hehe.org/vendor/symfony/polyfill-php73/README.md

Symfony Polyfill / Php73

This component provides functions added to PHP 7.3 core:

• array_key_first
• array_key_last
• hrtime
• is_countable
• JsonException

More information can be found in the main Polyfill README.

License

This library is released under the MIT license.