<?php
include "conexao/conexao_mysql.php";
$iniciarConexao = new conexao_mysql();
$iniciarConexao ->conecta();

session_start();

$_SESSION['usuario_libarado'];
$_SESSION['senha_libarado'];

$sql = "select * from usuarios where usuario = '$login' and senha = '$senha'";
$query = mysql_query($sql) or die (mysql_error());

while($listar = mysql_fetch_array($query)){
    $nome = $listar['nome'];
}
if(!isset($_SESSION['usuario_libarado']) AND !isset($_SESSION['senha_libarado'])){

    header("Location: login.php");

}
?>