Write cutting edge code and release it to legacy platforms

[szepeviktor]

Problem

We want to write PHP 7.4/8.0 code but users run PHP 5.6

Solution

Use Rector in the release process!

Alternatives you've considered

Sleep.

[jakubmikita]

Hmm, do you know any WP plugin which is using this?

It looks interesting!

[szepeviktor]

I'm not in the WordPress business, just playing with PHP technologies.
Do you think it will somehow fail?

[szepeviktor]

https://github.com/rectorphp/rector/issues?q=WordPress 🖱️

<?php

use Rector\Core\Configuration\Option;
use Rector\Set\ValueObject\SetList;
use Symfony\Component\DependencyInjection\Loader\Configurator\ContainerConfigurator;

return static function (ContainerConfigurator $containerConfigurator): void {
    $parameters = $containerConfigurator->parameters();
    $parameters->set(Option::SETS, [
        SetList::DOWNGRADE_PHP74,
        SetList::DOWNGRADE_PHP73,
        SetList::DOWNGRADE_PHP72,
        SetList::DOWNGRADE_PHP71,
        SetList::DOWNGRADE_PHP70,
        SetList::DOWNGRADE_PHP56,
    ]);
};

[jakubmikita]

WordPress is very specific and bloated, looking at all the problems with ie with PHPUnit I wouldn't be surprised if it fail miserably. I will take a closer look at this package and its usage with WP though

[szepeviktor]

You can audit the changes.
Tests must be written for PHPUnit running on PHP 5.6. -> https://github.com/rectorphp/rector/blob/master/packages/set/src/ValueObject/SetList.php#L399-L467

[szepeviktor]

Hmm, do you know any WP plugin which is using this?

Found one: https://github.com/leoloso/PoP/blob/master/rector-downgrade-code.php

[szepeviktor]

Another one: https://github.com/szepeviktor/phpstan-higher-order-collections/blob/master/rector.php

[mircobabini]

Hmm, do you know any WP plugin which is using this?

Found one: https://github.com/leoloso/PoP/blob/master/rector-downgrade-code.php
Another one: https://github.com/szepeviktor/phpstan-higher-order-collections/blob/master/rector.php

These are not Wordpress plugins.

Also, seems like support of autoload and includes (WordPress beloved stuffs) is still a work in progress rectorphp/rector#4330.

[szepeviktor]

I think using Composer autoloader (not the tool!) in a WordPress plugin is okay. Please see Yoast SEO for example.
So Rector won't have to rectify that. Composer autoloader is PHP 5.3+ compatible.

[szepeviktor]

This is how I try to break away from WordPress legacy technologies.
Theory https://github.com/szepeviktor/small-project/blob/master/MAIN-FILE-PARTS.md
In practice meilisearch/meilisearch-wordpress#20

[jakubmikita]

We're good with Composer itself because all its loaders are backward compatible. There are problems with a few things:

• packages are not backward compatible with whatever PHP version we are using (e.g. plugin supports PHP 5.6 but the package we are requiring needs 7.1) - this is where Rector can help
• other plugins are loading the same packages but in different versions - this is where PHP Scoper or Imposter we are using can help by prefixing the namespaces

I'm looking into using the Rector within this project and I'd like to find out if all the packages processed by Imposter can be rectified to older PHP versions.

[szepeviktor]

Highly interesting topic 👀

Time traveling 101!

[szepeviktor]

Public testing with Rectorizer 🤖
https://github.com/szepeviktor/rectorize/actions/runs/588606017

[jakubmikita]

Wow, this truly seems to work!