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PHP兩個不同的按鈕發送相同的數據

[英]PHP Two different buttons send same data

我有兩個不同的按鈕。 一個用於刪除用戶,另一個用於更改電子郵件地址。 問題是單擊更改電子郵件按鈕實際上會將用戶從數據庫中刪除。

header.php文件

<?php
session_start();


$cookie_name = "LoginSystem";
$cookie_value = "Valid";
setcookie($cookie_name, $cookie_value, time() + (86400 * 30), "/"); // 86400 = 1 day
?>



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


  <meta charset="UTF-8">
  <meta name="description" content="Enrol site for activites">
  <meta name="keywords" content="enrol, activities, school, hobby, college, login, register">
  <meta name="author" content="Gyorgy Hadhazy">
  <meta name="viewport" content="width=device-width, initial-scale=1.0">


</head>
<body>



<header> 
    <nav>
        <div class="main-wrapper">
            <ul>
                <li><a href="index.php">HOME</a></li>
                <li><a href="about.php">ABOUT</a></li>
                <li><a href="media.php">MEDIA</a></li>
                <li><a href="activities.php">ACTIVITIES</a></li>
                <li><a href="contact.php">CONTACT</a></li>
            </ul>
            <div class="nav-login">
                <?php 
                    if (isset($_SESSION['u_id'])) {
                        echo '
                        <form action="includes/logout.inc.php" method="POST">
                            <button type="submit" name="submit">Logout</button>
                        </form>
                        ';
                       echo '<form action="deleteusr.php" method="POST">
                            <button type="submit" name="delete">Delete User</button>
                            <input type="hidden" name="user_uid" value="'. $_SESSION['u_id'].'"
                            </form>';


                    } else{
                        echo '
                        <form action="includes/login.inc.php" method="POST">
                            <input type="text" name="uid" placeholder="StudentID/email">
                            <input type="password" name="pwd" placeholder="password">
                            <button type="submit" name="submit">LOGIN</button>
                        </form>
                        <a href="signup.php">SIGN UP</a>
                        ';
                    }



                ?>

                <button type="button" onclick="resizeText(1)" name="resizeplus" class="resize-plus">+ Text size</button>
                <button type="button" onclick="resizeText(-1)" name="resizenegative">- Text size</button>  


<script>

function resizeText(multiplier) {
  if (document.body.style.fontSize == "") {
    document.body.style.fontSize = "1.0em";
  }
document.body.style.fontSize = parseFloat(document.body.style.fontSize) + (multiplier * 0.2) + "em";
}   
</script>



            </div>
        </div>
    </nav>
</header>

的index.php

    <?php
        include 'header.php';
    ?>


    <style>
        header{
        text-align: center; 
        }
        body{
            text-align: center;
        }
    </style>

    <section class="main-container">
        <div class="main-wrapper">
            <h2>HOME</h2>
        <p>Please log in if extra features are not displayed</p>
            <?php


            if (isset($_SESSION['u_email'])) {

                            echo '<form action="changeEmail.php" method="POST">
                                <button type="submit" name="email">Change Email</button> 
                                <input type="text" name="email" value="'. $_SESSION['u_email'].'"
                                </form>'; }


            ?>  
        </div>
    </section>





    <?php
    include 'footer.php';
?>

最后是應該調用的php文件: changeEmail.php

<?php
    include 'header.php';
?>

<?php
$servername = "localhost";
$username = "root";
$password = "root";
$dbname = "loginsystem";


// Create connection
$conn = new mysqli($servername, $username, $password, $dbname);
// Check connection
if ($conn->connect_error) {
    die("Connection failed: " . $conn->connect_error);
}



$email = $_SESSION['u_ email'];

$sql = "UPDATE users SET user_email='$email'";

if ($conn->query($sql) === TRUE) {
    echo "Record updated successfully";
} else {
    echo "Error updating record: " . $conn->error;
}

$conn->close();
?> 

我認為問題出在header.php中,但我不確定。 如果有人可以指出這個問題,我將非常感激。

由index.php呈現的HTML代碼

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


  <meta charset="UTF-8">
  <meta name="description" content="Enrol site for activites">
  <meta name="keywords" content="enrol, activities, school, hobby, college, login, register">
  <meta name="author" content="Gyorgy Hadhazy">
  <meta name="viewport" content="width=device-width, initial-scale=1.0">


</head>
<body>



<header> 
    <nav>
        <div class="main-wrapper">
            <ul>
                <li><a href="index.php">HOME</a></li>
                <li><a href="about.php">ABOUT</a></li>
                <li><a href="media.php">MEDIA</a></li>
                <li><a href="activities.php">ACTIVITIES</a></li>
                <li><a href="contact.php">CONTACT</a></li>
            </ul>
            <div class="nav-login">

                        <form action="includes/logout.inc.php" method="POST">
                            <button type="submit" name="submit">Logout</button>
                        </form>
                        <form action="deleteusr.php" method="POST">
                            <button type="submit" name="delete">Delete User</button>
                            <input type="hidden" name="user_uid" value="6"
                            </form>                
                <button type="button" onclick="resizeText(1)" name="resizeplus" class="resize-plus">+ Text size</button>
                <button type="button" onclick="resizeText(-1)" name="resizenegative">- Text size</button>  


<script>

function resizeText(multiplier) {
  if (document.body.style.fontSize == "") {
    document.body.style.fontSize = "1.0em";
  }
document.body.style.fontSize = parseFloat(document.body.style.fontSize) + (multiplier * 0.2) + "em";
}   
</script>



            </div>
        </div>
    </nav>
</header>

<style>
    header{
    text-align: center; 
    }
    body{
        text-align: center;
    }
</style>

<section class="main-container">
    <div class="main-wrapper">
        <h2>HOME</h2>
    <p>Please log in if extra features are not displayed</p>
        <form action="changeEmail.php" method="POST">
                            <button type="submit" name="email">Change Email</button> 
                            <input type="text" name="email" value="test11@gmail.com"
                            </form>  
    </div>
</section>






Cookie 'LoginSystem' is set!<br>Value: Valid

實際外觀圖片: 在此處輸入圖片說明

主要問題:

有兩個<input>標記缺少結尾>字符。 這意味着瀏覽器正在構建不正確的DOM樹。 它正在盡最大努力確定您要提交的表單,但它選擇了錯誤的表單(刪除表單)。

第一個示例在header.php中:

<input type="hidden" name="user_uid" value="'. $_SESSION['u_id'].'"

請注意,沒有>關閉該輸入標簽。

然后在index.php中:

<input type="text" name="email" value="'. $_SESSION['u_email'].'"

向這兩個都添加結束>字符,當您單擊按鈕時,瀏覽器將很高興地解析DOM並選擇正確的表單進行提交。

其他事宜:

changeEmail.php中有幾個問題:

$email = $_SESSION['u_ email'];

需要是

$email = $_SESSION['u_email'];

否則, $email將始終為空字符串(或您不希望使用的其他值-我不確定$_SESSIONS的行為),然后將所有電子郵件設置為空字符串。

第二個問題是您的SQL:

$sql = "UPDATE users SET user_email='$email'";

您需要使用where子句指定要設置的用戶電子郵件。 否則,將每個電子郵件設置為$email的值。

在這種情況下,您需要從發布的表單數據中獲取新的電子郵件地址。

$new_email = $_POST["email"];
$sql = "UPDATE users SET user_email='$new_email' WHERE user_email='$email'";

為了確保您將獲得新的email表單數據,請從button元素中刪除name屬性-不必要。

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