diff --git a/.github/workflows/tests.yml b/.github/workflows/tests.yml
new file mode 100644
index 00000000..d247a587
--- /dev/null
+++ b/.github/workflows/tests.yml
@@ -0,0 +1,45 @@
+name: Tests
+
+on: [ push, pull_request ]
+
+jobs:
+  lint:
+    name: Lint PHP files
+    runs-on: ubuntu-latest
+    strategy:
+      matrix:
+        php:
+          - '8.2'
+          - '8.3'
+    steps:
+      - name: Checkout
+        uses: actions/checkout@v4
+
+      - name: Setup PHP version
+        uses: shivammathur/setup-php@v2
+        with:
+          php-version: ${{ matrix.php-versions }}
+
+      - name: Lint PHP
+        run: find . -type f -name '*.php' ! -path "./.Build/*" -print0 | xargs -0 -n1 -P4 php -l -n | (! grep -v "No syntax errors detected" )
+
+  code-quality:
+    name: Code quality
+    runs-on: ubuntu-latest
+    env:
+      php: '8.2'
+    steps:
+      - name: Checkout
+        uses: actions/checkout@v4
+
+      - name: Setup PHP version
+        uses: shivammathur/setup-php@v2
+        with:
+          php-version: ${{ matrix.php-versions }}
+
+      - name: Install testing system
+        run: composer update --no-progress --prefer-dist --optimize-autoloader
+
+      - name: Check PHP coding standards
+        run: |
+          make check-php
diff --git a/.php-cs-fixer.dist.php b/.php-cs-fixer.dist.php
new file mode 100644
index 00000000..77dc23d1
--- /dev/null
+++ b/.php-cs-fixer.dist.php
@@ -0,0 +1,76 @@
+<?php
+
+declare(strict_types=1);
+
+use PhpCsFixer\Config;
+use PhpCsFixer\Finder;
+
+return (new Config())
+    ->setFinder(
+        (new Finder())
+            ->in(__DIR__ . '/Documentation')
+    )
+    ->setRiskyAllowed(true)
+    ->setRules([
+        '@DoctrineAnnotation' => true,
+        // @todo: Switch to @PER-CS2.0 once php-cs-fixer's todo list is done: https://github.com/PHP-CS-Fixer/PHP-CS-Fixer/issues/7247
+        '@PER-CS1.0' => true,
+        'array_indentation' => true,
+        'array_syntax' => ['syntax' => 'short'],
+        'cast_spaces' => ['space' => 'none'],
+        // @todo: Can be dropped once we enable @PER-CS2.0
+        'concat_space' => ['spacing' => 'one'],
+        'declare_equal_normalize' => ['space' => 'none'],
+        'declare_parentheses' => true,
+        'dir_constant' => true,
+        // @todo: Can be dropped once we enable @PER-CS2.0
+        'function_declaration' => [
+            'closure_fn_spacing' => 'none',
+        ],
+        'function_to_constant' => ['functions' => ['get_called_class', 'get_class', 'get_class_this', 'php_sapi_name', 'phpversion', 'pi']],
+        'type_declaration_spaces' => true,
+        'global_namespace_import' => ['import_classes' => false, 'import_constants' => false, 'import_functions' => false],
+        'list_syntax' => ['syntax' => 'short'],
+        // @todo: Can be dropped once we enable @PER-CS2.0
+        'method_argument_space' => true,
+        'modernize_strpos' => true,
+        'modernize_types_casting' => true,
+        'native_function_casing' => true,
+        'no_alias_functions' => true,
+        'no_blank_lines_after_phpdoc' => true,
+        'no_empty_phpdoc' => true,
+        'no_empty_statement' => true,
+        'no_extra_blank_lines' => true,
+        'no_leading_namespace_whitespace' => true,
+        'no_null_property_initialization' => true,
+        'no_short_bool_cast' => true,
+        'no_singleline_whitespace_before_semicolons' => true,
+        'no_superfluous_elseif' => true,
+        'no_trailing_comma_in_singleline' => true,
+        'no_unneeded_control_parentheses' => true,
+        'no_unused_imports' => true,
+        'no_useless_nullsafe_operator' => true,
+        'ordered_imports' => ['imports_order' => ['class', 'function', 'const'], 'sort_algorithm' => 'alpha'],
+        'php_unit_construct' => ['assertions' => ['assertEquals', 'assertSame', 'assertNotEquals', 'assertNotSame']],
+        'php_unit_mock_short_will_return' => true,
+        'php_unit_test_case_static_method_calls' => ['call_type' => 'self'],
+        'phpdoc_no_access' => true,
+        'phpdoc_no_empty_return' => true,
+        'phpdoc_no_package' => true,
+        'phpdoc_scalar' => true,
+        'phpdoc_trim' => true,
+        'phpdoc_types' => true,
+        'phpdoc_types_order' => ['null_adjustment' => 'always_last', 'sort_algorithm' => 'none'],
+        'return_type_declaration' => ['space_before' => 'none'],
+        'single_quote' => true,
+        'single_space_around_construct' => true,
+        'single_line_comment_style' => ['comment_types' => ['hash']],
+        // @todo: Can be dropped once we enable @PER-CS2.0
+        'single_line_empty_body' => true,
+        'trailing_comma_in_multiline' => ['elements' => ['arguments', 'arrays', 'match', 'parameters']],
+        'whitespace_after_comma_in_array' => ['ensure_single_space' => true],
+        'yoda_style' => ['equal' => false, 'identical' => false, 'less_and_greater' => false],
+
+        // We need this for documentation!
+        'no_useless_else' => false, // We want to preserve else with comments only
+    ]);
diff --git a/Documentation/Installation/Deployer/_deploy.php b/Documentation/Installation/Deployer/_deploy.php
index 45543797..acc0a05b 100644
--- a/Documentation/Installation/Deployer/_deploy.php
+++ b/Documentation/Installation/Deployer/_deploy.php
@@ -1,7 +1,9 @@
 <?php
+
 namespace Deployer;
 
 require_once(__DIR__ . '/vendor/sourcebroker/deployer-loader/autoload.php');
+
 new \SourceBroker\DeployerExtendedTypo3\Loader();
 
 set('repository', 'git@github.com:youraccount/yourproject.git');
diff --git a/Documentation/Installation/ReleaseIntegrity.rst b/Documentation/Installation/ReleaseIntegrity.rst
index b5cb89b6..f459df69 100644
--- a/Documentation/Installation/ReleaseIntegrity.rst
+++ b/Documentation/Installation/ReleaseIntegrity.rst
@@ -12,7 +12,7 @@ the automated release process. SHA2-256, SHA1 and MD5 hashes are also generated
 for these files.
 
 Release contents
-----------------
+================
 
 Every release of TYPO3 is made available with the following files:
 
@@ -30,7 +30,7 @@ Every release of TYPO3 is made available with the following files:
     package file
 
 Checking file hashes
---------------------
+====================
 
 File hashes are used to check that a downloaded file was transferred and stored
 correctly on the local system. TYPO3 uses cryptographic hash methods including `MD5`_
@@ -92,7 +92,7 @@ These hashes must match the hashes published on get.typo3.org to ensure package
 
 
 Checking file signatures
-------------------------
+========================
 
 TYPO3 uses `Pretty Good Privacy`_ to sign release packages and Git release tags.
 To validate these signatures `The GNU Privacy Guard`_ is recommend, however
@@ -178,7 +178,7 @@ of currently used keys or access the https://get.typo3.org/KEYS file directly).
 
 
 Checking tag signature
-----------------------
+======================
 
 Checking signatures on Git tags works similar to verifying the results using the
 :bash:`gpg` tool, but with using the :bash:`git tag --verify` command directly.
@@ -224,8 +224,8 @@ The :bash:`git show` command on the name of the tag reveals more details.
 
 
 
-Public Keys
------------
+Public keys
+===========
 
 ..  note::
     Starting in June 2017, TYPO3 releases have been cryptographically signed by the
diff --git a/Documentation/Installation/Surf/_MyDeployment.php b/Documentation/Installation/Surf/_MyDeployment.php
index 4f906718..cfb2468f 100644
--- a/Documentation/Installation/Surf/_MyDeployment.php
+++ b/Documentation/Installation/Surf/_MyDeployment.php
@@ -1,6 +1,6 @@
 <?php
-/** @var \TYPO3\Surf\Domain\Model\Deployment $deployment */
 
+/** @var \TYPO3\Surf\Domain\Model\Deployment $deployment */
 $node = new \TYPO3\Surf\Domain\Model\Node('my.node.com');
 $node
     ->setHostname($node->getName())
@@ -20,7 +20,7 @@
         '.ddev',
         '.git',
         $application->getOption('webDirectory') . '/fileadmin',
-        'packages/**.sass'
+        'packages/**.sass',
     ])
     ->setOption(TYPO3\Surf\Task\TYPO3\CMS\FlushCachesTask::class . '[arguments]', [])
     ->addSymlink($application->getOption('webDirectory') . '/config/system/settings.php', '../../../../shared/Configuration/settings.php')
@@ -35,26 +35,27 @@ function () use ($deployment, $application) {
                 ->beforeTask(
                     \TYPO3\Surf\Task\TYPO3\CMS\SetUpExtensionsTask::class,
                     \TYPO3\Surf\Task\TYPO3\CMS\CompareDatabaseTask::class,
-                    $application
+                    $application,
                 )
                 ->beforeStage(
                     'transfer',
                     \TYPO3\Surf\Task\Php\WebOpcacheResetCreateScriptTask::class,
-                    $application
+                    $application,
                 )
-                ->afterStage('switch',
+                ->afterStage(
+                    'switch',
                     \TYPO3\Surf\Task\Php\WebOpcacheResetExecuteTask::class,
-                    $application
+                    $application,
                 )
                 // CreatePackageStatesTask is done by post-autoload-dump script and can be removed
                 // https://github.com/TYPO3/TYPO3.CMS.BaseDistribution/blob/9.x/composer.json#L38
                 ->removeTask(
                     \TYPO3\Surf\Task\TYPO3\CMS\CreatePackageStatesTask::class,
-                    $application
+                    $application,
                 )
                 ->removeTask(
                     \TYPO3\Surf\Task\TYPO3\CMS\CopyConfigurationTask::class,
-                    $application
+                    $application,
                 );
-        }
+        },
     );
diff --git a/Makefile b/Makefile
index 97039388..769332df 100644
--- a/Makefile
+++ b/Makefile
@@ -3,8 +3,22 @@ help: ## Displays this list of targets with descriptions
 	@echo "The following commands are available:\n"
 	@grep -E '^[a-zA-Z0-9_-]+:.*?## .*$$' $(MAKEFILE_LIST) | sort | awk 'BEGIN {FS = ":.*?## "}; {printf "\033[32m%-30s\033[0m %s\n", $$1, $$2}'
 
+.PHONY: check
+check: check-php
+
+.PHONY: check-php
+check-php:
+	vendor/bin/php-cs-fixer check
+
 .PHONY: docs
 docs: ## Generate projects docs (from "Documentation" directory)
 	mkdir -p Documentation-GENERATED-temp
 
 	docker run --rm --pull always -v "$(shell pwd)":/project -t ghcr.io/typo3-documentation/render-guides:latest --config=Documentation
+
+.PHONY: fix
+fix: fix-php
+
+.PHONY: fix-php
+fix-php:
+	vendor/bin/php-cs-fixer fix
diff --git a/composer.json b/composer.json
index b4f573bd..f498a76c 100644
--- a/composer.json
+++ b/composer.json
@@ -6,6 +6,9 @@
     "require": {
       "typo3/cms-core": "dev-main"
     },
+    "require-dev": {
+        "friendsofphp/php-cs-fixer": "^3.51"
+    },
     "config": {
         "allow-plugins": {
             "typo3/cms-composer-installers": true,