DevHeads.net

- Added PHPerKaigi 2019

You can view the Pull Request on github:
<a href="https://github.com/php/web-php/pull/272" title="https://github.com/php/web-php/pull/272">https://github.com/php/web-php/pull/272</a>

Opened By: rela1470
Pull Request Description:
Hi there,
Please add my Conference.
<a href="https://phperkaigi.jp/2019/" title="https://phperkaigi.jp/2019/">https://phperkaigi.jp/2019/</a>