PHP 8.1: MySQLi:
mysqli_driver->driver_version property is deprecated
mysqli_driver->driver_version property from the MySQLi extension is deprecated in PHP 8.1.
$driver = new mysqli_driver(); echo $driver->driver_version; // 101009
Deprecated: The driver_version property is deprecated in ... on line ...
mysqli_driver->driver_version property was not updated for many years, at least since 2007, and the driver version is a useless value because despite the changes in the driver (such as default error mode change in PHP 8.1), the driver version has not changed.
Backwards Compatibility Impact
mysqli_driver->driver_version will emit a deprecation notice in PHP 8.1, and will be removed in PHP 9.0.
Because this value has not changed for over a decade, it is safe to drop any version number checks that used the
driver_version property. Any code that needs to determine the driver version can use the standard