Upgrade to PHP 7.3 PPA

[adamtomat]

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Will Trellis look at supporting PHP 7.3? If so, when is this likely to occur (e.g. soon, a year, when 7.2 is EOL)?

What is the current behavior?

Trellis installs a PHP 7.2 PPA

What is the expected or desired behavior?

Trellis installs a PHP 7.3 PPA

Feature Request

Please provide use cases for changing the current behavior:

There's some useful features in PHP 7.3 that would be useful to the community (JSON error handling I'm looking at you).

Other relevant information:

PHP will need to be upgraded at some point. Wondering what sort of timescale we are looking at?

What needs to happen in order to switch to PHP 7.3 too?

[swalkinshaw]

Generally we just need to make sure that WordPress itself can support a new PHP version.

Found this: https://make.wordpress.org/core/2018/10/15/wordpress-and-php-7-3/

Looks like 5.0 should be compatible, but there's also one or two small issues assigned for 5.0.1