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

(PHP 5, PHP 7) Returns whether thread safety is given or not

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

(PHP 5, PHP 7) Returns the error code from last connect call

(PHP 5, PHP 7) Execute an SQL query bool mysqli::real_query

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

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

(PHP 5, PHP 7) Dump debugging information into the log

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

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