Specifies that the fetch method shall return each row as an array
indexed by column name as returned in the corresponding result set.
FETCH_NUM
FETCH_NUM
Specifies that the fetch method shall return each row as an array
indexed by column number as returned in the corresponding result set,
starting at column 0.
FETCH_BOTH
FETCH_BOTH
Specifies that the fetch method shall return each row as an array
indexed by both column name and number as returned in the corresponding
result set, starting at column 0.