Edit file File name : ModuleName.php Content :<?php namespace Api\V8\Param\Options; use Symfony\Component\OptionsResolver\OptionsResolver; use Symfony\Component\Validator\Constraints as Assert; class ModuleName extends BaseOption { const REGEX_MODULE_NAME_PATTERN = '/^(\d|\W)|\W/'; /** * @inheritdoc */ public function add(OptionsResolver $resolver) { $resolver ->setRequired('moduleName') ->setAllowedTypes('moduleName', 'string') ->setAllowedValues('moduleName', $this->validatorFactory->createClosure([ new Assert\NotBlank(), new Assert\Regex([ 'pattern' => self::REGEX_MODULE_NAME_PATTERN, 'match' => false, ]), ])); } } Save