mysqli_driver::$report_mode

mysqli_report

Sets mysqli error reporting mode

&reftitle.description;

&style.oop;

`int` `mysqli_driver->report_mode`

&style.procedural;

`true` `mysqli_report` `int` `flags`

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).

As of PHP 8.1.0, the default setting is `MYSQLI_REPORT_ERROR | MYSQLI_REPORT_STRICT`. Previously, it was `MYSQLI_REPORT_OFF`.

&reftitle.parameters;

`flags`

- ## Supported flags

  Name | Description
  `MYSQLI_REPORT_OFF` | Turns reporting off
  `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;

&return.true.always;

&reftitle.changelog;

&Version; | &Description;
8.1.0 | The default value is now `MYSQLI_REPORT_ERROR | MYSQLI_REPORT_STRICT`. Previously, it was `MYSQLI_REPORT_OFF`.

&reftitle.examples;

### &style.oop;

    <?php

    /* activate reporting */
    $driver = new mysqli_driver();
    $driver->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());
    }

### &style.procedural;

    <?php

    /* activate reporting */
    mysqli_report(MYSQLI_REPORT_ALL);

    try {
        /* if the connection fails, a mysqli_sql_exception will be thrown */
        $link = mysqli_connect("localhost", "my_user", "my_password", "my_db");

        /* this query should report an error */
        $result = mysqli_query($link, "SELECT Name FROM Nonexistingtable WHERE population > 50000");

        /* this query should report a bad index if the column population doesn't have an index */
        $result = mysqli_query($link, "SELECT Name FROM City WHERE population > 50000");
    } catch (mysqli_sql_exception $e) {
        error_log($e->__toString());
    }

### Error reporting except bad index errors

    <?php

    /* activate reporting */
    mysqli_report(MYSQLI_REPORT_ERROR | MYSQLI_REPORT_STRICT);

    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 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`