正在从 MYSQL 数据库中检索用户名

Question

已回答的问题：

So I've made a login and signup feature to my website, but now I would like to add the username's and ranks to the sidebar.. But I can't figure out how to do this, and this is why I am asking you for help. Signup.inc.php:

<?php
session_start();

include '../dbh.php';

$fname = $_POST['fname'];
$lname = $_POST['lname'];
$uid = $_POST['uid'];
$pwd = $_POST['pwd'];

if (empty($fname)) {
    header("Location: ../parts/signup.php?error=empty");
    exit();
}
if (empty($lname)) {
    header("Location: ../parts/signup.php?error=empty");
    exit();
}
if (empty($uid)) {
    header("Location: ../parts/signup.php?error=empty");
    exit();
}
if (empty($pwd)) {
    header("Location: ../parts/signup.php?error=empty");
    exit();
} else {
$sql = "SELECT uid FROM users WHERE uid='$uid'";
$result = mysqli_query($conn, $sql);
$uidcheck = mysqli_num_rows($result);
if ($uidcheck > 0) {
    header("Location: ../parts/signup.php?error=username");
    exit();
} else {
    $enpwd = password_hash($pwd, PASSWORD_DEFAULT);
    $sql = "UPDATE users (fname, lname, uid, pwd) 
    VALUES ('$fname', '$lname', '$uid', '$enpwd')";

    $result = mysqli_query($conn, $sql);
    header("Location: ../index.php");}
}

----- Login.inc.php :

<?php
session_start();
include '../dbh.php';

$uid = $_POST['uid'];
$pwd = $_POST['pwd'];

$sql = "SELECT * FROM users WHERE uid='$uid'";
$result = mysqli_query($conn, $sql);
$row = mysqli_fetch_assoc($result);
$hash_pwd = $row['pwd'];
$hash = password_verify($pwd, $hash_pwd);

if ($hash == 0 ) {
    header("Location: ../index.php?error=empty");
} else {
    $sql = "SELECT * FROM users WHERE uid='$uid' AND pwd='$hash_pwd'";
    $result = mysqli_query($conn, $sql);

    if (!$row = mysqli_fetch_assoc($result)) {
        echo "Your username or password is incorrect!";
    } else {
        $_SESSION['id'] = $row['id'];
    }
    header("Location: ../pages/dashboard.php");
}
?>

--------- Sidebar:

    <?php
    session_start();
    if(!isset($_SESSION['id'])){ //if login in session is not set
        header("Location: ../index.php");
    }
    include '../include/idtouser.sinc.php';
    ?>
    <!DOCTYPE html>
    <html>
    <head>
        <meta charset="utf-8">
        <title>LoginSystem</title>
        <link rel="stylesheet" href="../css/global.css" type="text/css">
    </head>
    <body>
    <header id="closeNav">
        <nav>
              <div onclick="toggleNav()" id="star"><span class="hamburgerico">☰</span></div>
              <div class="profilePicture"></div>
              <div id="username">Username</div>
              <div id="rank"><p>Rank</p></div>

            <ul>
              <li><a href="#">Dashboard</a></li>
              <li><a href="#">Projects</a></li>
              <li><a href="#">Placeholder</a></li>
              <li><a href="#">Placeholder</a></li>
              <li><a href="#">Placeholder</a></li>
              <li><a href="../include/logout.inc.php">Log Out</a></li>
            </ul>
        </nav>
</header>

What would be the correct way for me to do this?

未回答的问题：并且——有没有办法在将我的排名 (1,2,3,4,5) 发布到侧边栏之前将它们转换为实际排名名称？

Answer 1

在登录页面中，添加：

$_SESSION['uid']        =   $row[1];

假设行[1]包括用户id或用户名

然后在边栏中：

<?php echo $_SESSION['uid']; ?>

我不知道等级是干什么用的，但你可以用与用户名类似的方式回显等级

正在从 MYSQL 数据库中检索用户名

Retrieving username from MYSQL database

php

mysql

sidebar

rank