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    Ds\Stack::peek

    (PECL ds >= 1.0.0)

    Ds\Stack::peek — Returns 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.

    Parameters

    This function has no parameters.

    Return Values

    The value at the top of the stack.

    Errors/Exceptions

    UnderflowException if empty.

    Examples

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

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

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

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

    The above example will output something similar to:

    string(1) "c"

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