Minabo PHP

<?php
$miarray = array(
    128 => 1,
    64  => 0,
    32  => 1,
    16  => 0,
    8   => 1,
    4   => 1,
    2   => 1,
    1   => 0,   );

$suma=0;
foreach ($miarray as $indice => $clave)
{    if($clave==1){
    $suma += $indice;
    }
}
echo $suma;
?>