(PHP 5 >= 5.6.0, PHP 7) Return information about open and cached links

(PHP 5 < 5.4.0) Alias for

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

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

(PHP 5 < 5.3.0) Enable reads from master bool

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

(PHP 5 < 5.4.0) Alias for

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

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

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