If, Else, আর Switch

<?php
  $score = 72;
  if ($score >= 90) {
    echo "Grade: A";
  } elseif ($score >= 75) {
    echo "Grade: B";
  } elseif ($score >= 60) {
    echo "Grade: C";
  } else {
    echo "Grade: F";
  }
?>

<?php
  $day = "Mon";
  switch ($day) {
    case "Mon":
    case "Tue":
    case "Wed":
    case "Thu":
    case "Fri":
      echo "Weekday";
      break;
    case "Sat":
    case "Sun":
      echo "Weekend";
      break;
    default:
      echo "Not a valid day";
  }
?>

<?php
  $age = 20;
  $status = ($age >= 18) ? "adult" : "minor";
  echo $status; // "adult"
?>

<?php
  $name = $_GET["name"] ?? "Guest";
  echo $name; // "Guest" if no ?name= was in the URL
?>