (isset($_SESSION[login]))
{
echo "<h1 class='style8' align=center>Wel come to Online Exam</h1>";
echo '<table width="28%" border="0" align="center">
<tr>
<td width="7%" height="65" valign="bottom"><img src="image/HLPBUTT2.JPG" width="50" height="50" align="middle"></td>
<td width="93%" valign="bottom" bordercolor="#0000FF"> <a href="sublist.php" class="style4">Subject for Quiz </a></td>
</tr>
<tr>
<td height="58" valign="bottom"><img src="image/DEGREE.JPG" width="43" height="43" align="absmiddle"></td>
<td valign="bottom"> <a href="result.php" class="style4">Result </a></td>
</tr>
</table>';
exit;
}
?>
<table width="100%" border="0">
<tr>
<td width="70%" height="25"> </td>
<td width="1%" rowspan="2" bgcolor="#CC3300"><span class="style6"></span></td>
<td width="29%" bgcolor="#CC3333"><div align="center" class="style1">User Login </div></td>
</tr>
<tr>
<td height="296" valign="top"><div align="center">
<h1 class="style8">Wel come to Online Quiz</h1>
<span class="style5"><img src="image/paathshala.jpg" width="129" height="100"><span class="style7"><img src="image/HLPBUTT2.JPG" width="50" height="50"><img src="image/BOOKPG.JPG" width="43" height="43"></span> </span>
<param name="movie" value="english theams two brothers.dat">
<param name="quality" value="high">
<param name="movie" value="Drag to a file to choose it.">
<param name="quality" value="high">
<param name="BGCOLOR" value="#FFFFFF">
<p align="left" class="style5"> </p>
<blockquote>
<p align="left" class="style5"><span class="style7">Wel Come to Online
exam. This Site will provide the quiz for various subject of interest.
You need to login for the take the online exam.</span></p>
</blockquote>
</div></td>
<td valign="top"><form name="form1" method="post" action="">
<table width="200" border="0">
<tr>
<td><span class="style2">Login ID </span></td>
<td><input name="loginid" type="text" id="loginid2"></td>
</tr>
<tr>
<td><span class="style2">Password</span></td>
<td><input name="pass" type="password" id="pass2"></td>
</tr>
<tr>
<td colspan="2"><span class="errors">
<?php
if(isset($found))
{
echo "Invalid Username or Password";
}
?>
</span></td>
</tr>
<tr>
<td colspan=2 align=center class="errors">
<input name="submit" type="submit" id="submit" value="Login"> </td>
</tr>
<tr>
<td colspan="2" bgcolor="#CC3300"><div align="center"><span class="style4">New User ? <a href="signup.php">Signup Free</a></span></div></td>
</tr>
</table>
<div align="center">
<p class="style5"><img src="images/topleft.jpg" width="134" height="128"> </p>
</div>
</form></td>
</tr>
</table>
</body>
</html>
Header.php
<style type="text/css">
<!--
body {
margin-left: 0px;
margin-top: 0px;
}
-->
</style>
<table border="0" width="100%" cellspacing="0" cellpadding="0" background="image/topbkg.jpg">
<tr>
<td width="90%" valign="top">
<!--You can modify the text, color, size, number of loops and more on the flash header by editing the text file (fence.txt) included in the zip file.-->
<div align="left"><object classid=clsid:D27CDB6E-AE6D-11cf-96B8-444553540000
codebase=http://download.macromedia.com/pub/shockwave/cabs/flash/swflash.cab#version=5,0,2,0
width=500
height=68>
<param name=movie value=image/fence.swf>
<param name=quality value=high>
<param name=BGCOLOR value=#000000>
<param name=SCALE value=showall>
<param name=wmode value=transparent>
<embed src=image/fence.swf
quality=high
pluginspage=http://www.macromedia.com/shockwave/download/index.cgi?P1_Prod_Version=ShockwaveFlash type=application/x-shockwave-flash
width=500
height=68
bgcolor=#000000
scale= showall>
</embed>
</object></div></td>
<td width="10%">
<img border="0" src="image/topright.jpg" width="203" height="68" align="right"></td>
</tr>
</table>
<table border="0" width="100%" cellspacing="0" cellpadding="0" bgcolor="#000000" background="img/blackbar.jpg">
<tr>
<td width="100%" align="right"><img border="0" src="image/blackbar.jpg" width="89" height="15"></td>
</tr>
</Table>
<Table width="100%">
<tr>
<td>
<?php "Hi ".$_SESSION[login]; ?>
</td>
<td>
<?php
if(isset($_SESSION[login]))
{
echo "<div align=\"right\"><strong><a href=\"index.php\"> Home </a>|<a href=\"signout.php\">Signout</a></strong></div>";
}
else
{
echo " ";
}
?>
</tr>
</table>