The UnderflowException class

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

Introduction

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

class UnderflowException extends RuntimeException {

/* Inherited properties */

protected string $message = "";

private string $string = "";

protected int $code;

protected string $file = "";

protected int $line;

private array $trace = [];

private ?Throwable $previous = null;

/* Inherited methods */

public Exception::__construct(string $message = "", int $code = 0, ?Throwable $previous = null)

}