Better PHP - Keep your code up to date

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Better PHP Keep your code up to date

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Who Am I? • Werner „wmk“ Krauß • Freelancer • netwerkstatt, Bad Ischl, AT • PHP since 1998 (PHP3) • Silverstripe CMS since 2009 (SS 2.3)

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The „Problem“ • New PHP version every year • Language evolves, becomes even more mature • Cool and useful features are added • We‘re still stuck with older PHP versions • Modules should also run with older installations • No knowledge of new features

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What‘s New In PHP since 5.6

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Let‘s Dive Into It Look at a practical example

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What Type To You Prefer? • Return types (7.0) • Typed parameters • Object types, nullable types (7.1) • Typed properties (7.4) • … • Union types • Intersection types

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Sugar For The Baby: New, Smooth Operators • Null coalesce ?? (7.0) • Null coalesce asignment operator ??= (7.4)

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Sort Of Star Trek • Spaceship operator <=> (7.0) • Can even sort more params at once

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New, Safe Operators • Nullsafe operator ?-> (8.0)

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New Strings (Not Only For My Guitar) • str_contains() • str_starts_with() • str_ends_with() • More efficient and easier to use than strpos()

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Romantic PHP

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It‘s A Match! • Match • Replaces switch or if-else chains • Typesafe • Kind of lookup table

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Arrow Functions • More functional coding style • Somewhat similar to JavaScript

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Built In Interfaces • Stringable • Iterable

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Named Arguments • Pass input to a method by name instead of argument‘s order • More flexible code • Better readability

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Constructor Property Promotion

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Attributes • Structured, machine readable metadata on declarations • Can be inspected by ReflectionAPI

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Faul Fauler EDV-ler The tale of the lazy IT expert

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New Tools On The Block • Automation FTW • Silverstripe-ideannotator • PHPCS • PHPUnit • PHPStan • RectorPHP

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Rector: Your Friend For Updating Code • Much better than search/replace • Uses Abstract Syntax Tree • Lots of rules (rectors) for • upgrading language • code quality • upgrading PHPUnit … • Possible to define own rectors for special tasks

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Rector: Installation • Via composer as dev dependency • Big, monolithic bundle • Totally dependency free

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Create rector.php • vendor/bin/rector init • Configure it for your needs • Your code folders • Rules to be applied • Easier config: SetLists or LevelSetLists

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Rector And Silverstripe CMS

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Rector And Silverstripe CMS • silverstripe-rector • Rectors and configurations for handling Silverstripe upgrades • Work in progress

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silverstripe-rector: So Far • Add table-name to DataObjects if missing • Use Foo::create() instead of new Foo()

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silverstripe-rector: Satisfy PHPStan • Change ->owner to ->getOwner() • Add @config to configuration properties

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Let‘s Go! 2^8+2km

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silverstripe-rector: A Possible Future • Silverstripe deprecations • Module deprecations • Updated Silverstripe code style • E.g. use arrays for sorting or filtering DataLists • Help needed to keep the rules up to date

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Rules And More

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Add Rule To silverstripe-rector • Have an idea 💡 • Write a test ✅ • Configure rule 😊 • Add to Set 👍 • Party 🥳

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The Future Is Here

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The Future Is Automated

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Links, Sources, etc… • Links: • Rector: https://getrector.com/ • silverstripe-rector: https://github.com/wernerkrauss/silverstripe-rector/ • Screenshots / Code Examples: • Rector Documentation • PHP Documentation • Images: • Werner Krauß, Caminho Portoguese 2023