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

(PHP 5 < 5.3.0) Check if RPL parse is enabled

(PHP 5 < 5.4.0) Alias for

(PHP 5 < 5.4.0) Alias for

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

(PHP 5 < 5.3.0) Disable RPL parse bool my

(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