use Thesis\Endian;

echo Endian\Order::network->unpackInt32(
    Endian\Order::network->packInt32(-200),
); // -200

use Thesis\Endian;

echo Endian\Order::big->unpackInt8(
    Endian\Order::big->packInt8(17),
); // 17

use Thesis\Endian;

echo Endian\Order::little->unpackFloat(
    Endian\Order::little->packFloat(2.2),
); // 2.2

use Thesis\Endian;
use BcMath\Number;

echo Endian\Order::native()
    ->unpackInt64(
        Endian\Order::native()->packInt64(new Number('9223372036854775807')),
    )
    ->value; // 9223372036854775807