File Content: README.md Symfony Polyfill / Php73 ======================== This component provides functions added to PHP 7.3 core: - [`array_key_first`](https://php.net/array_key_first) - [`array_key_last`](https://php.net/array_key_last) - [`hrtime`](https://php.net/function.hrtime) - [`is_countable`](https://php.net/is_countable) - [`JsonException`](https://php.net/JsonException) More information can be found in the [main Polyfill README](https://github.com/symfony/polyfill/blob/main/README.md). License ======= This library is released under the [MIT license](LICENSE). Submit