typo3-core-contributions-php84

name	typo3-core-contributions-php84
description	PHP 8.4 patterns for TYPO3 Core contributions. Using new language features in Core patches.
version	1.0.0
php_compatibility	8.4+
typo3_compatibility	13.0 - 14.x
related_skills	["typo3-core-contributions","php-modernization"]
triggers	["core php 8.4","contribute php84"]

TYPO3 Core Contributions with PHP 8.4

Compatibility: PHP 8.4+, TYPO3 v13.x and v14.x

Related Skills:

• typo3-core-contributions - Main contributions guide
• php-modernization/SKILL-PHP84 - PHP 8.4 features

---

1. Core PHP 8.4 Adoption

TYPO3 v14 PHP Requirements

TYPO3 v14 requires PHP 8.3+ and fully supports PHP 8.4 features.

When to Use PHP 8.4 Features in Core

Feature	Core Usage
Property hooks	For value objects and DTOs
Asymmetric visibility	For immutable services
New array functions	For collection operations
#[\Deprecated]	For deprecating Core methods

---

2. Example Core Patch Patterns

Using Property Hooks

<?php

declare(strict_types=1);

namespace TYPO3\CMS\Core\Configuration;

final class SiteConfiguration
{
    public string $identifier {
        set (string $value) {
            if (!preg_match('/^[a-z][a-z0-9_-]*$/', $value)) {
                throw new \InvalidArgumentException(
                    'Site identifier must be lowercase alphanumeric',
                    1234567890
                );
            }
            $this->identifier = $value;
        }
    }
}

Using #[\Deprecated]

<?php

declare(strict_types=1);

namespace TYPO3\CMS\Core\Utility;

final class GeneralUtility
{
    #[\Deprecated(
        message: 'Use native array_find() instead',
        since: 'TYPO3 14.0'
    )]
    public static function arrayFind(array $array, callable $callback): mixed
    {
        trigger_error(
            'GeneralUtility::arrayFind() is deprecated. Use array_find().',
            E_USER_DEPRECATED
        );
        return array_find($array, $callback);
    }
}

---

3. Commit Message for PHP 8.4 Changes

[TASK] Use PHP 8.4 array_find() in ContentRepository

Replace manual loop with native array_find() function
introduced in PHP 8.4.

Resolves: #12345
Releases: main

---

4. Testing PHP 8.4 Changes

# Run Core tests with PHP 8.4
Build/Scripts/runTests.sh -p 8.4 -s functional

# Check for deprecations
Build/Scripts/runTests.sh -s checkDeprecations

---

References

• typo3-core-contributions SKILL.md
• php-modernization SKILL-PHP84
• TYPO3 Contribution Guide

---

Credits & Attribution

This skill is part of the webconsulting.at TYPO3 skills collection.