mysqli_change_user mysqli->change_user() Changes the user of the specified database connection &reftitle.description; Procedural style: boolmysqli_change_user mysqlilink stringuser stringpassword stringdatabase Object oriented style (method): mysqli boolchange_user stringuser stringpassword stringdatabase Changes the user of the specified database connection and sets the current database. In order to successfully change users a valid username and password parameters must be provided and that user must have sufficient permissions to access the desired database. If for any reason authorization fails, the current user authentication will remain. &reftitle.parameters; &mysqli.link.description; user The MySQL user name. password The MySQL password. database The database to change to. If desired, the &null; value may be passed resulting in only changing the user and not selecting a database. To select a database in this case use the mysqli_select_db function. &reftitle.returnvalues; &return.success; &reftitle.notes; Using this command will always cause the current database connection to behave as if was a completely new database connection, regardless of if the operation was completed successfully. This reset includes performing a rollback on any active transactions, closing all temporary tables, and unlocking all locked tables. &reftitle.examples; query("SET @a:=1"); /* reset all and select a new database */ $mysqli->change_user("my_user", "my_password", "world"); if ($result = $mysqli->query("SELECT DATABASE()")) { $row = $result->fetch_row(); printf("Default database: %s\n", $row[0]); $result->close(); } if ($result = $mysqli->query("SELECT @a")) { $row = $result->fetch_row(); if ($row[0] === NULL) { printf("Value of variable a is NULL\n"); } $result->close(); } /* close connection */ $mysqli->close(); ?> ]]> ]]> &example.outputs; &reftitle.seealso; mysqli_connect mysqli_select_db