Strict standards error

[djeraseit]

Error when trying to use the class per your README. PHP version is 5.4.45

PHP Strict Standards: Declaration of Nemiro\Nginx\DirectiveGroup::AddDirective() should be compatible with Nemiro\Nginx\Directive::AddDirective($nameOrInstance, $parameters = NULL, $childs = NULL) in /var/www/html/nginx/DirectiveGroup.php on line 74
NULL
PHP Fatal error: Call to a member function ContainsChild() on a non-object in /var/www/html/nginx.php on line 11
This is my line 11:

if ($conf['server']->ContainsChild('listen'))

[alekseynemiro]

I'm not tested in PHP 5.4.
Minimal version - 5.5.

[hemratna]

I am facing this issue on PHP 7.3