Undefined index HTTP_HOST even though it is checked

Question

Here\'s the code:

if (isset($_SERVER[\'HTTP_HOST\']) === TRUE) {
  $host = $_SERVER[\'HTTP_HOST\'];
}

How is it possible to get an \"Undefined

Answer 1

The HTTP_HOST must always be set if you are running on a browser... then there is no need to check... simply,

$host = $_SERVER['HTTP_HOST'];

is enough