PHP8：為什麼成為開發高效能的首選？

// PHP7
function fibonacci($n) {
    if ($n <= 1) {
        return $n;
    } else {
        return fibonacci($n - 1) + fibonacci($n - 2);
    }
}

$start = microtime(true);
fibonacci(35);
$end = microtime(true);
$executionTime = $end - $start;
echo "Execution time for PHP7: " . $executionTime . " seconds
";

// PHP8
function fibonacci($n) {
    if ($n <= 1) {
        return $n;
    } else {
        return fibonacci($n - 1) + fibonacci($n - 2);
    }
}

$start = microtime(true);
fibonacci(35);
$end = microtime(true);
$executionTime = $end - $start;
echo "Execution time for PHP8: " . $executionTime . " seconds
";

class User {
    private int $id;
    private string $name;
    
    public function __construct(int $id, string $name) {
        $this->id = $id;
        $this->name = $name;
    }
    
    public function getId(): int {
        return $this->id;
    }
    
    public function getName(): string {
        return $this->name;
    }
}

$user = new User(1, "John Doe");
echo "User ID: " . $user->getId() . "
";
echo "User Name: " . $user->getName() . "
";

$pattern = '/[0-9]+/';
$subject = 'Hello123World456';
preg_match($pattern, $subject, $matches);
print_r($matches);