(PHP 5, PHP 7) Returns the error code for the most recent function call

(PHP 5, PHP 7) Returns the number of warnings from the last query for the given link

(PHP 5, PHP 7) Commits the current transaction

(PHP 5, PHP 7) Performs a query on the database

(PHP 5, PHP 7) Initializes a statement and returns an object for use with mysqli_stmt_prepare

(PHP 5 >= 5.1.0, PHP 7) Returns a character set object

(PHP 5, PHP 7) Retrieves information about the most recently executed query

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

(PHP 5, PHP 7) Performs debugging operations

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