//Nested Conditional Statements

function both($first, $second)
{
  if ($first){
    if ($second){
      return "both";
    } else {
      return "not both";
    }
  } else {
    return "not both";
  }
}

echo both(TRUE, TRUE);
echo "\n\n";
echo both(FALSE, FALSE);
echo "\n\n";
echo both(TRUE, FALSE);

// The || Operator

function willWeEat($meal_type, $is_hungry){
  if ($meal_type === "dessert" || $is_hungry){
    return "Yum. Thanks!";
  } else {
    return "No thanks. We're not hungry.";
  }
}
echo willWeEat("dessert", false);
echo "\n\n";
echo willWeEat("dinner", false);

// The && Operator

function clapYourHands($is_happy, $knows_it){
  if ($is_happy && $knows_it){
    return "CLAP!";
  } else {
    return ":(";
  }
}
echo clapYourHands(TRUE, TRUE);
echo "\n\n";
echo clapYourHands(TRUE, FALSE);

// The Not Operator

function duckDuckGoose($is_goose){
  if (!$is_goose){
    return "duck";
  } else {
    return "goose!";
  }
}
echo duckDuckGoose(FALSE);
echo "\n";
echo duckDuckGoose(FALSE);
echo "\n";
echo duckDuckGoose(TRUE);

// The Xor Operator

function eatPie($ingredients){
  if (in_array("chicken", $ingredients) xor in_array("bananas", $ingredients)){
    return "Delicious pie!";
  } else {
    return "Disgusting!";
  }
}

echo eatPie($banana_cream);
echo "\n\n";
echo eatPie($experimental_pie);

// Alternative

$is_admin = FALSE;
$is_user = TRUE;
if ($is_admin or $is_user){
  echo "You can change the password.\n";
}


$correct_pin = TRUE;
$sufficient_funds = TRUE;
if ($correct_pin and $sufficient_funds){
  echo "You can make the withdrawal.";
}

// Includes

  include "top_bread.php";
  include "mayo.php";
  include "lettuce.php";

  echo "Sliced, ripe tomatoes\nBacon\nTurkey\n";

  include "bottom_bread.php";