php中的静态变量是否会持续存在于请求中？

不,虽然静态变量将保留当前请求,但您需要将其添加到会话中以在请求之间保持其值.

例:

session_start();

class Car {
    public static $make;
    public function __construct($make) {
        self::$make = $make;
    }
}

$c = new Car('Bugatti');
echo '
' . Car::$make . '
';
unset($c);

if (!isset($_SESSION['make'])) {
    echo '
' . Car::$make . '
';
    $c = new Car('Ferrari');
    echo '
' . Car::$make . '
';
}

$_SESSION['make'] = Car::$make;

echo '
' . $_SESSION['make'] . '
';