Php Or operator doesn´works propertly

I´m trying to use or operator in a php sentence but only validate the first condition, what´s wrong?

if ($_SESSION['user_id'] != 4 || $_SESSION['rol'] != 1) 
{
//exit
}else{
  //do something
}```
 

>Solution :

You should invert the condition in this way:

if ($_SESSION['user_id'] == 4 || $_SESSION['rol'] == 1) 
  //it's ok
else
  //exit

Because otherwise if the user_id is 4 it will otherwise fail if it doesn’t have the role expected