我正在尝试使用 php 和 mysqli 创建一个简单的登录，但一直收到错误消息：致命错误：在线 C:\wamp\www\web2\database.php 中的非对象上调用成员函数 prepare() 107
数据库.php
<?php
class Database
{
public $server = "localhost";
public $database = "database";
public $user = "root";
public $password = "";
public $row;
public $result;
public $sqlExtra = " ORDER BY firstname ASC";
public $dbLocalHost;
//call connection method upon constructing
public function __construct(){
$this->createConnection();
}
//connection to the database
public function createConnection()
{
$this->dbLocalhost = new mysqli($this->server, $this->user, $this->password, $this->database)
or die("could not connect:");
//mysql_select_db($this->database)
//
// or die("Could not find the database: ".mysql_error());
}
function verifyLogin($email, $password) {
$query = "SELECT *
FROM admint
WHERE email = ?
AND password = ?
LIMIT 1";
107. $statement = $this->dbLocalHost->prepare($query);
if($statement) {
$statement->bind_param('ss', $email, $password);
$statement->execute();
if($statement->fetch()) {
$statement->close();
return true;
}
else {
return false;
}
}
}
function addElement($table, $firstName, $lastName, $email, $mobile, $password,
$faculty, $campus) {
$query = "INSERT INTO $table (first_name, last_name, email, mobile, password, faculty, campus_location)
VALUES('$firstName', '$lastName','$email','$mobile',
'$password','$faculty','$campus');";
if($this->connection->query($query)) {
header('location: regConfirm.php');
}
}
}
?>
登录.php
<?php
session_start();
require_once 'admin.php';
$admin = new Admin();
if(isset($_GET['status']) && $_GET['status'] == 'loggedout') {
$admin->logOut();
}
if($_POST && !empty($_POST['email']) && !empty($_POST['password'])) {
$valid = $admin->validateUser($_POST['email'], $_POST['password']);
if($valid) {
header("location: index.php");
}
}
?>
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml">
<head>
<meta http-equiv="Content-Type" content="text/html; charset=utf-8" />
<title>Login</title>
</head>
<body>
<div id="login">
<form method="post" action="">
<h1>Admin Login</h1>
<p>
Email:
<input type="email" name="email" />
</p>
<p>
Password:
<input type="password" name="password" />
</p>
<p>
<input type="submit" value="Login" name="Submit" />
</p>
</form>
</div>
</body>
</html>
管理员.php
<?php
/*
* To change this template, choose Tools | Templates
* and open the template in the editor.
*/
/**
* Description of admin
*
* @author Matt
*/
require 'database.php';
class admin {
function logOut() {
if(isset($_SESSION['status'])) {
unset($_SESSION['status']);
if(isset($_COOKIE[session_name()])) {
setcookie(session_name(), '', time() - 1000);
session_destroy();
}
}
}
function validateUser($email, $password) {
$db = new Database();
$verified = $db->verifyLogin($email, $password);
if($verified) {
$_SESSION['status'] = 'authorised';
//header("location: index.php");
return true;
}
else {
return false;
}
}
function confirmAdmin() {
session_start();
if($_SESSION['status'] != 'authorised')
header("location: login.php");
}
}
?>
很抱歉打扰了，谢谢。