Exceptions
PHP Manual

The UnderflowException class

(PHP 5 >= 5.1.0)

Introdução

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

Sinopse da classe

UnderflowException extends RuntimeException {
/* Métodos herdados */
final public string Exception::getMessage ( void )
final public int Exception::getCode ( void )
final public string Exception::getFile ( void )
final public string Exception::getLine ( void )
final public array Exception::getTrace ( void )
final public string Exception::getTraceAsString ( void )
public string Exception::__toString ( void )
final private string Exception::__clone ( void )
}
Exceptions
PHP Manual