/**
* Recursively removes entries containing ':unknown' in key from input array.
*
* @param array $in the input array
* @return array the filtered array
*/
function _filterUseless($in)
{
$out = array();
if (is_array($in)) {
foreach ($in as $key => $value) {
if (strpos($key, 'unknown:') === false && !in_array($key, PhotoQExif::_getUselessTagNames())) {
if (is_array($value)) {
$out[$key] = PhotoQExif::_filterUseless($value);
} else {
$out[$key] = PhotoQExif::_sanitizeExifValue($value);
}
}
}
}
return $out;
}
