//validar.php
<?php
extract($_POST);
include("../config.php");
include("class_mysql.php");
$miconexion = new DB_mysql;
$miconexion->conectar($db_data,$db_host,$db_user, $db_pass);

$clave=md5($clave);
$miconexion->consulta("select * from usuarios where username='$usuario' and password='$clave'");

$lista=$miconexion->verconsulta_lista();
if ($lista[0]!=NULL) {
	session_start();
	$_SESSION['id']=$lista[0];
	$_SESSION['nombre']=$lista[1];
	$_SESSION['rol']=$lista[6];
	echo "<script>location.href='$url_site/resources/admin/admin.php'</script>";
}else{
	echo '<script>alert("Datos Incorrectos")</script>';
	echo "<script>location.href='$url_site/public_html'</script>";
}

?>



//salir.php
<?php
	session_start();
	session_destroy();
	session_unset($_SESSION['nombre']);
	$_SESSION['nombre']=NULL;
	echo '<script>alert("Ingreso Ilegal...")</script>';
	echo "<script>location.href='../../public_html'</script>";
	exit();
?>

//clase_mysql
function verconsulta_lista(){
		while ( $row=mysql_fetch_row($this->Consulta_ID)) {
			for ($i=0; $i < $this->numcampos(); $i++) {
				$row[$i];
			}
			return $row;
		}
	}




//index

<?php
				session_start();
				if(@$_SESSION['id']==NULL){
					include("../resources/template/register.php");
					include("../resources/template/login.php");
				}else{
					echo "Usuario ya ingresado:".$_SESSION['nombre'];
					echo "<a href='../resources/library/salir.php'>Salir</a>";
				}
			?>