How to return the user to the main page if they are not logged in or close the session

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How to return the user to the main page if they are not logged in or close the session

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#1 by (2 votes)

0

I need to know how to get the user returned to login.php if he does not have the session started. This is my code:

login.php

<?php
// Include config file
require ('connection.php');

if (isset($_POST['usuario']) and isset($_POST['contrasena'])){
//3.1.1 Assigning posted values to variables.
$usuario = $_POST['usuario'];
$contrasena = $_POST['contrasena'];
//3.1.2 Checking the values are existing in the database or not
$query = "SELECT * FROM usuarios WHERE usuario='$usuario' and contrasena='$contrasena'";

$result = mysqli_query($connection, $query) or die(mysqli_error($connection));
$count = mysqli_num_rows($result);
//3.1.2 If the posted values are equal to the database values, then session will be created for the user.
if ($count == 1){
$_SESSION['usuario'] = $usuario;
}else{
//3.1.3 If the login credentials doesn't match, he will be shown with an error message.
$fmsg = "Invalid Login Credentials.";
}
}
//3.1.4 if the user is logged in Greets the user with message
if (isset($_SESSION['usuario'])){
$usuario = $_SESSION['usuario'];
header('Location: menu-ppal.php');

}else{
//3.2 When the user visits the page first time, simple login form will be displayed.

?>

<html>
<head>
    <title>Iniciar Sesion</title>

<!-- Latest compiled and minified CSS -->
<link rel="stylesheet" href="https://maxcdn.bootstrapcdn.com/bootstrap/3.3.7/css/bootstrap.min.css" >

<!-- Optional theme -->
<link rel="stylesheet" href="https://maxcdn.bootstrapcdn.com/bootstrap/3.3.7/css/bootstrap-theme.min.css" >

<link rel="stylesheet" href="styles.css" >

<!-- Latest compiled and minified JavaScript -->
<script src="https://maxcdn.bootstrapcdn.com/bootstrap/3.3.7/js/bootstrap.min.js"></script>
</head>
<body>

<div class="container">
      <form class="form-signin" method="POST">
      <?php if(isset($fmsg)){ ?><div class="alert alert-danger" role="alert"> <?php echo $fmsg; ?> </div><?php } ?>
        <h2 class="form-signin-heading">Please Login</h2>
        <div class="input-group">
      <span class="input-group-addon" id="basic-addon1">Nombre de Usuario</span>
      <input type="text" name="usuario" class="form-control" placeholder="Nombre de usuario" required>
    </div>
        <label for="inputPassword" class="sr-only">Contraseña</label>
        <input type="password" name="contrasena" id="contrasena" class="form-control" placeholder="Contraseña" required>
        <button class="btn btn-lg btn-primary btn-block" type="submit">Acceder</button>
      </form>
</div>

</body>

</html>
<?php } ?>

menu-ppal.php

<?php
require ('connection.php');



?>
<html dir="ltr" lang="es">
  <head>
    <meta content="text/html; charset=utf-8" http-equiv="content-type">
    <title>Menú Principal</title>
  </head>
  <body>
  <a href="logout.php">Cerrar Sesion</a><br>
    <div>
      <table style="width: 70%;" border="0">
        <tbody>
          <tr>
            <td style="text-align: center; width: 33%; background-color: white;"><img

                style="width: 166px; height: 166px;" alt="icono-buques" src="img/Icono%20Buques.png"></td>
            <td style="text-align: center; width: 33%; margin-left: 36px; background-color: white;"><img

                style="width: 166px; height: 166px;" alt="icono-nominaciones" src="img/Icono%20Nominaciones.png"><br>
            </td>
            <td style="width: 33%; text-align: center; background-color: white; height: 170.95px;"><img

                style="width: 166px; height: 166px;" alt="icono-documentos" src="img/Icono%20Documentos.png"><br>
            </td>
          </tr>
          <tr>
            <td style="width: 33%; text-align: center; background-color: white;"><br>
            </td>
            <td style="width: 33%; text-align: center; background-color: white;"><br>
            </td>
            <td style="width: 33%; text-align: center; background-color: white;"><br>
            </td>
          </tr>
        </tbody>
      </table>
    </div>
  </body>
</html>

mysql html php login

asked by eduardoimm 27.01.2018 в 03:24

source

1 answer

Capture pointer movement in Google Maps Send view parameters to the controller With angularjs

score 2 · Accepted Answer

You can occupy the value of $_SESSION['usuario'] , if it does not exist, return it to the login. Do some service, class or something that validates that there is that value.

if (isset($_SESSION['usuario'])) {
    //si existe
} else {
    //no existe, debes redireccionar
}