1. Identify the hook interface/method
2. Find the corresponding PSR-14 event (see mapping below)
3. Create new event listener class with #[AsEventListener]
4. Move logic from hook method to __invoke()
5. Remove hook registration from ext_localconf.php
6. Add Services.yaml entry (for v12/v13 fallback)
7. Run php -l on new file

1. Replace 'eval' => 'required' → 'required' => true
2. Replace 'eval' => 'trim' → remove (default behavior)
3. Replace 'eval' => 'null' → 'nullable' => true
4. Replace 'eval' => 'int' → 'type' => 'number'
5. Replace 'renderType' => 'inputDateTime' → 'type' => 'datetime'
6. Replace 'renderType' => 'inputLink' → 'type' => 'link'
7. Replace 'renderType' => 'colorPicker' → 'type' => 'color'
8. Replace 'type' => 'input', 'eval' => 'email' → 'type' => 'email'
9. Convert items arrays: [0] => label, [1] => value → ['label' => ..., 'value' => ...]
10. Remove boilerplate columns auto-created from ctrl (v13.3+): hidden, starttime, endtime, fe_group, language fields
11. Use palettes for enablecolumns: visibility → hidden, access → starttime, endtime
12. Remove convention fields from ext_tables.sql (auto-added to database)
13. Run php -l to verify syntax

1. Identify all makeInstance calls in the class
2. For each: add constructor parameter with type
3. Replace makeInstance calls with $this->propertyName
4. Add/update Services.yaml if needed
5. Use readonly promoted properties
6. Verify with php -l

1. Replace hardcoded strings with <f:translate> keys
2. Add missing XLIFF entries to locallang.xlf
3. Replace <a href="..."> with <f:link.page> or <f:link.typolink>
4. Replace <img> with <f:image>
5. Extract repeated blocks to Partials
6. Add accessibility attributes (alt, aria-label, role)

PHP files:
  1. Replace namespace declarations
  2. Replace use statements
  3. Replace class references in strings (DI, TCA)
  
Fluid files:
  1. Replace {namespace} declarations
  2. Replace ViewHelper references
  
Configuration files:
  1. Update composer.json autoload
  2. Update ext_emconf.php
  3. Update Services.yaml service names
  4. Update TCA table prefixes
  5. Update TypoScript paths (EXT:old → EXT:new)
  
Database:
  1. Generate SQL rename migration
  2. Update ext_tables.sql

Page TSconfig:
  1. Extract addPageTSConfig() calls
  2. Create Configuration/page.tsconfig
  3. Remove from ext_localconf.php

User TSconfig:
  1. Extract addUserTSConfig() calls  
  2. Create Configuration/user.tsconfig
  3. Remove from ext_localconf.php

Icons:
  1. Extract icon registry calls
  2. Move to Configuration/Icons.php (v14)
  3. Remove from ext_localconf.php

Backend modules:
  1. Extract registerModule() calls
  2. Move to Configuration/Backend/Modules.php
  3. Remove from ext_tables.php

Unit tests:
  1. Create Tests/Unit/ structure
  2. Generate test class per service/utility class
  3. Add phpunit.xml.dist configuration
  
Functional tests:
  1. Create Tests/Functional/ structure
  2. Add fixture files
  3. Generate test for repository/DataHandler usage

CI pipeline:
  1. Create .github/workflows/ci.yml
  2. Configure PHP matrix (8.2, 8.3, 8.4)
  3. Configure TYPO3 matrix (v13, v14)

1. Add property hooks where getter/setter pattern exists
2. Use asymmetric visibility (public private(set)) on DTOs
3. Replace array_search + if with array_find()
4. Replace array_filter + reset with array_find()
5. Replace manual array_key_exists checks with array_any/array_all
6. Add #[\Deprecated] attribute to legacy methods
7. Run php -l to verify syntax

1. Create ContentBlocks/ContentElements/<name>/config.yaml
2. Map TCA columns to YAML fields
3. Move Fluid template to ContentBlocks/ContentElements/<name>/Source/
4. Create EditorInterface.yaml
5. Remove old TCA override file
6. Remove SQL from ext_tables.sql (columns become automatic)
7. Test rendering in frontend

1. Extract strings from templates/PHP
2. Generate XLIFF keys following convention
3. Add entries to Resources/Private/Language/locallang.xlf
4. Replace hardcoded strings with LLL: references
5. Create de.locallang.xlf with German translations (if applicable)

undefined

undefined