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  1. Symfony Polyfill / Php73
  2. ========================
  3. This component provides functions added to PHP 7.3 core:
  4. - [`array_key_first`](https://php.net/array_key_first)
  5. - [`array_key_last`](https://php.net/array_key_last)
  6. - [`hrtime`](https://php.net/function.hrtime)
  7. - [`is_countable`](https://php.net/is_countable)
  8. - [`JsonException`](https://php.net/JsonException)
  9. More information can be found in the
  10. [main Polyfill README](https://github.com/symfony/polyfill/blob/master/README.md).
  11. License
  12. =======
  13. This library is released under the [MIT license](LICENSE).