mysql_real_escape_string - 登录脚本

Question

我目前正在升级朋友网站的代码,并遇到了登录脚本的问题.我试图通过使用来防止SQL注入mysql_real_escape_string().mysql_escape_string()工作正常,但mysql_real_escape_string()没有.这就是我所拥有的:

if (isset($_POST['submit']))
{
    $username = mysql_real_escape_string($_POST['username']); 
    $password = mysql_real_escape_string($_POST['password']);

    $db_link = db_connect("project");
    $query = "SELECT * FROM user WHERE username = '$username' AND password = password('$password')";
    $result = mysql_query($query) or die (mysql_error());
    $numrows = mysql_num_rows($result);

    if($numrows == 1)
    {
        RedirectToURL("home.php");
    }
    else
    {
        login_page("Invalid login! Try again");
    }   
}
else
{
    login_page("");
}

Answer 1

要使用mysql_real_escape_string,您必须登录数据库.如果您尚未登录,请使用mysql_escape_string.