[英]I am trying to create this login/registration form with validation
我的代码中出现某种php错误，但是我不确定这是什么，当您到达最底下的php时，我的代码在结尾时开始变得有趣。 我正在尝试验证用户名和密码，但是却遇到某种类型的错误
<?php
include 'config.php';
?>
<!DOCTYPE html>
<html>
<head>
<title>Register Page</title>
<link rel="stylesheet" href="style.css">
</head>
<body>
<div id="main-wrapper">
<center>
<h2 style="color: white;">Register Page</h2>
<img class="avatar" src="spaceman2.jpg" style="height: 100px; width: 100px" />
</center>
<form class="my-form" action="register.php" method="post">
<label><b>Username<b></label>
<input name="username" type="text" class="input-values" placeholder="Your username" required/>
<label><b>Password<b></label>
<input name="password" type="password" class="input-values" placeholder="Your password" required/>
<label><b>Confirm Password<b></label>
<input name="cpassword" type="password" class="input-values" placeholder="Confirm password" required/>
<input name="signup_btn" id="signup-btn" type="submit" value="Sign Up"/>
<br/>
<a href="login.php"><input id="back-btn" type="button" value="<- Back"/></a>
</form>
<?php
if(isset($_POST['signup_btn']))
{
//echo '<script type="text/javascript"> alert("You are now signed in!")</script>';
$username = $_POST['username'];
$password = $_POST['password'];
$cpassword = $_POST['password'];
if($password == $cpassword)
{
$query= "SELECT * FROM user WHERE username ='$username'";
$query_run = mysqli_query($con,$query);
if(mysqli_num_rows($query_run)>0)
{
echo '<script type="text/javascript"> alert("Astronaut name already exist") </script>';
}
{
$query= "insert into user values('$username','$password')";
$query_run = mysqli_query($con, $query);
if($query_run)
{
echo '<script type="text/javascript"> alert("Astronaut is now registered! Go to Login Page!") </script>';
}
else
{
echo '<script type="text/javascript"> alert("Error!") </script>';
}
}
?>
一些东西：
您的$ cpassword引用了$ _POST ['password']而不是cpassword。
您的插入语句缺少VALUES之前的列引用。
您还应该考虑一些密码哈希/加密。
您的代码存在错误，原因是
特别是在PHP
您忘记了else并使用了$cpasswrod password
在html您不会关闭</b>
<?php
include 'config.php';
if(isset($_POST['signup_btn']))
{
//echo '<script type="text/javascript"> alert("You are now signed in!")</script>';
$username = $_POST['username'];
$password = $_POST['password'];
$cpassword = $_POST['cpassword'];
if($password == $cpassword){
$query= "SELECT * FROM user WHERE username ='$username'";
$query_run = mysqli_query($con,$query);
if(mysqli_num_rows($query_run)>0)
{
echo '<script type="text/javascript"> alert("Astronaut name already exist") </script>';
}
else{
$query= "insert into user values('$username','$password')";
$query_run = mysqli_query($con, $query);
if($query_run)
{
echo '<script type="text/javascript"> alert("Astronaut is now registered! Go to Login Page!") </script>';
}
else
{
echo '<script type="text/javascript"> alert("Error!") </script>';
}
}
}
}
?>
<html>
<head>
<title>Register Page</title>
<link rel="stylesheet" href="style.css" />
</head>
<body>
<div id="main-wrapper">
<center>
<h2 style="color: white;">Register Page</h2>
<img class="avatar" src="spaceman2.jpg" style="height: 100px; width: 100px" />
</center>
<form class="my-form" action="index.php" method="post">
<label><b>Username</b></label>
<input name="username" type="text" class="input-values" placeholder="Your username" required/>
<label><b>Password</b></label>
<input name="password" type="password" class="input-values" placeholder="Your password" required/>
<label><b>Confirm Password</b></label>
<input name="cpassword" type="password" class="input-values" placeholder="Confirm password" required/>
<input name="signup_btn" id="signup-btn" type="submit" value="Sign Up"/>
<br/>
<a href="login.php"><input id="back-btn" type="button" value="<- Back"/></a>
</form>
</div>
</body>
</html>
希望对您有所帮助
这是您的代码的新版本：（尝试）
<?php
include 'config.php';
?>
<!DOCTYPE html>
<html>
<head>
<title>Register Page</title>
<link rel="stylesheet" href="style.css">
</head>
<body>
<div id="main-wrapper">
<center>
<h2 style="color: white;">Register Page</h2>
<img class="avatar" src="spaceman2.jpg" style="height: 100px; width: 100px" />
</center>
<form class="my-form" action="register.php" method="post">
<label><b>Username</b></label>
<input name="username" type="text" class="input-values" placeholder="Your username" required />
<label><b>Password</b></label>
<input name="password" type="password" class="input-values" placeholder="Your password" required />
<label><b>Confirm Password</b></label>
<input name="cpassword" type="password" class="input-values" placeholder="Confirm password" required />
<input name="signup_btn" id="signup-btn" type="submit" value="Sign Up"/>
<br/>
<a href="login.php"><input id="back-btn" type="button" value="<- Back"/></a>
</form>
<?php
if(isset($_POST['signup_btn']))
{
//echo '<script type="text/javascript"> alert("You are now signed in!")</script>';
$username = $_POST['username'];
$password = $_POST['password'];
$cpassword = $_POST['cpassword'];
if($password == $cpassword)
{
$query= "SELECT * FROM user WHERE username ='$username'";
$query_run = mysqli_query($con,$query);
if(mysqli_num_rows($query_run)>0)
{
echo '<script type="text/javascript"> alert("Astronaut name already exist") </script>';
}else
{
$query= "insert into user (username, password) values('$username','$password')";
$query_run = mysqli_query($con, $query);
if($query_run)
{
echo '<script type="text/javascript"> alert("Astronaut is now registered! Go to Login Page!") </script>';
}
else
{
echo '<script type="text/javascript"> alert("Error!") </script>';
}
}
}
}
?>
</div>
</body>
</html>
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