(PHP 5 >= 5.1.0, PHP 7, PECL pdo >= 0.2.0) Executes an SQL statement, returning a result set as a PDOStatement

(PHP 5 >= 5.1.0, PHP 7, PECL pdo >= 0.1.0) Prepares a statement for execution and returns a statement

(PHP 5 >= 5.1.0, PHP 7, PECL pdo >= 0.1.0) Fetch the SQLSTATE associated with the last operation on the

(PHP 5 >= 5.1.0, PHP 7, PECL pdo >= 0.1.0) Creates a PDO instance representing a connection to a database

(PHP 5 >= 5.1.0, PHP 7, PECL pdo >= 0.2.0) Retrieve a database connection attribute