// $str contains "qlow-200px" or "200px" strings because thumb.php would strip the filename
// first - check if the string begins with "qlow-", and if so, treat it as quality.
// Pass the first portion, or the whole string if "qlow-" not found, to the parent
// $str contains "qlow-200px" or "200px" strings because thumb.php would strip the filename
// first - check if the string begins with "qlow-", and if so, treat it as quality.
// Pass the first portion, or the whole string if "qlow-" not found, to the parent