Serializer using Normalizer returns nothing when using setCircularReferenceHandler

Serializer using Normalizer returns nothing when using setCircularReferenceHandler

php symfony doctrine-orm php-7.1 symfony-3.3

symfony

Symfony 3.0 migration PHP 5.5 to PHP 7.1 : "A PHP accelerator should be installed > Install and/or enable a PHP accelerator (highly recommended)"?

php symfony php-7 php-5.5 php-7.1

symfony

Doctrine php7+ type hinting, Declaration of Proxies error

symfony doctrine-orm php-7 php-7.1

symfony