Ds\Stack::peek

(PECL ds >= 1.0.0)

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

Descrizione

public Ds\Stack::peek(): mixed

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

Elenco dei parametri

Questa funzione non contiene parametri.

Valori restituiti

The value at the top of the stack.

Errori/Eccezioni

UnderflowException if empty.

Esempi

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

<?php
$stack 
= new \Ds\Stack();

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

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

Il precedente esempio visualizzerĂ  qualcosa simile a:

string(1) "c"
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