Este sistema de login consta en 7 archivos simples y fáciles de entender:
login.html
<form name="login" method="post" action="login.php">
Username: <input name="username" class="textbox" type="text"></br>
Password: <input name="password" class="textbox" type="password"></br>
<input name="login" value="Login" class="button" type="submit"></br>
</form>
login.php
<?php
class login
{
public $user;
public $post_password;
public $query;
public $mysql_password;
public $error;
public $ok;
public $numrows;
public $fields;
public function __construct($username, $password)
{
include "config.php";
$this->user = $username;
$this->post_password = $password;
$this->query = mysql_query("SELECT * FROM users WHERE username = '".$this->user."'");
$this->mysql_password = mysql_fetch_array($this->query);
$this->numrows = mysql_num_rows($this->query);
$this->error = "Nombre de usuario o contraseña incorrectos.";
$this->ok = "Bienvenido ".$this->user.". Te has logueado correctamente. <a href='menu.html'>Ir al Menú Principal</a>";
$this->fields = "Por favor, rellena todos los campos.";
}
public function check()
{
if($this->user && $this->post_password)
{
if($this->numrows !=0)
{
if($this->mysql_password['password'] == md5($this->post_password))
{
session_start();
$_SESSION['username'] = $this->user;
echo $this->ok;
}
else
{
echo $this->error;
}
}
else
{
echo $this->error;
}
}
else
{
echo $this->fields;
}
}
}
include_once "clear.php";
$login = new login(clear($_POST['username']), clear($_POST['password']));
echo $login->check();
?>
register.html
<form action='register.php' method='POST'>
Fullaname: <input type='text' name='fullname' class="textbox"></br>
Username: <input type='text' name='username' class="textbox"></br>
Password: <input type='password' name='password' class="textbox"></br>
Repeat Password: <input type='password' name='repeatpassword' class="textbox"></br>
E-Mail: <input type='text' name='email' class="textbox"></br>
<input type='submit' name='submit' value='Register' class="button">
</form>
register.php
<?php
class register
{
public $user;
public $password;
public $repassword;
public $email;
public $fullname;
public $query;
public $numrows;
public $error;
public $error2;
public $error3;
public $error4;
public $ok;
public $fields;
public $regquery;
public function __construct($username, $password, $repeatpassword, $email, $fullname)
{
include "config.php";
$this->user = $username;
$this->password = $password;
$this->repassword = $repeatpassword;
$this->email = $email;
$this->fullname = $fullname;
$this->query = mysql_query("SELECT * FROM users WHERE username = '".$this->user."'");
$this->numrows = mysql_num_rows($this->query);
$this->error = "Nombre de usuario en uso.";
$this->error2 = "Las contraseñas no coinciden";
$this->error3 = "Nombre completo y/o nombre de usuarios superan los 25 caracteres.";
$this->error4 = "La contraseña debe tener un minimo de 6 caracteres y un maximo de 25";
$this->ok = "Te has registrado correctamente";
$this->fields = "Por favor, rellena todos los campos.";
}
public function check()
{
if($this->numrows!=0)
{
die ($this->error);
}
if($this->user&&$this->password&&$this->email&&$this->fullname)
{
if($this->password == $this->repassword)
{
if(strlen($this->username)>25||strlen($this->fullname)>25)
{
echo $this->error3;
}
else
{
if(strlen($this->password)>25||strlen($this->password)<6)
{
echo $this->error4;
}
else
{
$this->password = md5($this->password);
$register = mysql_query("INSERT INTO `users` (`id`, `fullname`, `username`, `password`, `email`, `admin`) VALUES (NULL, '".$this->fullname."', '".$this->user."', '".$this->password."', '".$this->email."', '0')");
echo $this->ok;
}
}
}
else
{
echo $this->error2;
}
}
else
{
echo $this->fields;
}
}
}
include_once "clear.php";
$reg = new register(clear($_POST['username']), clear($_POST['password']), clear($_POST['repeatpassword']), clear($_POST['email']), clear($_POST['fullname']));
echo $reg->check();
?>
clear.php
<?php
function clear($texto)
{
$limpio = strip_tags($texto);
$limpio = htmlspecialchars($limpio);
$limpio = stripslashes($limpio);
return $limpio;
}
?>
config.php
<?php
$error1 = 'Problem connecting to Host';
$error2 = 'Problem connecting to MySQL';
$connect = mysql_connect ('127.0.0.1','root','root') or die($error1);
$db = mysql_select_db ('repEjec') or die($error2);
?>
menu.html
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<title>Index</title>
</head>
<body>
<h1>Menú Principal</h1>
</body>
</html>
