小编Rio*_*las的帖子

我是PHP的新手,我需要一点帮助.我很确定这可能是最常见的问题之一,并且很容易修复,但我一直在努力.我会这么愚蠢

好吧,所以这是我的问题:每次我去我的localhost尝试打开我的PHP站点它不会因为我每次都得到这个错误.

"解析错误:语法错误,第4行的C:\ xampp\htdocs\exam\_register.php中的意外'$ db'(T_VARIABLE)"

这是我的PHP代码.

    <?php
    session_start()

    $db = mysqli_connect("localhost", "root", "", "authentication");

    if (isset($_POST['register_btn'])) {
        session_start();
        $username = mysql_real_escape_string($_POST['username']);
        $emailaddress = mysql_real_escape_string($_POST['emailaddress']);
        $password = mysql_real_escape_string($_POST['password']);
        $password2 = mysql_real_escape_string($_POST['password2']);

        if ($password == $password2) {
            $password = md5($password);
            $sql = "INSERT INTO users(username, email, password) VALUES ('$username', '$emailaddress', '$password')";
            mysql_query($db, $sql);
            $_SESSION['message'] = "You are now registered!";
            $_SESSION['username'] = $username;
            header("location: home.php");
        }else {
            $_SESSION['message'] = "The two passwords do not match";
        }   
    }
?>