我正在用PHP制作一个智力竞赛游戏的注册和登录页面。我目前已经涵盖了基本知识，但我希望通过类似密码检查（双密码）的方式进行注册，并且当用户输入密码时，我希望它被涵盖，此时密码显示用户正在输入什么，有人能帮我吗？下面是我正在使用的代码：
登录
<?PHP
if (isset($_POST['submit']))
{
$username = $_POST['username'];
$password = $_POST['password'];
$file = file_get_contents("data.txt");
if(!strstr($file, "$username||$password"))
{
print '<script> alert ("Sorry! You have entered a Invalid Username or Password."); window.location="index.php"; </script>';
}
if(empty($username))
{
print '<script> alert ("Sorry! You have entered a Invalid Username or Password."); window.location="index.php"; </script>';
}
else
{
header("Location: /home.php");
}
}
?>
<!doctype html>
<html>
<head>
<title>Index</title>
</head>
<body>
<div id="container" style="width:500px; height:500px; border: 2px solid black; margin:auto">
<?php include "header.php"; ?>
<div id="content" style="background-color:#EEEEEE; width:500px; height:400px; float: left">
<br>
<form align="center" method="post" action="index.php" >
Username:
<input type="text" name="username" />
<br/>
<br/>
Password:
<input type="text" name="password" />
<br/>
<br/>
<input type="submit" value="Login" name="submit"/>
<input type="button" value="Register" onclick="document.location='registration.php'" />
</form>
</div>
<?php include "footer.php"; ?>
</div>
</body>
</html>
并注册
<div align="center">
<?PHP
if (isset($_POST['submit']))
{
$username = $_POST['username'];
$password = $_POST['password'];
$file = file_get_contents("data.txt");
$string = "$username||$password";
if(!strstr($file, "$string"))
{
$myFile = "data.txt";
$fh = fopen($myFile, 'a') or die("can't open file");
$stringData = "$username||$password'n";
fwrite($fh, $stringData);
print '<script> alert ("Registration Complete"); window.location="index.php"; </script>';
fclose($fh);
}
else
{
echo "Sorry the username: <b>$username</b> is already registered. Please use diferent username.";
}
}
?>
</div>
<!doctype html>
<html>
<head>
<title>Registration</title>
</head>
<body>
<div id="container" style="width:500px; height:500px; border: 2px solid black; margin:auto">
<?php include "header.php"; ?>
<div id="content" style="background-color:#EEEEEE; width:500px; height:400px; float: left">
<br>
<form align="center" method="post" action="registration.php" >
Username:
<input type="text" name="username" />
<br/>
<br/>
Password:
<input type="text" name="password" />
<br/>
<br/>
<input type="submit" value="Register" name="submit" />
</form>
</div>
<?php include "footer.php"; ?>
</div>
</body>
</html>
我正在使用平面文件数据库来存储信息。
首先，要使您的密码字段看起来像密码，您需要将其类型更改为密码而不是文本，因此type="text"变成type="password"，您还需要添加另一个密码字段并更改其名称，以便进行确认。
登录
<form align="center" method="post" action="index.php" >
Username:
<input type="text" name="username" />
<br/>
<br/>
Password:
<input type="password" name="password" />
<br/>
<br/>
Password (Confirmation):
<input type="password" name="password2" />
<br/>
<br/>
<input type="submit" value="Login" name="submit"/>
<input type="button" value="Register" onclick="document.location='registration.php'" />
</form>
然后在注册时，您需要获取请求中发送的值，并将它们相互比较（密码和密码2），如果它们相等，则让用户继续，如果它们没有显示错误消息
<?PHP
if (isset($_POST['submit']))
{
$username = $_POST['username'];
$password = $_POST['password'];
$password2 = $_POST['password2'];
if($password != $password2) die('Passwords do not match');
$file = file_get_contents("data.txt");
$string = "$username||$password";
if(!strstr($file, "$string"))
{
$myFile = "data.txt";
$fh = fopen($myFile, 'a') or die("can't open file");
$stringData = "$username||$password'n";
fwrite($fh, $stringData);
print '<script> alert ("Registration Complete"); window.location="index.php"; </script>';
fclose($fh);
}
else
{
echo "Sorry the username: <b>$username</b> is already registered. Please use diferent username.";
}
}
?>