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

(PHP 5 >= 5.1.0, PHP 7) Get result of SHOW WARNINGS

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

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

(PHP 5, PHP 7) Binds variables to a prepared statement as parameters

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

(PHP 5, PHP 7) Set result pointer to a specified field offset

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

(PHP 5, PHP 7) Transfers a result set from a prepared statement

(PHP 5, PHP 7) Binds variables to a prepared statement for result storage