(PHP 5 >= 5.3.0, PHP 7) Returns the number of columns in the result set

(PHP 5 >= 5.3.0, PHP 7) Returns the type of the nth column

(PHP 5 >= 5.3.0, PHP 7) Returns the name of the nth column

(PHP 5 >= 5.3.0, PHP 7) Fetches a result row as an associative or numerically indexed array or both

(PHP 5 >= 5.3.0, PHP 7) Resets the result set back to the first row

(PHP 5 >= 5.3.0, PHP 7) Closes the result set