Description:
------------
Some examples from the error log (error log is full with this):

1) PHP Fatal error:  Uncaught TypeError: Argument 1 passed to ServiceDb_Session::__construct() must be an instance of DB_Generated_ShopWAWIProduct, instance of ServiceDb_Connection given, called in Factory.php on line 25 and defined in Session.php:41
2) PHP Fatal error:  Uncaught TypeError: Argument 1 passed to ServiceDb_Session::__construct() must be an instance of Smarty_Internal_Template, instance of ServiceDb_Connection given, called in Factory.php on line 25 and defined in Session.php:41
3) PHP Fatal error:  Uncaught TypeError: Argument 1 passed to ServiceDb_Session::__construct() must be an instance of ServiceDb_Connection, instance of ServiceDb_Connection given, called in Factory.php on line 25 and defined in Session.php:41

The session classes are part of an overwritten session handler, that implements the SessionHandlerInterface.
You can see - the method signature of the class somehow is corrupted (interesting in example 3: expectation and actual value is equal)

This happens after we reinvalidate the opcache via files (reinvalidation script below) - within the reinvalidation this type of session with the overwritten sessionhandler is started.
At the moment this problem only occurs within this session classes.
As this happens once - all requests to the server are having this error (the overwritten session system is used in every case).

Problem can be fixed by calling opcache_reset();

This problem did not occur prior to PHP 7.1.9





















Test script:
---------------
Method Signature
class ServiceDb_Connection 
{
    /**
     * @var ServiceDb_Connection 
     */
    private $connection;

    public function __construct(ServiceDb_Connection $connection)
    {
        $this->connection = $connection;
    }
}

Opcache Invalidation Script (invalidates the cache from the project base root):
$opStatus = opcache_get_status(true);
if (is_array($opStatus["scripts"])) {
	foreach ($opStatus["scripts"] as $file => $info) {
		if (strpos($file,BASE_ROOT) === 0) {
			opcache_invalidate($file);
		}
	}
}