在这里诊断问题有点困难,如果我的描述有点模糊,很抱歉。我有一个非常标准的登录系统,并且在大多数情况下都可以正常工作。今天我注意到一个问题,但是当我重新启动浏览器时......它不会让我登录到 admin1.php,除非我先访问 admin2.php 并导航回 admin1.php。
之后一切正常。我可以注销并重新登录就好了。
这是我有的两个文件...
admin1.php
<style>
#form_contain {
text-align: center;
}
form {
display: inline-block;
margin: 100px 0 0 !important;
}
label {
display: table-cell !important;
vertical-align: middle;
}
input[type='text'], input[type="password"] {
float: left;
display: table-cell !important;
margin: 0 0 10px;
height: 25px;
width: 260px !important;
}
</style>
<?php
session_start();
include "lib/head.php";
function protect($string)
{
$string = mysql_real_escape_string($string);
return $string;
}
$user = $_SESSION['username'];
if(!$_POST['submit'])
{
if ($_SESSION['logged'] == true) {
include_once("admin_main.php");
}
else {
?>
<div id="form_contain">
<form method="post" action="<?=$_SERVER['PHP_SELF']; ?>">
<label>Username:</label>
<input type="text" name="username" maxlength="16">
<br>
<label>Password:</label>
<input type="password" name="password" maxlength="16">
<br>
<br>
<br>
<input type="submit" name="submit" value="Login" class="btn">
</form>
<p id="alert"></p>
</div>
<?php
}
}
else
{
$user = protect($_POST['username']);
$pass = protect($_POST['password']);
if($user && $pass)
{
$sql="SELECT id,username FROM catalog_users WHERE username='$user' AND password='$pass'";
$query=mysql_query($sql) or die(mysql_error());
if(mysql_num_rows($query) == 1)
{
$row = mysql_fetch_assoc($query); // mysql_fetch_assoc gets the value for each field in the row
$_SESSION['id'] = $row['id']; //creates the first session var
$_SESSION['username'] = $row['username']; // second session var
$_SESSION['logged'] = true;
echo '
<script language="javascript">
window.location = "admin1.php";
</script>";
';
}
else
{
echo '
<script language="javascript">
window.location="admin_wrong.php";
</script>
';
}
}
else
{
echo '
<script language="javascript">
window.location="admin_wrong.php";
</script>
';
}
}
?>
admin2.php
<?php
session_start();
include('lib/head.php');
if (isset($_SESSION['logged']) && $_SESSION['logged'] == true) {
echo "
This is a secured page, welcome <b>".$_SESSION['username']."</b>
<br>
<br>
<a href='admin1.php'>Back</a>
<a href='logout.php'>Logout</a>
";
}
else {
echo "<b>Sorry, you cannot access this page</b>";
}
?>
更新:<?php session_start()
我的代码顶部之前的 CSS导致了问题