The UnderflowException class

(PHP 5 >= 5.1.0, PHP 7, PHP 8)

簡介

Exception thrown when performing an invalid operation on an empty container, such as removing an element.

class UnderflowException extends RuntimeException {

/* 繼承的屬性 */

protected string $message = "";

private string $string = "";

protected int $code;

protected string $file = "";

protected int $line;

private array $trace = [];

private ?Throwable $previous = null;

/* 繼承的方法 */

final public Exception::getMessage(): string

final public Exception::getCode(): int

final public Exception::getFile(): string

final public Exception::getLine(): int

final public Exception::getTrace(): array

}