php function numbs for bindec 0011 1111 1111 yield sprintf 04d decbin

<?php
function numbs()
{
    for ($i = 0; $i <= bindec('0011 1111 1111'); ++$i) {
        yield sprintf('%04d', decbin($i));
    }
}
foreach(numbs() as $numb) {
    echo $numb, PHP_EOL;
}