Php malformed utf 8 characters possibly incorrectly encoded

- Php json malformed utf 8 characters possibly incorrectly encoded
- Php json_encode malformed utf 8 characters possibly incorrectly encoded
- Malformed utf 8 characters possibly incorrectly encoded php laravel
- Php 报错 malformed utf 8 characters possibly incorrectly encoded
- Malformed utf-8 characters php
- Error php