When i open the page i get the next message Warning: session_start() [function.session-start]: Cannot send session cache limiter - headers already sent (output started at /home/numat/domains/numata.com.ar/public_html/index.php:1) in /home/numat/domains/numata.com.ar/public_html/verific.php on line 3 the firts lines of index are: <? include("verific.php"); if ($_SESSION["autentificado"] == "YES") { include("backend/connect.php"); $result = mysql_query("SELECT * FROM users WHERE session_client='$loginUser'"); $reg = mysql_fetch_object($result); $username_user = $reg->username_user; $_SESSION["usuario"]=$username_user; $empresa = $reg->empresa_user; $name = $reg->nombre_user; $direccion = $reg->direccion_user; $telefono = $reg->telefono_user; $email = $reg->email_user; $activo = $reg->activado_user; } ?> And the first lines of verific are <? session_name("loginUser"); session_start(); if ($_SESSION["autentificado"] == "YES") { $fechaGuardada = $_SESSION["ultimoAcceso"]; $ahora = date("Y-n-j H:i:s"); $tiempo_transcurrido = (strtotime($ahora)-strtotime($fechaGuardada)); if($tiempo_transcurrido >= 600) { include("logout_user.php"); }else { $_SESSION["ultimoAcceso"] = $ahora; } } ?> Can anyone tell me what's the problem??

On line 1 session_name() is attempting to set the session name. But, you don't start the session until line 2. reverse those two lines and it should fix the problem. <? session_start(); session_name("loginUser"); if ($_SESSION["autentificado"] == "YES") { $fechaGuardada = $_SESSION["ultimoAcceso"]; $ahora = date("Y-n-j H:i:s"); $tiempo_transcurrido = (strtotime($ahora)-strtotime($fechaGuardada)); if($tiempo_transcurrido >= 600) { include("logout_user.php"); }else { $_SESSION["ultimoAcceso"] = $ahora; } } ?> Michael J