Returns: An array that corresponds to the lengths of each field in the last row fetched by fbsql_fetch_row(), or FALSE on error.
fbsql_fetch_lengths() stores the lengths of each result column in the last row returned by fbsql_fetch_row(), fbsql_fetch_array() and fbsql_fetch_object() in an array, starting at offset 0.
See also: fbsql_fetch_row().