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PHP会话页面刷新不起作用

PHP session page refresh not working

本文关键字：刷新 不起作用 会话 PHP | 更新日期: 2023-09-27

我设置了一个php页面，这样用户就可以点击链接登录，并弹出一个带有登录凭据的弹出窗口（signin.php）。当他们填写信息并单击按钮登录时，信息将在signinfinal.php中验证。当他们正确登录时，我正在尝试创建会话。因此，当他们登录或关闭弹出窗口时，我希望他们所在的主页（index.php）刷新，我希望"登录|注册"链接更改为"嗨，（用户名）！"我将所有这些设置为一个名为"$var"的php变量，其中包含一些javascript。

奇怪的是，我可以在多个浏览器上注册和登录我的计算机，页面会刷新并正确存储我的会话，但其他用户报告说，即使在刷新页面后，会话也无法工作。这是一个棘手的问题，如果有人能帮我解决，我将不胜感激

以下是index.php…顶部的代码

        <?php 
         // this starts the session 
         session_start(); 
         $var = "";
         $varcontact = "<a href='JavaScript:newPopup('"http://www.yourfantasyfootballrealit.com/contact.php'");' class='three'>Contact</a>";
         // echo variable from the session, we set this on our other page 
         if ($_SESSION['userid'] == "") {
                $var = "<a href='JavaScript:newPopup('"http://www.yourfantasyfootballrealit.com/register.html'");' class='two'>Register</a> | <a href='JavaScript:newPopup('"http://www.yourfantasyfootballrealit.com/signin.php'");' class='two'>Sign In</a>";
            } else {
            $var = "Hello, ".$_SESSION['userid'] ."! | " . "<a href='"http://www.yourfantasyfootballreality.com/logout.php'" class='two'>Log Out</a>";
            }
         ?> 
    <!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
    <html xmlns="http://www.w3.org/1999/xhtml">
        <head>
            <script src="jquery-1.8.1.js"></script>
            <script src="jquery.easing-1.3.pack.js"></script>
            <script src="jquery-easing-compatibility.1.2.pack.js"></script>
            <script src="coda-slider.1.1.1.pack.js"></script>
            <meta http-equiv="Content-Type" content="text/html; charset=utf-8" />
            <link rel="icon" href="http://www.indiana.edu/favicon.ico" />
            <title>YourFantasyFootballReality</title>
            <link rel="stylesheet" type="text/css" href="mystyle.css" />
            <script type="text/javascript">
            // Popup window code
            function newPopup(url) {
                popupWindow = window.open(url,'popUpWindow','height=450,width=600,left=10,top=10,resizable=no,scrollbars=yes,toolbar=yes,menubar=no,location=no,directories=no,status=yes')
            }
    function closeWin() {
        document.write("<p>This is 'myWindow'</p>");
    }
    </script>
        </head>
            <body>
<!--Login and Register links-->
                    <div class="enter">
                        <?=$var?>
                    </div>

以下是signin.php 的所有代码

<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml">
<head><title>Sign In</title></head>
<body onunload="window.opener.location.reload();">
<h1>Sign In</h1>
<form action="signinfinal.php" method="POST">
 <table cellpadding="2" cellspacing="0" border="0">
   <tr>
     <td width="130"> User ID: </td>
     <td width="140"> <input name="UserID" type="text"> </td>
     <td width="300" rowspan="7" valign="top"> </td>
   </tr>
   <tr><td> Password: </td>
     <td><input name="Password" type="password" size="15"></td>
   </tr>
   <tr>
     <td colspan="2"><input type="submit" value="Sign In" name="action">
    </td>
   </tr>
 </table>
</form>
</body>
</html>

下面是signinfinal.php…的所有代码

<?php
session_start();
//$id = $_SESSION['userid'];
//$pw = $_SESSION['password'];

//this connects to the database
$con = mysql_connect("localhost","yourfan_jeengle","armyjoe");
mysql_select_db("yourfan3_demo", $con);
 //this is the info the user entered stored as variables
 $UserID    = $_POST["UserID"];
 $Password  = $_POST["Password"];
 $Action    = $_POST["action"];
 //this filters throught the variables to check against mysql injections
 $UserID = (filter_var($UserID, FILTER_SANITIZE_STRING));
 $UserID = (filter_var($UserID, FILTER_SANITIZE_URL));
 $Password = (filter_var($Password, FILTER_SANITIZE_STRING));
 $Password = (filter_var($Password, FILTER_SANITIZE_URL));
 //this is the variables that displays errors and correct instructions
 $errors = "";  
 //this gets the password from the userid entered by user
 $result = mysql_query("SELECT Password FROM Users WHERE User_ID = '$UserID'");
 $row = mysql_fetch_array($result);
 $newresult = $row['Password'];
 if (strcmp($Action, "Sign In") == 0) {
 //this what happens when the user enters data for the first time and the info is wrong
 if (($newresult == $Password) && (($UserID) && ($Password))) {
    $greeting = "Welcome, " . $UserID;
    $_SESSION['userid'] = $UserID;
    $what="Log Out";
 } else { 
    $errors .= "<li> Incorrect Credentials!";
    $what="Sign In";
 }
 if ($errors) { $color = "#ffcccc"; $fontColor = "brown"; }
 } else {
    header("Location: http://www.yourfantasyfootballrealit.com/logout.php");
 }
 ?>
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml">
 <head><title>Sign In</title></head>
<body onunload="window.opener.location.reload();">
<h1>Sign In</h1>
<?=$greeting?>
<form action="signinfinal.php" method="POST">
 <table cellpadding="2" cellspacing="0" border="0">
   <tr>
     <td width="130"> User ID: </td>
     <td width="140"> <input name="UserID" type="text" value="<?=$UserID?>"></td>
     <td bgcolor="<?=$color?>" width="300" rowspan="7" valign="top"><font color=<?=$fontColor?>><ul> <?=$errors?></font> </ul> </td>
   </tr>
   <tr> <td> Password: </td><td><input name="Password" type="password" size="15" value="<?=$Password?>"></td></tr>
   <tr><td colspan="2"><input type="submit" value="<?=$what?>" name="action">
   </tr>
 </table>
</form>
</body>
</html>

以下是logout.php中的内容（如有必要）。。。

<?php
session_start();
session_destroy();
?>

<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.0 Transitional//EN">
<html>
<head>
<title>Log Out</title>
<script language="JavaScript">
var time = null
function move() {
window.location = 'http://www.yourfantasyfootballreality.com'
}
</script>
<!--<meta http-equiv="REFRESH" content="1;url=http://www.yourfantasyfootballreality.com/"></HEAD>-->
<BODY>
<body onload="timer=setTimeout('move()',000)">
<script language="javascript">
<!--
setTimeout("self.close();",0000)
//-->
</script>
</BODY>
</HTML>

我认为signinfinal.php中的条件应该是，您在成功登录到logout.php后发送用户。所以更改条件。

if (!$errors) { $color = "#ffcccc"; $fontColor = "brown"; }
} else {
header("Location: http://www.yourfantasyfootballrealit.com/logout.php");
}

在您的页面上，session_start();需要是<?php标记之后的第一个内容。在它之前没有其他东西——没有空间，没有评论，什么都没有。

因此，取而代之的是：

<?php 
         // this starts the session 
         session_start();

你需要这个：

<?php
session_start();

注：

若要使用基于cookie的会话，必须先调用session_start（）将任何内容输出到浏览器。（来源）

此外，您没有在signin.php页面上启动会话，这在技术上可能无关紧要，但我也会将上面的代码添加到该页面中。

此外，您的IF语句不正确。

应为：

    if (strcmp($Action, "Sign In") == 0) {
          //this what happens when the user enters data for the first time and the info is wrong
          if (($newresult == $Password) && (($UserID) && ($Password))) {
             $greeting = "Welcome, " . $UserID;
             $_SESSION['userid'] = $UserID;
             $what="Log Out";
          } else { 
             $errors .= "<li> Incorrect Credentials!";
             $what="Sign In";
          }
          if ($errors) { $color = "#ffcccc"; $fontColor = "brown"; {
          // Do something... you have nothing here
          } else {
             header("Location: http://www.yourfantasyfootballrealit.com/logout.php");
          }
}

**index.php file**
         if (!isset($_SESSION['userid'])) {
                $var = "<a href='JavaScript:newPopup('"http://www.yourfantasyfootballrealit.com/register.html'");' class='two'>Register</a> | <a href='JavaScript:newPopup('"http://www.yourfantasyfootballrealit.com/signin.php'");' class='two'>Sign In</a>";
            } else {
            $var = "Hello, ".$_SESSION['userid'] ."! | " . "<a href='"http://www.yourfantasyfootballreality.com/logout.php'" class='two'>Log Out</a>";
            }
         ?>
**signupfinal.php file**
<?php
@session_start();
//$id = $_SESSION['userid'];
//$pw = $_SESSION['password'];

//this connects to the database
$con = mysql_connect("localhost","yourfan_jeengle","armyjoe");
mysql_select_db("yourfan3_demo", $con);
 //this is the info the user entered stored as variables
 $UserID    = $_POST["UserID"];
 $Password  = $_POST["Password"];
 $Action    = $_POST["action"];
 //this filters throught the variables to check against mysql injections
 $UserID = (filter_var($UserID, FILTER_SANITIZE_STRING));
 $UserID = (filter_var($UserID, FILTER_SANITIZE_URL));
 $Password = (filter_var($Password, FILTER_SANITIZE_STRING));
 $Password = (filter_var($Password, FILTER_SANITIZE_URL));
 //this is the variables that displays errors and correct instructions
 $errors = "";  
 //this gets the password from the userid entered by user
 $result = mysql_query("SELECT * FROM Users WHERE User_ID = '$UserID' and password='$Password'");
 $row = mysql_fetch_array($result);
if(mysql_num_rows($result) >0 ){
    $_SESSION['userid']=$UserID;
    header("location:index.php");
}
else{
    echo 'failes to login';
}
?>

将错误报告设置为0，这将停止向屏幕的各种输出，会话将正常工作。这解释了为什么它在一个服务器配置上工作而不是在另一个服务器上工作。请确保将错误输出到文件中。

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