(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

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

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

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

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

(PHP 5, PHP 7) Returns the current row of a result set as an object

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

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