Question

我正在创建一个页面，您可以使用php和phpmyadmin管理网站的数据。在本部分中，我希望此文件adminform.php能够使用会话更新一列或两列：Name和price。

这就是我得到的：

的login.php

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

<?
   // error_reporting(E_ALL);
   // ini_set("display_errors", 1);
?>

<html lang = "en">

   <head>

      <link href = "css/bootstrap.min.css" rel = "stylesheet">

      <style>
         body {
            padding-top: 40px;
            padding-bottom: 40px;
            background-color: black;
         }

         .form-signin {
            max-width: 330px;
            padding: 15px;
            margin: 0 auto;
            color: yellow;
         }

         .form-signin .form-signin-heading,
         .form-signin .checkbox {
            margin-bottom: 10px;
         }

         .form-signin .checkbox {
            font-weight: normal;
         }

         .form-signin .form-control {
            position: relative;
            height: auto;
            -webkit-box-sizing: border-box;
            -moz-box-sizing: border-box;
            box-sizing: border-box;
            padding: 10px;
            font-size: 16px;
         }

         .form-signin .form-control:focus {
            z-index: 2;
         }

         .form-signin input[type="email"] {
            margin-bottom: -1px;
            border-bottom-right-radius: 0;
            border-bottom-left-radius: 0;
            border-color:#017572;
         }

         .form-signin input[type="password"] {
            margin-bottom: 10px;
            border-top-left-radius: 0;
            border-top-right-radius: 0;
            border-color:#017572;
         }

         h2{
            text-align: center;
            color: yellow;
         }
      </style>

   </head>

   <body>

      <h2>Enter Username and Password</h2> 
      <div class = "container form-signin">

         <?php
            $msg = '';

            if (isset($_POST['login']) && !empty($_POST['username']) 
               && !empty($_POST['password'])) {

               if ($_POST['username'] == 'administrator' && 
                  $_POST['password'] == ' ') {
                  $_SESSION['valid'] = true;
                  $_SESSION['timeout'] = time();
                  $_SESSION['username'] = 'administrator';

                  echo 'You have entered valid use name and password';
                   header('Refresh: 2; URL = adminform.php');

               }else {
                  $msg = 'Wrong username or password';
               }
            }
         ?>
      </div> <!-- /container -->

      <div class = "container" style="text-align: center;">

         <form class = "form-signin" role = "form" 
            action = "<?php echo htmlspecialchars($_SERVER['PHP_SELF']); 
            ?>" method = "post">
            <h4 class = "form-signin-heading"><?php echo $msg; ?></h4>
            <input type = "text" class = "form-control" 
               name = "username" placeholder = "username = administrator" 
               required autofocus></br>
            <input type = "password" class = "form-control"
               name = "password" placeholder = "password = [spatie]" required><br>
            <button class = "btn btn-lg btn-primary btn-block" type = "submit" 
               name = "login">Login</button>
         </form>

         <form style="text-align:center;" action="menu.php">
             <button type="submit">Back to homepage</button>
             </form>
      </div> 

   </body>
</html>

adminform.php

<!DOCTYPE html>
<html>
    <link rel="stylesheet" type="text/css"href="adminform.css">
    <body>


<form style="text-align:center;" action="logout.php">
            <button type="submit">Logout</button>
            </form>
        <div class="connection">
                     <?php 
             session_start();

        //make connection
        mysql_connect('localhost','root','');

        //select db
        mysql_select_db('welkom');

        $sql="SELECT * FROM `abdijbieren`";

        $welkom = mysql_query($sql);



        ?>


            <h1>Abbey beer</h1>
            <table align="center" width="600" border="1" cellpadding="1" cellspacing="1">
            <tr>
            <th>Tracking number</th>
            <th>Name</th>
            <th>Price</th>

            <tr>


        <?php 
            while($abdijbieren=mysql_fetch_assoc($welkom)) {

                echo "<tr>";

                echo "<td>".$abdijbieren['id']."</td>";
                echo "<td>".$abdijbieren['naam']."</td>";
              echo "<td>".$abdijbieren['prijs']."</td>";

                echo "</tr>";
            }//end while


            ?>
                </table>

        </div>
 <div class="php">
        <?php

    if ( ! empty($_POST))
    {
        $mysqli = new mysqli('localhost','root','','welkom');

        if ($mysqli ->connect_error) 
        {
            die('connect error: '. $mysqli->connect_errno . ': ' . $mysqli->connect_error);
        }

        $sql = "UPDATE abdijbieren SET naam='{$mysqli->real_escape_string($_POST['naam'])}' WHERE id={$mysqli->real_escape_string($_POST['volg'])};";

        $insert = $mysqli->query($sql);

        if ($insert)
        {
            echo "<span style='color:yellow;text-align:center;'>Update succesful!";
        }

        else
        {
            die("<span style='color:yellow;text-align:center;'>Error: {$mysqli->errno} : {$mysqli->error}");
        }

        $mysqli->close();
    }
?>
                <br>
        </div>
    <h1 style="text-align:center;">Update</h1>

        <div class="form">
            <form method="post" action="">
            <input style="font-size:120%" name="track" type="text" placeholder="tracking number to select" required><br>
            <input style="font-size:120%" name="name" type="text" placeholder="name drink" required><br>
            (input style="font-size:120%" name="prijs" type="text" placeholder="prijs" required)<br>
            <input style="font-size:120%" type="submit" value="Update">
            </form>
        <?php

    if ( ! empty($_POST))
    {
        $mysqli = new mysqli('localhost','root','','welkom');

        if ($mysqli ->connect_error) 
        {
            die('connect error: '. $mysqli->connect_errno . ': ' . $mysqli->connect_error);
        }

        $sql = "UPDATE abdijbieren SET prijs='{$mysqli->real_escape_string($_POST['prijs'])}'+' EUR ' WHERE id={$mysqli->real_escape_string($_POST['volg'])};";

        $insert = $mysqli->query($sql);

        if ($insert)
        {
            echo "<span style='color:yellow;text-align:center;'>Update succesful!";
        }

        else
        {
            die("<span style='color:yellow;text-align:center;'>Error: {$mysqli->errno} : {$mysqli->error}");
        }

        $mysqli->close();
    }
?>
            <form method="post" action="">
            <input style="font-size:120%" name="track" type="text" placeholder="tracking number to select" required><br>
            <input style="font-size:120%" name="prijs" type="text" placeholder="price" required><br>
            <input style="font-size:120%" type="submit" value="Update">
            </form>
        </div>

    </body>

</html>

Logout.php

<?php
   session_start();
   unset($_SESSION["username"]);
   unset($_SESSION["password"]);

   echo 'You just logged out.';
   header('Refresh: 2; URL = header.html');
?>

我的问题是我不知道如何在adminform.php中使用我的会话。我知道它是什么，它在编写管理文件时非常有用，尽管我缺乏如何使用它的知识。

在adminform.php：

我添加tracking number以选择colomn中的值。
此代码中还有另一个问题，即我创建了多个mysql-connections和sql，导致我的程序混乱。也许是因为提交具有相同价值或其他内容。

我很难为网站创建管理文件，我需要您的帮助才能改进。任何通知或建议将不胜感激。

如何使用会话？

0 个答案: