[php-src] Issue #7746: mysqli_sql_exception->getSqlState()

Issue: https://github.com/php/php-src/issues/7746 Comment Author: KapitanOczywisty Besides Reflection you can also access any private or protected property with closure binding. This is useful for over-protected classes. ```php $sqlstate = (function () {return $this->sqlstate; })->call($class); // this also works with arrow functions $sqlstate = (fn () => $this->sqlstate)->call($class); ``` If you need to access private field of base class, use Closure::bindTo, but you can't use an internal class as the second argument. ```php class Bar { private $foo = "Secret"; } class Baz extends Bar {} $class = new Baz(); $foo = (fn() => $this->foo)->bindTo($class, Bar::class)(); ```