How do I pass undefined vars to functions without E_NOTICE errors?

Question

Pretty simple question really, how do I pass undefined vars to functions without E_NOTICE errors?

When passing undefined variables to functions such as isset(), no e

Answer 1

Maybe something like this will work for you? It's a little bit hackish, but I think what you want is not quite possible without lazy evaluation of function arguments.

if (atLeastOneIsSet($myArray, 1, 3, 4, 6)) doSomething();

function atLeastOneIsSet(array $arr) {
    $args = func_get_args();
    for ($i = 1; $i < func_num_args(); ++$i)
        if (isset($arr[$args[$i]])) return true;
    return false;
}

Edit: oops, logic issues.