How do I install the ext-curl extension with PHP 7?

I've installed PHP 7 using [this repo][1], but when I try to run ``composer install``, it's giving this error: > - [package] requires ext-curl * -> the requested PHP extension curl is missing from your system. With PHP 5, you can easily install it by running the ``yum`` or ``apt-get install php5-curl`` command, but I can't find how to install the PHP 7 equivalent. How do I install ext-curl for PHP 7? [1]: https://web.archive.org/web/20151119010500/http://php7.zend.com/repo.php "archived from: http://php7.zend.com/repo.php"