Question

我有以下php页面，其中我试图模拟一个搜索特定用户名（存储在数据库中）的简单示例，以及何时提交＆＃34;单击，该用户的结果显示在页面上。目前，代码显示的结果仅针对登录的用户显示。如何使其适应代码以便搜索和跟踪另一个用户？

HTML：

<p>Welcome, teachers! Here you can track student progress.</p>
<p>Enter the username of the student you wish to 'view' results for</p>
<form action="/action_page.php">
    Username: <input type="text" name="FirstName" value="Mickey"><br>
    <input type="submit" value="Submit">
</form>

Php相关代码，仅在用户登录时才允许加载页面：

session_start();
if (!isset($_SESSION['username']) or ($_SESSION['username'] == '')) {
    header("Location: login.php");

}
?>

显示当前登录用户测验结果的Php代码：

    <table class="table table-hover" style="text-align:center;">
        <thead>
          <tr>
            <th style="text-align:center;">Quiz</th>
            <th style="text-align:center;">Score (%)</th>
            <th style="text-align:center;">Certificate</th>
            <th style="text-align:center;">Retake</th>
          </tr>
        </thead>
        <tbody>
        <?php
        $a = new NewQuizScore;
        $scores = $a->getScores($_SESSION['username']);
        foreach ($scores as $score) {
            echo ("<tr>");
            echo ("<td>".$score[0]. "</td> ");
            echo ("<td>".$score[1]. "</td> ");
            echo ('<td><a href="certificate.php?name='.$score[0].'&score='.$score[1].'">Print Certificate</a></td>');
            echo ("<td><a href=\"quiz-show.php?quiz=01_PythonBasics". "\">Take it again!</a></td> ");

            echo ("</tr>");
        }
        ?>
        </tbody>
        </table>
    </div>
    </div>

重申一下，作为一个php新手，我想要一个解决方案（在我现有的上下文中提供代码），了解如何使用搜索按钮查找用户名，然后提供SEARCHED FOR用户名的信息。页面，而不是登录的用户名。我尝试了各种各样的事情，但无法提出逻辑。

我尝试过的事情：

遵循：

<form action="/action_page.php">
    Username: <input type="text" name="username1" value="username1"><br>

和

$a = new NewQuizScore;
$scores = $a->getScores($_SESSION['username1']);

我试图将文本框中输入的内容与getScores会话相关联，但显然这不起作用：

根据建议的答案进行更新 - 仍然无效：

<?php
require 'includes/functions.php';
include_once 'config.php';
include 'includes/newquizscore.php';

session_start();
if (!isset($_SESSION['username']) or ($_SESSION['username'] == '')) {
    header("Location: login.php");        
}
?>
<!DOCTYPE html>
<html>
<head>
<title></title>
<meta http-equiv="Content-Type" content="text/html; charset=UTF-8">
</head>
<body>
    <form action="#" method="post">
        Username: <input type="text" name="username1" value=""><br>
        <input type="submit" value="Submit">
    </form>
    <?php
    $username = (!empty($_POST['username1']))? $_POST['username1'] : $_SESSION['username'];
    $a = new NewQuizScore;
    # This is assuming this action is what you use to get the user's data
    $scores = $a->getScores($username)
    ?>
</body>
</html>

Answer 1

您需要使用$_POST superglobal从表单中获取值。 $_POST的透明度低于$_GET，因此我会将其用于您的表单：

<!-- ADD METHOD ------------------------------->
<!------------------------------vvvvvvvvvvvvv-->
<form action="/action_page.php" method="post">
    Username: <input type="text" name="username1" value=""><br>
    <input type="submit" value="Submit">
</form>

发布表单时，可以使用下面的脚本。请注意，由于您的表单指向/action_page.php，因此该脚本应位于此位置：

# Fetch the post value OR the current logged in (depending if form submitted or not)
# This is assuming you are searching by username1 value from form
# (since that is what you have in your form). You can use functions like
# trim() to remove empty spaces before and after submitted value to clean
# the input up a bit
$username = (!empty($_POST['username1']))? $_POST['username1'] : $_SESSION['username'];
$a = new NewQuizScore;
# This is assuming this action is what you use to get the user's data
$scores = $a->getScores($username);

以其他用户身份登录时显示基于用户名的结果（教师跟踪）

1 个答案: