注册有效,但不知何故登录无效
Registration works but somehow login not working
我是 PHP 的新手,正在遵循 login_registration 脚本,注册过程正常,用户已添加到数据库中,但是,当我尝试登录时,它显示错误 I检查 php.error 登录 wamp 服务器,它说,
PHP 1. {main}() C:\wamp64\www\php\login_register_system\login.php:0
这是我的代码
connect.inc.php
<?php
//$conn_error = "could not connect";
$mysql_host= "localhost";
$mysql_user = "root";
$mysql_pass ="";
$mysql_db ="a_database";
$conn = mysqli_connect($mysql_host,$mysql_user,$mysql_pass,$mysql_db);
/*if(!mysqli_connect($mysql_host,$mysql_user,$mysql_pass) && !mysqli_select_db($mysql_db)){
die($conn_error);
}
*/
if(!$conn){
die("Connection failed: ". mysqli_connect_error());
}
?>
registration.php
<!DOCTYPE html>
<html>
<head>
<meta charset ="utf-8">
<title>Registartion</title>
<link rel ="stylesheet"href="style.css"/>
</head>
<body>
<?php
require "connect.inc.php";
if(isset($_REQUEST["username"])){
$username =stripslashes($_REQUEST["username"]);
$username =mysqli_real_escape_string($conn,$username);
$email =stripslashes($_REQUEST["email"]);
$email =mysqli_real_escape_string($conn,$email);
$password =stripslashes($_REQUEST["password"]);
$password =mysqli_real_escape_string($conn,$password);
$trn_date = date("Y-m-d H:i:s");
$query ="INSERT INTO `users2` (username,password,email,trn_date) VALUES('$username','".md5($password)."','$email','$trn_date')";
$result =mysqli_query($conn,$query);
if($result){
echo "<div class='form'>
<h3>You are registered succesfully</h3><br>
Click here to <a href='login.php'>Log in</a>
</div>";
}
}else{
?>
<div class="form">
<h1>Registration</h1>
<form name="registration" action ="registration.php" method="post">
<input type="text" name ="username" placeholder ="Username" required/>
<input type="text" name ="email" placeholder ="Email" required/>
<input type="password" name ="password" placeholder ="password" required/>
<input type="submit" type="submit" value="Register"/>
</form>
</div><!--form-->
<?php } ?>
</body>
</html>
login.php
<!DOCTYPE html>
<html>
<head>
<meta charset ="utf-8">
<title>Login</title>
<link rel ="stylesheet"href="style.css"/>
</head>
<body>
<?php
//ini_set('display_errors','1');
//error_reporting(E_ALL);
require "connect.inc.php";
session_start();
if(isset($_POST["username"])){
$username = stripslashes($_REQUEST["username"]);
$username = mysqli_real_connect($conn,$username);
$username = mysqli_real_escape_string($conn,$password);
$query ="SELECT * FROM `users` WHERE username ='$username' and password ='".md5($password)."' ";
$result =mysqli_query($conn,$query) or die(mysql_error());
$rows = mysqli_num_rows($result);
if($rows==1){
$_SESSION["username"] = $username;
header("Location: index.php");
}else{
echo "<div class='form'>
<h3>Username/password is incorrect</h3><br>
Click here to <a href='login.php'>Login</a>
</div>";
}
}else{
?>
<div class="form">
<h1>Login </h1>
<form action="login.php" method="post" name="login">
<input type="text" name ="username" placeholder ="Username" required/>
<input type="passowrd" name ="password" placeholder ="password" required/>
<input type="submit" type="submit" value="Login"/>
</form>
</div>
<?php } ?>
</body>
</html>
logout.php
<?php
session_start();
if(session_destroy()){
header("Location: login.php");
}
?>
index.php
<?php
include("auth.php");
?>
<!DOCTYPE html>
<html>
<head>
<meta charset="utf-8">
<title>Welcome home</title>
</head>
<body>
<div class="form">
<p>Welcome <?php echo $_SESSION["username"];?></p>
<p>This is secure area</p>
<a href="logout.php">Logout</a>
</div>
</body>
</html>
我们将不胜感激任何帮助。谢谢。
请注意,这只是为了学习目的。我知道有瑕疵但请放轻松
只要改变这个,
$username = stripslashes($_REQUEST["username"]);
$username = mysqli_real_connect($conn,$username);
$password =stripslashes($_REQUEST["password"]);
$password = mysqli_real_escape_string($conn,$password);
以下,
$username = stripslashes($_REQUEST['username']);
$username = mysqli_real_escape_string($conn, $username);
$password = stripslashes($_REQUEST['password']);
$password = mysqli_real_escape_string($conn, $password);
我希望您只有一个用户与数据库中输入的凭据相关。希望对你有帮助!
谢谢我解决了..问题是 login.php 中的这一行 $query ="SELECT * FROM users WHERE username ='$username' and password ='".md5($password)."' ";
..
正确的应该是这个
$query ="SELECT * FROM `users2` WHERE username ='$username' and password ='".md5($password)."' ";
我正在检查用户 table 中的数据,而我在用户 2 table 中注册。因为我有很多 table 造成混淆
我是 PHP 的新手,正在遵循 login_registration 脚本,注册过程正常,用户已添加到数据库中,但是,当我尝试登录时,它显示错误 I检查 php.error 登录 wamp 服务器,它说,
PHP 1. {main}() C:\wamp64\www\php\login_register_system\login.php:0
这是我的代码
connect.inc.php
<?php
//$conn_error = "could not connect";
$mysql_host= "localhost";
$mysql_user = "root";
$mysql_pass ="";
$mysql_db ="a_database";
$conn = mysqli_connect($mysql_host,$mysql_user,$mysql_pass,$mysql_db);
/*if(!mysqli_connect($mysql_host,$mysql_user,$mysql_pass) && !mysqli_select_db($mysql_db)){
die($conn_error);
}
*/
if(!$conn){
die("Connection failed: ". mysqli_connect_error());
}
?>
registration.php
<!DOCTYPE html>
<html>
<head>
<meta charset ="utf-8">
<title>Registartion</title>
<link rel ="stylesheet"href="style.css"/>
</head>
<body>
<?php
require "connect.inc.php";
if(isset($_REQUEST["username"])){
$username =stripslashes($_REQUEST["username"]);
$username =mysqli_real_escape_string($conn,$username);
$email =stripslashes($_REQUEST["email"]);
$email =mysqli_real_escape_string($conn,$email);
$password =stripslashes($_REQUEST["password"]);
$password =mysqli_real_escape_string($conn,$password);
$trn_date = date("Y-m-d H:i:s");
$query ="INSERT INTO `users2` (username,password,email,trn_date) VALUES('$username','".md5($password)."','$email','$trn_date')";
$result =mysqli_query($conn,$query);
if($result){
echo "<div class='form'>
<h3>You are registered succesfully</h3><br>
Click here to <a href='login.php'>Log in</a>
</div>";
}
}else{
?>
<div class="form">
<h1>Registration</h1>
<form name="registration" action ="registration.php" method="post">
<input type="text" name ="username" placeholder ="Username" required/>
<input type="text" name ="email" placeholder ="Email" required/>
<input type="password" name ="password" placeholder ="password" required/>
<input type="submit" type="submit" value="Register"/>
</form>
</div><!--form-->
<?php } ?>
</body>
</html>
login.php
<!DOCTYPE html>
<html>
<head>
<meta charset ="utf-8">
<title>Login</title>
<link rel ="stylesheet"href="style.css"/>
</head>
<body>
<?php
//ini_set('display_errors','1');
//error_reporting(E_ALL);
require "connect.inc.php";
session_start();
if(isset($_POST["username"])){
$username = stripslashes($_REQUEST["username"]);
$username = mysqli_real_connect($conn,$username);
$username = mysqli_real_escape_string($conn,$password);
$query ="SELECT * FROM `users` WHERE username ='$username' and password ='".md5($password)."' ";
$result =mysqli_query($conn,$query) or die(mysql_error());
$rows = mysqli_num_rows($result);
if($rows==1){
$_SESSION["username"] = $username;
header("Location: index.php");
}else{
echo "<div class='form'>
<h3>Username/password is incorrect</h3><br>
Click here to <a href='login.php'>Login</a>
</div>";
}
}else{
?>
<div class="form">
<h1>Login </h1>
<form action="login.php" method="post" name="login">
<input type="text" name ="username" placeholder ="Username" required/>
<input type="passowrd" name ="password" placeholder ="password" required/>
<input type="submit" type="submit" value="Login"/>
</form>
</div>
<?php } ?>
</body>
</html>
logout.php
<?php
session_start();
if(session_destroy()){
header("Location: login.php");
}
?>
index.php
<?php
include("auth.php");
?>
<!DOCTYPE html>
<html>
<head>
<meta charset="utf-8">
<title>Welcome home</title>
</head>
<body>
<div class="form">
<p>Welcome <?php echo $_SESSION["username"];?></p>
<p>This is secure area</p>
<a href="logout.php">Logout</a>
</div>
</body>
</html>
我们将不胜感激任何帮助。谢谢。
请注意,这只是为了学习目的。我知道有瑕疵但请放轻松
只要改变这个,
$username = stripslashes($_REQUEST["username"]);
$username = mysqli_real_connect($conn,$username);
$password =stripslashes($_REQUEST["password"]);
$password = mysqli_real_escape_string($conn,$password);
以下,
$username = stripslashes($_REQUEST['username']);
$username = mysqli_real_escape_string($conn, $username);
$password = stripslashes($_REQUEST['password']);
$password = mysqli_real_escape_string($conn, $password);
我希望您只有一个用户与数据库中输入的凭据相关。希望对你有帮助!
谢谢我解决了..问题是 login.php 中的这一行 $query ="SELECT * FROM users WHERE username ='$username' and password ='".md5($password)."' ";
..
正确的应该是这个
$query ="SELECT * FROM `users2` WHERE username ='$username' and password ='".md5($password)."' ";
我正在检查用户 table 中的数据,而我在用户 2 table 中注册。因为我有很多 table 造成混淆