(PHP 5 >= 5.1.0, PHP 7, PECL pdo >= 0.1.0) Returns the ID of the last inserted row or sequence value

(PHP 5 >= 5.3.3, Bundled pdo_pgsql, PHP 7) Checks if inside a transaction

(PHP 5 >= 5.1.0, PHP 7, PECL pdo >= 0.1.0) Execute an SQL statement and return the number of affected

(PHP 5 >= 5.1.0, PHP 7, PECL pdo >= 0.1.0) Set an attribute

(PHP 5 >= 5.1.0, PHP 7, PECL pdo >= 0.1.0) Initiates a transaction

(PHP 5 >= 5.1.0, PHP 7, PECL pdo >= 0.9.0) Returns a single column from the next row of a result set

(PHP 5 >= 5.1.0, PHP 7, PECL pdo >= 0.9.0) Closes the cursor, enabling the statement to be executed again

(PHP 5 >= 5.1.0, PHP 7, PECL pdo >= 0.1.0) Rolls back a transaction

(PHP 5 >= 5.1.0, PHP 7, PECL pdo >= 0.2.0) Returns the number of columns in the result set

(PHP 5 >= 5.1.0, PHP 7, PECL pdo >= 0.2.4) Fetches the next row and returns it as an object.