}
if (null === $read && '' === $out) {
$write = array_diff($write, array(STDOUT));
}
if (in_array(STDERR, $w) && strlen($err) > 0) {
}
if (null === $read && '' === $out) {
$write = array_diff($write, array(STDOUT));
}
if (in_array(STDERR, $w) && strlen($err) > 0) {