Use JSON_INVALID_UTF8_IGNORE option to call json_encode function. (#923)
Use JSON_INVALID_UTF8_IGNORE option to call json_encode function. (#923)

Co-authored-by: zouhui002 <3407258179db540eeb23e0e5a88baee9b6b3873f@ke.com>
DerManoMann/swagger-php,zircote/swagger-php