As the str_getcsv(), unlike to fgetcsv(), does not parse the rows in CSV string, I have found following easy workaround:
<?php
$Data = str_getcsv($CsvString, "\n"); //parse the rows
foreach($Data as &$Row) $Row = str_getcsv($Row, ";"); //parse the items in rows
?>
Why not use explode() instead of str_getcsv() to parse rows? Because explode() would not treat possible enclosured parts of string or escaped characters correctly.