嗨，我正在學習 php 和 mysql 并創建簡單的用戶系統。現在我不想使用 PHP 將用戶資料從 mysql 顯示到頁面。但我為此苦苦掙扎，因為即使用戶正確登錄，我也無法從資料庫獲取資料。我不知道代碼有什么問題，找不到問題，我正在嘗試不同的方法來獲取資料和顯示但沒有任何作業，并且資料總是變數為空。
登錄行程.php
<?php
include('connection.php');
$error = array();
$email = $_POST['email'];
if(empty($email)){
$error[] = 'Email can not be empty!';
}
$password = $_POST['password'];
if(empty($password)){
$error[] = 'Password can not be empty!';
}
if(empty($error)){
// query
$query = "SELECT userID, firstName, lastName, email, password, profileImage FROM user WHERE email=?";
$q = mysqli_stmt_init($conn);
mysqli_stmt_prepare($q, $query);
mysqli_stmt_bind_param($q, 's', $email);
mysqli_stmt_execute($q);
// store result
$result = mysqli_stmt_get_result($q);
$row = mysqli_fetch_array($result, MYSQLI_ASSOC);
if(!empty($row)){
// checking password
// unhasing password
if(password_verify($password, $row['password'])){
header('location: user-profile.php');
exit();
} else {
echo "You are not a member";
}
}
}
// get user info
function get_user_info($con, $userID){
$query = "SELECT firstName, lastName, email, profileImage FROM user WHERE userID=?";
$q = mysqli_stmt_init($con);
mysqli_stmt_prepare($q, $query);
// bind the statement
mysqli_stmt_bind_param($q, 'i', $userID);
// execute sql statement
mysqli_stmt_execute($q);
$result = mysqli_stmt_get_result($q);
$row = mysqli_fetch_array($result);
return empty($row) ? false : $row;
}
用戶組態檔.php
<?php
session_start();
include ('header.php');
$user = array();
if(isset($_SESSION['userID'])){
require ('mysqli_connect.php');
$user = get_user_info($con, $_SESSION['userID']);
}
?>
<section id="main-site">
<div class="container py-5">
<div class="row">
<div class="col-4 offset-4 shadow py-4">
<div class="upload-profile-image d-flex justify-content-center pb-5">
<div class="text-center">
<img class="img rounded-circle" style="width: 200px; height: 200px;" src="<?php echo isset($user['profileImage']) ? $user['profileImage'] : './assets/profile/beard.png'; ?>" alt="">
<h4 class="py-3">
<?php
if(isset($user['firstName'])){
printf('%s %s', $user['firstName'], $user['lastName'] );
}
?>
</h4>
</div>
</div>
<div class="user-info px-3">
<ul class="font-ubuntu navbar-nav">
<li class="nav-link"><b>First Name: </b><span><?php echo isset($user['firstName']) ? $user['firstName'] : ''; ?></span></li>
<li class="nav-link"><b>Last Name: </b><span><?php echo isset($user['lastName']) ? $user['lastName'] : ''; ?></span></li>
<li class="nav-link"><b>Email: </b><span><?php echo isset($user['email']) ? $user['email'] : ''; ?></span></li>
</ul>
</div>
</div>
</div>
</div>
</section>
<?php
include "footer.php";
?>
登錄.php
<?php
session_start();
include ('header.php');
include('login-process.php');
?>
<?php
$user = array();
require ('connection.php');
if(isset($_SESSION['userID'])){
$user = get_user_info($conn, $_SESSION['userID']);
}
if($_SERVER['REQUEST_METHOD'] == 'POST'){
require ('login-process.php');
}
?>
<section id="register">
<nav class="navbar nav">
<a href="register.php"><img src="./image/logo.png" width="150px" height="150px" alt=""></a>
</nav>
<div class="row ml-5 m-0">
<div class="col-lg-4 offset-lg-1">
<div class="text-center pb-5">
<h1 class="login-title text-white">Sign in.</h1>
<p class="p-1 m-0 font-poppins text-white-50">Welcome back! Please enter your details.</p>
</div>
<div class="upload-profile-image d-flex justify-content-center pb-5">
<div class="text-center">
<div class="d-flex justify-content-center">
<img class="camera-icon" src="./image/camera.png" alt="camera">
</div>
<img src=<?php echo isset($user['profileImage']) ? $user['profileImage']: "./assets/profile-picture/avatar.jpg"; ?> style="width: 200px; height: 200px" class="img rounded-circle" alt="profile">
<small class="form-text text-white-50">Choose Image</small>
<input type="file" form="reg-form" class="form-control-file" name="profileUpload" id="upload-profile">
</div>
</div>
<div class="d-flex justify-content-center">
<form action="login.php" method="post" enctype="multipart/form-data" id="reg-form">
<div class="form-row my-4">
<div class="col">
<input type="email" value="<?php if(isset($_POST['email'])) echo $_POST['email']; ?>" required name="email" id="email" class="form-control" placeholder="Email*">
</div>
</div>
<div class="form-row my-4">
<div class="col">
<input type="password" required name="password" id="password" class="form-control" placeholder="Password*">
</div>
</div>
<small id="login-error" class="text-danger">hi</small>
<div class="form-inline">
<input type="checkbox" name="agreement" class="form-check-input">
<label for="agreement" class="form-check-label pr-3 font-poppins text-white-50">Remember for 30 days</label>
<a href="#">Forgot password</a>
</div>
<div class="submit-btn text-center my-5">
<button type="submit" onclick="confirmPassword(event)" class="btn btn-dark rounded-pill text-white px-5 py-3">Create account</button>
</div>
</form>
</div>
</div>
</div>
</section>
<?php
include ('footer.php');
?>
注冊行程.php
<?php
include ('connection.php');
//data from the form
$firstName = $_POST['first-name'];
$lastName = $_POST['last-name'];
$email = $_POST['email'];
$password = password_hash($_POST['password'], PASSWORD_DEFAULT);
$files = $_FILES['profileUpload'];
$profileImage = upload_profile("./assets/profile-picture", $files);
//sending data from input to the database
$sql = "INSERT INTO user VALUES (DEFAULT , '$firstName', '$lastName', '$email', '$password', '$profileImage', NOW())";
if (mysqli_query($conn, $sql)) {
session_start();
$_SESSION['userID'] = mysqli_insert_id($con);
header('location:login.php');
exit();
} else {
echo "ERROR";
echo mysqli_error($conn);
}
//image
function upload_profile($path, $file){
$targetDir = $path;
$default = "avatar.jpg";
$filename = basename($file['name']);
$targetFilePath = $targetDir.$filename;
$fileType = pathinfo($targetFilePath, PATHINFO_EXTENSION);
if(!empty($filename)){
// file format
$allowType = array('jpg', 'png', 'gif', 'jpeg');
if(in_array($fileType, $allowType)){
// send file to the folder
if(move_uploaded_file($file['tmp_name'], $targetFilePath)){
return $targetFilePath;
};
}
}
//if user does not load picture return the default one
return $path .$default;
}
我想問一下代碼示例，當我有 ID 時，如何將資料庫中的資料顯示到網站中
uj5u.com熱心網友回復：
您沒有設定$_SESSION['userId']用戶何時成功登錄，所以部分
if(isset($_SESSION['userID'])){
$user = get_user_info($conn, $_SESSION['userID']);
}
不會觸發，$user也不會被設定。
改變
if(password_verify($password, $row['password'])){
header('location: user-profile.php');
exit();
} else {
echo "You are not a member";
}
到
if(password_verify($password, $row['password'])){
$_SESSION['userId'] = $row['userId']
header('location: user-profile.php');
exit();
} else {
echo "You are not a member";
}
uj5u.com熱心網友回復：
你還沒有設定值
$_SESSION['用戶ID']用這個
session_start();
$user_id = $_SESSION['userID'];
希望它能解決你的問題
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