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超級陷入簡單的會話變量

[英]super stumped on simple session variables

 原文  2011-03-16 16:50:12  1   1    php/ session/ variables

問題描述

我有以下兩個代碼片段可以正常工作.. 

    <?php session_start();
$query = '23';
$_SESSION['testing'] = $query;
echo $_SESSION['testing'] . "<html><br></html>";

echo "<html><a href='http://www.nhl-statistics.com/scripts/test2.php'>click</a></html>"
?>

而且這個鏈接也是.. 

<?php session_start();

echo $_SESSION['testing'] . "<html><br></html>";
echo "<html><a href='http://www.nhl-statistics.com/scripts/test2.php'>click</a></html>"
session_destroy();
?>

但是..我會在兩頁上張貼相同的方法無法使用的頁面，希望你們能告訴我為什么 

<?php session_start();  

?>


<script type="text/javascript">
function destroyit()
{
<?php session_destroy(); ?>
}
</script>



</head>
<body>
    <div id="page" align="center">
        <div id="header">
            <div id="companyname" align="left"></div>
            <div align="right" class="links_menu" id="menu"><a href="/index2.php">Home</a> | <a href="logged.php">Log In</a> | <a href="#">Products</a> | <a href="#">Our Services</a> | <a href="#">Contact Us</a> </div>
        </div>
        <br />
        <div id="content">
          <div id="leftpanel">
                <div class="table_top">
                    <div align="center"><span class="title_panel">News</span> </div>
                </div>
        <div class="table_content">
                    <div class="table_text">
                        <p class="news_date">blah.com<br />
                          blah.<br />
                        </p>
            </div>
          </div>
                <div class="table_bottom">
                    <img src="images/table_bottom.jpg" width="204" height="23" border="0" alt="" /><br />
                </div>
                <div class="table_top"></div>
                <div class="table_content">
                    <div class="table_text">


<html><form action="?" method="post">
 Username: <input type="text" name="uname" /><br />
 Password: <input type="text" name="pword" /><br />
 <input type="submit" />
 </form> </html>



</div>
                </div>
                <div class="table_bottom">
                    <img src="images/table_bottom.jpg" width="204" height="23" border="0" alt="" />
                </div>
                 <div class="footer">

                <p><br />
                  <a href="#">Home</a> | <a href="#">About Us</a> | <a href="#">Products</a> | <a href="#">Our Services</a> | <a href="#">Contact Us</a> | blah.com</a>.
          </p>
            </div>
          </div>
          <div id='contenttext' class='contenttext'>
            <?php $username="a75sdadmin";
$password="1dBasdns2";
$database="a75asdesting";
$pword = $_REQUEST['pword'];
$uname = $_REQUEST['uname'];
mysql_connect('myssd.com',$username,$password);
@mysql_select_db($database) or die( "Unable to select database");
$query = mysql_query("SELECT * FROM `username` WHERE `password` = '$pword' AND `username` = '$uname'");
$exsists = 0;

        WHILE($rows = mysql_fetch_array($query)){
         $exsists = 1;
         break;
         }
            if ($exsists){
            $_SESSION['usern23']=$uname;
            $_SESSION['logged']=1;
            header('Location: logged2.php');


                    }



mysql_close();

 ?>
        </div>
</body>
</html>

會話變量由於某種原因而不會發布到此頁面。.（logged2） 

<?php session_start();
echo 'welcome, ' . $_SESSION['usern23'];
?>
<!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" xml:lang="en" lang="en">
<head>

    <meta name="author" content="Wink Hosting (www.winkhosting.com)" />
    <meta http-equiv="Content-Type" content="text/html; charset=iso-8859-1" />
    <link rel="stylesheet" href="style.css" type="text/css" />
    <title>Aqua</title>
    <script src="https://ajax.googleapis.com/ajax/libs/jquery/1.4.2/jquery.min.js"></script>
<script type="text/javascript" src="/classarray.js"></script>

<script type="text/javascript">
function doit()
{
var x=document.getElementById("multi2");
var xindex = x.selectedIndex;
var y=document.getElementById("multi3");
var yindex = y.selectedIndex;

var class4 = x.options[xindex].text;
var class5 = y.options[yindex].text;

var link = "index3.php?rav=" + class4 + "&pun=" + class5
window.open(link, '_self');
}
</script>

<script type="text/javascript">
function destroyit()
{
<?php session_destroy(); ?>
}
</script>

<script type="text/javascript">

$(document).ready(function(){
  $("button.yo1").click(function rock(){
    $("div.class1").html("<h1>&nbsp;</h1><h1><br /><select id='multi2' style='width:100px;'></select><br /></h1><button id='yo8' class='yo8'>Pick Class</button>")
    childless();
    $("button.yo8").click(function rock2(){
    $("div.class3").html("<h1>&nbsp;</h1><h1><br /><select id='multi3'><option>random teacher</option></select><br /></h1><button id='yo9' class='yo9'>Pick Teacher</button>")
  $("button.yo9").click(function rock3(){
  $("div.golow").html("<button onClick='doit();'>click for notes</button>")
  $("button.yo10").click(function rock3(){
  $("div.contenttext").html("<div id='yi'></div>")
  });
  });
  });
  });
});

</script>

</head>
<body>
    <div id="page" align="center">
        <div id="header">
            <div id="companyname" align="left"></div>
            <div align="right" class="links_menu" id="menu"><a href="index2.php">Home</a> | <a href="/logged.php">Log In</a> | <a href="#">Products</a> | <a href="#">Our Services</a> | <a href="#">Contact Us</a> </div>
        </div>
        <br />
        <div id="content">
          <div id="leftpanel">
                <div class="table_top">
                    <div align="center"><span class="title_panel">News</span> </div>
                </div>
        <div class="table_content">
                    <div class="table_text">
                        <p class="news_date">sdfgass.com<br />
                          dsf<br />
                        </p>
            </div>
          </div>
                <div class="table_bottom">
                    <img src="images/table_bottom.jpg" width="204" height="23" border="0" alt="" /><br />
                </div>
                <div class="table_top"></div>
                <div class="table_content">
                    <div class="table_text">
                      <?php 
                     error_reporting(E_ALL);
                     echo $usern . '<html><br></html>';
                     echo '<html><a href="logged.php" onclick="destroyit();" >logout</a></html>';
?>

</div>
                </div>
                <div class="table_bottom">
                    <img src="images/table_bottom.jpg" width="204" height="23" border="0" alt="" />
                </div>
                 <div class="footer">

                <p><br />
                  <a href="#">Home</a> | <a href="#">About Us</a> | <a href="#">Products</a> | <a href="#">Our Services</a> | <a href="#">Contact Us</a> | Sasd.com</a>.
          </p>
            </div>
          </div>
          <div id='contenttext' class='contenttext'>

 you are now logged in 
        </div>
</body>
</html>

1 個解決方案

解決方案1
 1 已采納  2011-03-16 16:54:04

<script type="text/javascript">
function destroyit()
{
<?php session_destroy(); ?>
}
</script>

這將永遠行不通。 PHP在服務器上立即執行，遠遠早於瀏覽器將其交給生成的頁面。 如果查看頁面的源代碼，您將看到上面的代碼已生成： 

<script type="text/javascript">
function destroyit()
{

}
</script>

基本上，您是在開始一個會話，然后立即銷毀它。 如果要從客戶端JavaScript銷毀會話，則必須進行AJAX調用（或提交表單，單擊鏈接等），以調用進行銷毀的PHP腳本。

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