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我遇到了我的Php文檔的問題。該項目是做一個工作登錄/註冊頁面 錯誤MESSAGE-Php未知數據庫？
Warning: mysqli_connect(): (HY000/1049): Unknown database 'registration' in
C:\xampp\htdocs\registration\server.php on line 11
拼寫正確的文件。此外，它就不記得註冊（我認爲這連接到 「未知數據庫」 的問題？）
server.php代碼 -
<?php
\t session_start();
\t // variable declaration
\t $username = "";
\t $email = "";
\t $errors = array();
\t $_SESSION['success'] = "";
\t // connect to database
\t $db = mysqli_connect('localhost', 'root', '', 'registration');
\t // REGISTER USER
\t if (isset($_POST['reg_user'])) {
\t \t // receive all input values from the form
\t \t $username = mysqli_real_escape_string($db, $_POST['username']);
\t \t $email = mysqli_real_escape_string($db, $_POST['email']);
\t \t $password_1 = mysqli_real_escape_string($db, $_POST['password_1']);
\t \t $password_2 = mysqli_real_escape_string($db, $_POST['password_2']);
\t \t // form validation: ensure that the form is correctly filled
\t \t if (empty($username)) { array_push($errors, "Username is required"); }
\t \t if (empty($email)) { array_push($errors, "Email is required"); }
\t \t if (empty($password_1)) { array_push($errors, "Password is required"); }
\t \t if ($password_1 != $password_2) {
\t \t \t array_push($errors, "The two passwords do not match");
\t \t }
\t \t // register user if there are no errors in the form
\t \t if (count($errors) == 0) {
\t \t \t $password = md5($password_1);//encrypt the password before saving in the database
\t \t \t $query = "INSERT INTO users (username, email, password)
\t \t \t \t \t VALUES('$username', '$email', '$password')";
\t \t \t mysqli_query($db, $query);
\t \t \t $_SESSION['username'] = $username;
\t \t \t $_SESSION['success'] = "You are now logged in";
\t \t \t header('location: index.php');
\t \t }
\t }
\t // ...
\t // LOGIN USER
\t if (isset($_POST['login_user'])) {
\t \t $username = mysqli_real_escape_string($db, $_POST['username']);
\t \t $password = mysqli_real_escape_string($db, $_POST['password']);
\t \t if (empty($username)) {
\t \t \t array_push($errors, "Username is required");
\t \t }
\t \t if (empty($password)) {
\t \t \t array_push($errors, "Password is required");
\t \t }
\t \t if (count($errors) == 0) {
\t \t \t $password = md5($password);
\t \t \t $query = "SELECT * FROM users WHERE username='$username' AND password='$password'";
\t \t \t $results = mysqli_query($db, $query);
\t \t \t if (mysqli_num_rows($results) == 1) {
\t \t \t \t $_SESSION['username'] = $username;
\t \t \t \t $_SESSION['success'] = "You are now logged in";
\t \t \t \t header('location: index.php');
\t \t \t }else {
\t \t \t \t array_push($errors, "Wrong username/password combination");
\t \t \t }
\t \t }
\t }
?>文件樹
xampp -
htdocs -
registration -
errors.php，index.php，login.php，register.php，server.php，style.css
那麼，**是**那裏有一個名爲'registration'的數據庫？ – ceejayoz