I'm trying to make a comparison after session_start();
What I was thinking and trying to do is:
<?php
session_start();
if($_SESSION['id_usuario']=NULL) {
$_SESSION['id_nivel']=3;
if($_SESSION['id_usuario']= 'X') {
}
}
else {
header("Location: register.php");
}
?>
Is there a possibility to do it? Any help to achieve it?
When you compare values in a condition is done with == or === , what you are doing is an assignment simply with = , then your code should be.
Now if you want to validate that the user exists, you could do it with isset directly on the $_SESSION['id_usuario']
<?php
session_start();
if($_SESSION['id_usuario']=== NULL) {
$_SESSION['id_nivel']=3;//asignas a 3
if(isset($_SESSION['id_usuario']) {//Si está definido el id_usuario
// $iduser = $_SESSION['id_usuario'];
// $con = "SELECT * FROM usuarios WHERE id_usuario = $iduser;
// Agregue estos comentarios con posibilidad de hacer una consulta y traer
// los datos existentes a "X". Pero nose si esto seria lo correcto.
}
}
else {
header("Location: register.php");
}
?>