(PHP 5, PHP 7) Prepare an SQL statement for execution

(PHP 5, PHP 7) Fetch a result row as an associative array

(PHP 5, PHP 7) Returns the version of the MySQL server

(PHP 5, PHP 7) Get the ID generated from the previous INSERT operation

(PHP 5, PHP 7) Changes the user of the specified database connection

(PHP 5, PHP 7) Selects the default database for database queries

(PHP 5, PHP 7) Pings a server connection, or tries to reconnect if the connection has gone down

(PHP 5 >= 5.3.0, PHP 7) Gets a result set from a prepared statement

(PHP 5 >= 5.5.0, PHP 7) Starts a transaction

(PHP 5, PHP 7) Turns on or off auto-committing database modifications