Supported Versions: PHP 4, PHP 5, PHP 7, PHP 8
Clean (erase) the contents of the active output buffer and turn it off
<?php ob_end_clean(): bool
<?php         ob_start();

        $result->getRoute()->getHandler()();

        $echoed = ob_get_contents();

        ob_end_clean();



        self::assertSame($message, $echoed);

    }