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

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

(PHP 5, PHP 7) Return the number of rows in statements result set

(PHP 5, PHP 7) Returns the total number of rows changed, deleted, or inserted by the last executed statement

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

(PHP 5, PHP 7) Prepare next result from multi_query

(PHP 5, PHP 7) Frees stored result memory for the given statement handle

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

(PHP 5, PHP 7) Returns SQLSTATE error from previous statement operation

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