Debian 9 allows installing PHP 7.0 using apt, as I explained in this link (in Spanish).
In this post, I will go to explain how to install PHP 7.3, whose publication date (GA: General Availability) is December 6, 2018.
Category: free software
Install PHP 7.2 on Debian 9
Debian 9 allows installing PHP 7.0 using apt, as I explained in this link (in Spanish).
The next version of Laravel, the 5.6, has as a requirement to have a PHP version equal to or higher than 7.1.3, so I will explain how to install the latest stable version, 7.2.