ফাংশন

<?php
  function greet($name) {
    return "Hello, $name!";
  }

  echo greet("Priya"); // "Hello, Priya!"
?>

<?php
  function greet($name = "Guest") {
    return "Hello, $name!";
  }

  echo greet();        // "Hello, Guest!"
  echo greet("Amit");  // "Hello, Amit!"
?>

<?php
  function add(int $a, int $b): int {
    return $a + $b;
  }

  echo add(2, 3); // 5
  // add("two", 3); // TypeError — "two" cannot be coerced to an int
?>

<?php
  function minMax(array $numbers): array {
    return ["min" => min($numbers), "max" => max($numbers)];
  }

  $result = minMax([4, 9, 1, 7]);
  echo $result["min"] . " / " . $result["max"]; // "1 / 9"
?>

<?php
  $double = fn($n) => $n * 2;
  echo $double(5); // 10
?>