mysqli_driver::$report_mode mysqli_report Sets mysqli error reporting mode &reftitle.description; &style.oop; intmysqli_driver->report_mode &style.procedural; boolmysqli_report intflags Depending on the flags, it sets mysqli error reporting mode to exception, warning or none. When set to MYSQLI_REPORT_ALL or MYSQLI_REPORT_INDEX it will also inform about queries that don't use an index (or use a bad index). The default setting is MYSQLI_REPORT_OFF. &reftitle.parameters; flags Name Description MYSQLI_REPORT_OFF Turns reporting off (the default) MYSQLI_REPORT_ERROR Report errors from mysqli function calls MYSQLI_REPORT_STRICT Throw mysqli_sql_exception for errors instead of warnings MYSQLI_REPORT_INDEX Report if no index or bad index was used in a query MYSQLI_REPORT_ALL Set all options (report all) &reftitle.returnvalues; Returns &true;. &reftitle.examples; report_mode = MYSQLI_REPORT_ALL; try { /* if the connection fails, a mysqli_sql_exception will be thrown */ $mysqli = new mysqli("localhost", "my_user", "my_password", "my_db"); /* this query should report an error */ $result = $mysqli->query("SELECT Name FROM Nonexistingtable WHERE population > 50000"); /* this query should report a bad index if the column population doesn't have an index */ $result = $mysqli->query("SELECT Name FROM City WHERE population > 50000"); } catch (mysqli_sql_exception $e) { error_log($e->__toString()); } ]]> 50000"); /* this query should report a bad index if the column population doesn't have an index */ $result = mysqli_query($link, "SELECT Name FROM City WHERE population > 50000"); } catch (mysqli_sql_exception $e) { error_log($e->__toString()); } ]]> query("SELECT Name FROM Nonexistingtable WHERE population > 50000"); /* this WILL NOT report any errors even if index is not available */ $result = $mysqli->query("SELECT Name FROM City WHERE population > 50000"); } catch (mysqli_sql_exception $e) { error_log($e->__toString()); } ]]> &reftitle.seealso; mysqli_sql_exception set_exception_handler error_reporting