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Ds\Stack::peek

(PECL ds >= 1.0.0)

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

Description

public Ds\Stack::peek(): mixed

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

Liste de paramètres

Cette fonction ne contient aucun paramètre.

Valeurs de retour

The value at the top of the stack.

Erreurs / Exceptions

UnderflowException if empty.

Exemples

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

<?php
$stack
= new \Ds\Stack();

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

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

Résultat de l'exemple ci-dessus est similaire à :

string(1) "c"
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