Whitespace obfuscator

function obfuscate($code)
{
    $len = strlen($code);
    $obf = '';

    for ($i = 0; $i < $len; $i++) {
        $bin = decbin(ord($code[$i]));
        $bin = ($binLen = strlen($bin) > 7)
                 ? ''
                 : implode('', array_fill(0, 8 - strlen($bin), '0')) . $bin;
        $obf .= str_replace(array('1', '0'), array(chr(9), chr(32)), $bin);
    }

    return $obf;
}

function include_o($file)
{
    $file = trim($file);
    if ( empty($file)
     || !is_readable($file)
    ) {
        throw new Exception("Filename is empty or file isn't readable");
    }

    $string = file_get_contents($file);
    $len    = strlen($string);
    $out    = '';

    for ($i = 0; $i < $len; $i++) {
        $out .= chr(bindec(str_replace(array(chr(9), chr(32)), array('1', '0'), substr($string, $i, 8))));
        $i += 7;
    }

    if (!empty($out)) {
        eval($out);
    }
}