(PHP 5, PHP 7) Performs debugging operations

(PHP 5, PHP 7) Returns the default character set for the database connection

(PHP 5 >= 5.3.0, PHP 7) Get result from async query

(PHP 5, PHP 7) Returns the MySQL client version as a string

(PHP 5 >= 5.5.0, PHP 7) Removes the named savepoint from the set of savepoints of the current transaction

(PHP 5, PHP 7) Returns a string description of the last connect error

(PHP 5 >= 5.3.0, PHP 7) Returns client per-process statistics

(PHP 5, PHP 7) Returns the auto generated id used in the last query

(PHP 5 >= 5.3.0, PHP 7) Poll connections public

(PHP 5, PHP 7) Transfers a result set from the last query