如何利用PHP8底层开发原理实现服务器优化

<?php
$code = <<<CODE
    <?php
    function calculateSum(int $n): int {
        $sum = 0;
        for ($i = 1; $i <= $n; $i++) {
            $sum += $i;
        }
        return $sum;
    }
    echo calculateSum(100);
    ?>
CODE;

// 使用JIT编译器优化代码
opcache_compile_string($code);

// 执行代码
eval($code);
?>

<?php
// 压缩数据
$data = "This is a test string.";
$compressedData = zlib_encode($data, ZLIB_ENCODING_GZIP);
echo "Compressed data: " . base64_encode($compressedData) . "
";

// 解压缩数据
$decompressedData = zlib_decode($compressedData);
echo "Decompressed data: " . $decompressedData . "
";
?>

<?php
class User {
    public string $name;
    public int $age;
    
    public function __construct(string $name, int $age) {
        $this->name = $name;
        $this->age = $age;
    }
    
    public function getInfo(): string {
        return "Name: " . $this->name . ", Age: " . $this->age;
    }
}

$user = new User("John Doe", 25);
echo $user->getInfo();
?>

<?php
// 连接Memcached服务器
$memcached = new Memcached();
$memcached->addServer("localhost", 11211);

// 从缓存获取数据
$data = $memcached->get("cached_data");

// 如果缓存中没有数据，则从数据库获取数据并缓存结果
if (!$data) {
    $data = fetchDataFromDatabase();
    $memcached->set("cached_data", $data, 3600);
}

// 使用数据
echo $data;
?>