Question

我正在尝试在注册页面上放置一个简单的验证码，但我无法验证表单上的验证码部分如果我将表单上的用户名部分留空并按下注册，它会给我一条消息，请输入用户名等等但是当涉及到验证码部分时，如果我将其留空，它将给出一条消息输入验证码但如果我输入captcha letter但不是它注册的正确的，所以我想尝试结合下面的代码

if ( $real == $guess ) {
    die ("enter captcha");
}

和此代码

if ( $real != $guess ) {
   die ("Not equal");
}

这是我的注册页码

//Collecting info
$username = $_REQUEST['username'];
$password = $_REQUEST['password'];
$pass_conf = $_REQUEST['password_conf'];
$email = $_REQUEST['email'];
$date = $_REQUEST['date'];
$guess = $_POST['captcha'];

$real = ( isset( $_SESSION['real'] ) ) ? $_SESSION['real'] : "";

//Here we will check do we have all inputs filled

if ( empty( $username ) ) {
    die("Please enter your username!<br>");
}

if ( empty( $password ) ) {
    die("Please enter your password!<br>");
}

if ( empty( $pass_conf ) ) {
   die("Please confirm your password!<br>");
}

if ( empty( $email ) ) {
   die("Please enter your email!");
}
if ( $real == $guess ) {
   die ("enter captcha");
} 

//Let's check if this username is already in use

$user_check = mysql_query("SELECT username FROM users WHERE username='$username'");
$do_user_check = mysql_num_rows( $user_check );

//Now if email is already in use

$email_check = mysql_query("SELECT email FROM users WHERE email='$email'");
$do_email_check = mysql_num_rows( $email_check );

//Now display errors

if ( $do_user_check > 0 ) {
    die("Username is already in use!<br>");
}

if ( $do_email_check > 0 ) {
    die("Email is already in use!");
}

//Now let's check does passwords match

if( $password != $pass_conf ) {
   die("Passwords don't match!");
}

//If everything is okay let's register this user

$insert = mysql_query("INSERT INTO users (username, password, email) VALUES ('$username', '$password', '$email')");
if ( !$insert ) {
   die("There's little problem: ".mysql_error());
}

echo $username.", you are now registered. Thank you!<br><a href=login.php>Login</a> | <a href=index.php>Index</a>";

}
$act = isset($_GET['act']) ? $_GET['act'] : '';
switch( $act ) {
   default;
   register_form();
   break;

   case "register";
   register();
   break;
}

Answer 1

如下：

if (empty($guess) || $guess !== $real)
{
    die("Please enter the correct CAPTCHA.<br>");
}

// the CAPTCHA entered was correct
...

Answer 2

代码：

    if ( $real == $guess ) {
   die ("enter captcha");
}

只有当real等于猜测时，

表示“输入验证码”。因此，它与你真正想要的相反，从而导致问题的原因。

您需要将其更改为：

    if ( $real != $guess ) {
   die ("enter captcha");
}

如果真实不等于猜测，则会打印“输入验证码”短语。

如何验证我的注册页面上的验证码

2 个答案: