Ds\Stack::peek

(PECL ds >= 1.0.0)

Ds\Stack::peekReturns the value at the top of the stack

Descrição

public Ds\Stack::peek ( void ) : mixed

Returns the value at the top of the stack, but does not remove it.

Parâmetros

Esta função não possui parâmetros.

Valor Retornado

The value at the top of the stack.

Erros

UnderflowException if empty.

Exemplos

Exemplo #1 Ds\Stack::peek() example

<?php
$stack 
= new \Ds\Stack();

$stack->push("a");
$stack->push("b");
$stack->push("c");

var_dump($stack->peek());
?>

O exemplo acima irá imprimir algo similar à:

string(1) "c"