diff --git a/.github/workflows/dev.yml b/.github/workflows/deploy-backend-dev.yml
similarity index 52%
rename from .github/workflows/dev.yml
rename to .github/workflows/deploy-backend-dev.yml
index 86e88da..31008fb 100644
--- a/.github/workflows/dev.yml
+++ b/.github/workflows/deploy-backend-dev.yml
@@ -1,9 +1,15 @@
-name: SSH Upload and Composer Install on DEV
+name: Upload backend to dev server and lint
 
 on:
   push:
     branches:
       - dev
+  pull_request:
+    branches:
+      - dev
+
+env:
+  FLUTTER_VERSION: 3.10.1
 
 jobs:
   deploy:
@@ -21,7 +27,13 @@ jobs:
       - name: Upload PHP code
         run: scp -o StrictHostKeyChecking=no -r * ${{ secrets.SERVER_USERNAME }}@${{ secrets.SERVER_HOST }}:/home/julesartd/www/api-dev-edt-3il
 
-      - name: SSH into server and run composer install
+
+  install_dependencies:
+    needs: deploy
+    runs-on: ubuntu-latest
+
+    steps:
+      - name: SSH Into Server and Install Composer Dependencies
         uses: appleboy/ssh-action@master
         with:
           host: ${{ secrets.SERVER_HOST }}
@@ -29,4 +41,17 @@ jobs:
           key: ${{ secrets.SSH_PRIVATE_KEY }}
           script: |
             cd /home/julesartd/www/api-dev-edt-3il/backend
-            composer2 install
\ No newline at end of file
+            composer2 install
+      
+      - name: SSH Into Server and execute Linter for PHP
+        uses: appleboy/ssh-action@master
+        with:
+          host: ${{ secrets.SERVER_HOST }}
+          username: ${{ secrets.SERVER_USERNAME }}
+          key: ${{ secrets.SSH_PRIVATE_KEY }}
+          script: |
+            cd /home/julesartd/www/api-dev-edt-3il/backend
+            vendor/bin/php-cs-fixer fix src
+      
+
+          
\ No newline at end of file
diff --git a/.github/workflows/execute-linter-front.yml b/.github/workflows/execute-linter-front.yml
new file mode 100644
index 0000000..a0bd504
--- /dev/null
+++ b/.github/workflows/execute-linter-front.yml
@@ -0,0 +1,39 @@
+name: Execute Lint and Format
+
+concurrency:
+  group: $-$
+  cancel-in-progress: true
+
+on:
+  push:
+    branches:
+      - main
+      - dev
+  pull_request:
+    branches:
+      - main
+      - dev
+
+env:
+  FLUTTER_VERSION: 3.19.2
+
+jobs:
+  format-lint:
+    if: github.event.pull_request.draft == false
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v3
+
+      - name: Setup Flutter
+        uses: subosito/flutter-action@v2
+        with:
+          cache: true
+          cache-key: ":os:-modules-:hash:"
+          channel: "stable"
+          flutter-version: ${{ env.FLUTTER_VERSION }}
+
+      - name: Formatting
+        run: dart --disable-analytics format --set-exit-if-changed frontend/app_student/lib
+
+      - name: Lint
+        run: flutter analyze lib
\ No newline at end of file
diff --git a/backend/.gitignore b/backend/.gitignore
index a67f91e..3260930 100644
--- a/backend/.gitignore
+++ b/backend/.gitignore
@@ -8,3 +8,8 @@
 /var/
 /vendor/
 ###< symfony/framework-bundle ###
+
+###> friendsofphp/php-cs-fixer ###
+/.php-cs-fixer.php
+/.php-cs-fixer.cache
+###< friendsofphp/php-cs-fixer ###
diff --git a/backend/.php-cs-fixer.dist.php b/backend/.php-cs-fixer.dist.php
new file mode 100644
index 0000000..3788194
--- /dev/null
+++ b/backend/.php-cs-fixer.dist.php
@@ -0,0 +1,13 @@
+<?php
+
+$finder = (new PhpCsFixer\Finder())
+    ->in(__DIR__)
+    ->exclude('var')
+;
+
+return (new PhpCsFixer\Config())
+    ->setRules([
+        '@Symfony' => true,
+    ])
+    ->setFinder($finder)
+;
diff --git a/backend/README.md b/backend/README.md
index dcb680b..76eadbb 100644
--- a/backend/README.md
+++ b/backend/README.md
@@ -18,7 +18,6 @@ Pour installer l'API et ses dépendances, suivez les étapes ci-dessous :
 3. Exécutez la commande `composer install` pour installer toutes les dépendances nécessaires.
 
 
-
 ## Endpoints
 
 L'API offre les endpoints suivants :
@@ -26,6 +25,8 @@ L'API offre les endpoints suivants :
 - `/api/timetable?class_param=XX` : Permet de récupérer l'emploi du temps d'une classe spécifique.
 - `/api/classes` : Permet de récupérer la liste des classes disponibles.
 
+Vous pouvez retrouver la spécification OpenApi à la racine du projet Symfony
+
 ## Utilisation
 
 Une fois l'API installée et configurée, vous pouvez commencer à l'utiliser en effectuant des requêtes HTTP vers les endpoints mentionnés ci-dessus. Assurez-vous de respecter les méthodes HTTP appropriées (GET, POST, etc.) pour interagir avec les données de l'API.
diff --git a/backend/composer.json b/backend/composer.json
index 0ca2eaa..123344a 100644
--- a/backend/composer.json
+++ b/backend/composer.json
@@ -27,6 +27,7 @@
         "symfony/yaml": "6.4.*"
     },
     "require-dev": {
+        "friendsofphp/php-cs-fixer": "^3.51",
         "symfony/debug-bundle": "6.4.*",
         "symfony/maker-bundle": "^1.56"
     },
diff --git a/backend/composer.lock b/backend/composer.lock
index 11f17db..7a1038f 100644
--- a/backend/composer.lock
+++ b/backend/composer.lock
@@ -4,7 +4,7 @@
         "Read more about it at https://getcomposer.org/doc/01-basic-usage.md#installing-dependencies",
         "This file is @generated automatically"
     ],
-    "content-hash": "251b242f1c244121fc81b576193a6cb6",
+    "content-hash": "09041e7e38ac2ca548118cffc4e2bf78",
     "packages": [
         {
             "name": "doctrine/cache",
@@ -4520,6 +4520,316 @@
         }
     ],
     "packages-dev": [
+        {
+            "name": "composer/pcre",
+            "version": "3.1.2",
+            "source": {
+                "type": "git",
+                "url": "https://github.com/composer/pcre.git",
+                "reference": "4775f35b2d70865807c89d32c8e7385b86eb0ace"
+            },
+            "dist": {
+                "type": "zip",
+                "url": "https://api.github.com/repos/composer/pcre/zipball/4775f35b2d70865807c89d32c8e7385b86eb0ace",
+                "reference": "4775f35b2d70865807c89d32c8e7385b86eb0ace",
+                "shasum": ""
+            },
+            "require": {
+                "php": "^7.4 || ^8.0"
+            },
+            "require-dev": {
+                "phpstan/phpstan": "^1.3",
+                "phpstan/phpstan-strict-rules": "^1.1",
+                "symfony/phpunit-bridge": "^5"
+            },
+            "type": "library",
+            "extra": {
+                "branch-alias": {
+                    "dev-main": "3.x-dev"
+                }
+            },
+            "autoload": {
+                "psr-4": {
+                    "Composer\\Pcre\\": "src"
+                }
+            },
+            "notification-url": "https://packagist.org/downloads/",
+            "license": [
+                "MIT"
+            ],
+            "authors": [
+                {
+                    "name": "Jordi Boggiano",
+                    "email": "j.boggiano@seld.be",
+                    "homepage": "http://seld.be"
+                }
+            ],
+            "description": "PCRE wrapping library that offers type-safe preg_* replacements.",
+            "keywords": [
+                "PCRE",
+                "preg",
+                "regex",
+                "regular expression"
+            ],
+            "support": {
+                "issues": "https://github.com/composer/pcre/issues",
+                "source": "https://github.com/composer/pcre/tree/3.1.2"
+            },
+            "funding": [
+                {
+                    "url": "https://packagist.com",
+                    "type": "custom"
+                },
+                {
+                    "url": "https://github.com/composer",
+                    "type": "github"
+                },
+                {
+                    "url": "https://tidelift.com/funding/github/packagist/composer/composer",
+                    "type": "tidelift"
+                }
+            ],
+            "time": "2024-03-07T15:38:35+00:00"
+        },
+        {
+            "name": "composer/semver",
+            "version": "3.4.0",
+            "source": {
+                "type": "git",
+                "url": "https://github.com/composer/semver.git",
+                "reference": "35e8d0af4486141bc745f23a29cc2091eb624a32"
+            },
+            "dist": {
+                "type": "zip",
+                "url": "https://api.github.com/repos/composer/semver/zipball/35e8d0af4486141bc745f23a29cc2091eb624a32",
+                "reference": "35e8d0af4486141bc745f23a29cc2091eb624a32",
+                "shasum": ""
+            },
+            "require": {
+                "php": "^5.3.2 || ^7.0 || ^8.0"
+            },
+            "require-dev": {
+                "phpstan/phpstan": "^1.4",
+                "symfony/phpunit-bridge": "^4.2 || ^5"
+            },
+            "type": "library",
+            "extra": {
+                "branch-alias": {
+                    "dev-main": "3.x-dev"
+                }
+            },
+            "autoload": {
+                "psr-4": {
+                    "Composer\\Semver\\": "src"
+                }
+            },
+            "notification-url": "https://packagist.org/downloads/",
+            "license": [
+                "MIT"
+            ],
+            "authors": [
+                {
+                    "name": "Nils Adermann",
+                    "email": "naderman@naderman.de",
+                    "homepage": "http://www.naderman.de"
+                },
+                {
+                    "name": "Jordi Boggiano",
+                    "email": "j.boggiano@seld.be",
+                    "homepage": "http://seld.be"
+                },
+                {
+                    "name": "Rob Bast",
+                    "email": "rob.bast@gmail.com",
+                    "homepage": "http://robbast.nl"
+                }
+            ],
+            "description": "Semver library that offers utilities, version constraint parsing and validation.",
+            "keywords": [
+                "semantic",
+                "semver",
+                "validation",
+                "versioning"
+            ],
+            "support": {
+                "irc": "ircs://irc.libera.chat:6697/composer",
+                "issues": "https://github.com/composer/semver/issues",
+                "source": "https://github.com/composer/semver/tree/3.4.0"
+            },
+            "funding": [
+                {
+                    "url": "https://packagist.com",
+                    "type": "custom"
+                },
+                {
+                    "url": "https://github.com/composer",
+                    "type": "github"
+                },
+                {
+                    "url": "https://tidelift.com/funding/github/packagist/composer/composer",
+                    "type": "tidelift"
+                }
+            ],
+            "time": "2023-08-31T09:50:34+00:00"
+        },
+        {
+            "name": "composer/xdebug-handler",
+            "version": "3.0.3",
+            "source": {
+                "type": "git",
+                "url": "https://github.com/composer/xdebug-handler.git",
+                "reference": "ced299686f41dce890debac69273b47ffe98a40c"
+            },
+            "dist": {
+                "type": "zip",
+                "url": "https://api.github.com/repos/composer/xdebug-handler/zipball/ced299686f41dce890debac69273b47ffe98a40c",
+                "reference": "ced299686f41dce890debac69273b47ffe98a40c",
+                "shasum": ""
+            },
+            "require": {
+                "composer/pcre": "^1 || ^2 || ^3",
+                "php": "^7.2.5 || ^8.0",
+                "psr/log": "^1 || ^2 || ^3"
+            },
+            "require-dev": {
+                "phpstan/phpstan": "^1.0",
+                "phpstan/phpstan-strict-rules": "^1.1",
+                "symfony/phpunit-bridge": "^6.0"
+            },
+            "type": "library",
+            "autoload": {
+                "psr-4": {
+                    "Composer\\XdebugHandler\\": "src"
+                }
+            },
+            "notification-url": "https://packagist.org/downloads/",
+            "license": [
+                "MIT"
+            ],
+            "authors": [
+                {
+                    "name": "John Stevenson",
+                    "email": "john-stevenson@blueyonder.co.uk"
+                }
+            ],
+            "description": "Restarts a process without Xdebug.",
+            "keywords": [
+                "Xdebug",
+                "performance"
+            ],
+            "support": {
+                "irc": "irc://irc.freenode.org/composer",
+                "issues": "https://github.com/composer/xdebug-handler/issues",
+                "source": "https://github.com/composer/xdebug-handler/tree/3.0.3"
+            },
+            "funding": [
+                {
+                    "url": "https://packagist.com",
+                    "type": "custom"
+                },
+                {
+                    "url": "https://github.com/composer",
+                    "type": "github"
+                },
+                {
+                    "url": "https://tidelift.com/funding/github/packagist/composer/composer",
+                    "type": "tidelift"
+                }
+            ],
+            "time": "2022-02-25T21:32:43+00:00"
+        },
+        {
+            "name": "friendsofphp/php-cs-fixer",
+            "version": "v3.51.0",
+            "source": {
+                "type": "git",
+                "url": "https://github.com/PHP-CS-Fixer/PHP-CS-Fixer.git",
+                "reference": "127fa74f010da99053e3f5b62672615b72dd6efd"
+            },
+            "dist": {
+                "type": "zip",
+                "url": "https://api.github.com/repos/PHP-CS-Fixer/PHP-CS-Fixer/zipball/127fa74f010da99053e3f5b62672615b72dd6efd",
+                "reference": "127fa74f010da99053e3f5b62672615b72dd6efd",
+                "shasum": ""
+            },
+            "require": {
+                "composer/semver": "^3.4",
+                "composer/xdebug-handler": "^3.0.3",
+                "ext-filter": "*",
+                "ext-json": "*",
+                "ext-tokenizer": "*",
+                "php": "^7.4 || ^8.0",
+                "sebastian/diff": "^4.0 || ^5.0 || ^6.0",
+                "symfony/console": "^5.4 || ^6.0 || ^7.0",
+                "symfony/event-dispatcher": "^5.4 || ^6.0 || ^7.0",
+                "symfony/filesystem": "^5.4 || ^6.0 || ^7.0",
+                "symfony/finder": "^5.4 || ^6.0 || ^7.0",
+                "symfony/options-resolver": "^5.4 || ^6.0 || ^7.0",
+                "symfony/polyfill-mbstring": "^1.28",
+                "symfony/polyfill-php80": "^1.28",
+                "symfony/polyfill-php81": "^1.28",
+                "symfony/process": "^5.4 || ^6.0 || ^7.0",
+                "symfony/stopwatch": "^5.4 || ^6.0 || ^7.0"
+            },
+            "require-dev": {
+                "facile-it/paraunit": "^1.3 || ^2.0",
+                "justinrainbow/json-schema": "^5.2",
+                "keradus/cli-executor": "^2.1",
+                "mikey179/vfsstream": "^1.6.11",
+                "php-coveralls/php-coveralls": "^2.7",
+                "php-cs-fixer/accessible-object": "^1.1",
+                "php-cs-fixer/phpunit-constraint-isidenticalstring": "^1.4",
+                "php-cs-fixer/phpunit-constraint-xmlmatchesxsd": "^1.4",
+                "phpunit/phpunit": "^9.6 || ^10.5.5 || ^11.0.2",
+                "symfony/var-dumper": "^5.4 || ^6.0 || ^7.0",
+                "symfony/yaml": "^5.4 || ^6.0 || ^7.0"
+            },
+            "suggest": {
+                "ext-dom": "For handling output formats in XML",
+                "ext-mbstring": "For handling non-UTF8 characters."
+            },
+            "bin": [
+                "php-cs-fixer"
+            ],
+            "type": "application",
+            "autoload": {
+                "psr-4": {
+                    "PhpCsFixer\\": "src/"
+                }
+            },
+            "notification-url": "https://packagist.org/downloads/",
+            "license": [
+                "MIT"
+            ],
+            "authors": [
+                {
+                    "name": "Fabien Potencier",
+                    "email": "fabien@symfony.com"
+                },
+                {
+                    "name": "Dariusz Rumiński",
+                    "email": "dariusz.ruminski@gmail.com"
+                }
+            ],
+            "description": "A tool to automatically fix PHP code style",
+            "keywords": [
+                "Static code analysis",
+                "fixer",
+                "standards",
+                "static analysis"
+            ],
+            "support": {
+                "issues": "https://github.com/PHP-CS-Fixer/PHP-CS-Fixer/issues",
+                "source": "https://github.com/PHP-CS-Fixer/PHP-CS-Fixer/tree/v3.51.0"
+            },
+            "funding": [
+                {
+                    "url": "https://github.com/keradus",
+                    "type": "github"
+                }
+            ],
+            "time": "2024-02-28T19:50:06+00:00"
+        },
         {
             "name": "nikic/php-parser",
             "version": "v5.0.2",
@@ -4578,6 +4888,73 @@
             },
             "time": "2024-03-05T20:51:40+00:00"
         },
+        {
+            "name": "sebastian/diff",
+            "version": "6.0.1",
+            "source": {
+                "type": "git",
+                "url": "https://github.com/sebastianbergmann/diff.git",
+                "reference": "ab83243ecc233de5655b76f577711de9f842e712"
+            },
+            "dist": {
+                "type": "zip",
+                "url": "https://api.github.com/repos/sebastianbergmann/diff/zipball/ab83243ecc233de5655b76f577711de9f842e712",
+                "reference": "ab83243ecc233de5655b76f577711de9f842e712",
+                "shasum": ""
+            },
+            "require": {
+                "php": ">=8.2"
+            },
+            "require-dev": {
+                "phpunit/phpunit": "^11.0",
+                "symfony/process": "^4.2 || ^5"
+            },
+            "type": "library",
+            "extra": {
+                "branch-alias": {
+                    "dev-main": "6.0-dev"
+                }
+            },
+            "autoload": {
+                "classmap": [
+                    "src/"
+                ]
+            },
+            "notification-url": "https://packagist.org/downloads/",
+            "license": [
+                "BSD-3-Clause"
+            ],
+            "authors": [
+                {
+                    "name": "Sebastian Bergmann",
+                    "email": "sebastian@phpunit.de"
+                },
+                {
+                    "name": "Kore Nordmann",
+                    "email": "mail@kore-nordmann.de"
+                }
+            ],
+            "description": "Diff implementation",
+            "homepage": "https://github.com/sebastianbergmann/diff",
+            "keywords": [
+                "diff",
+                "udiff",
+                "unidiff",
+                "unified diff"
+            ],
+            "support": {
+                "issues": "https://github.com/sebastianbergmann/diff/issues",
+                "security": "https://github.com/sebastianbergmann/diff/security/policy",
+                "source": "https://github.com/sebastianbergmann/diff/tree/6.0.1"
+            },
+            "funding": [
+                {
+                    "url": "https://github.com/sebastianbergmann",
+                    "type": "github"
+                }
+            ],
+            "time": "2024-03-02T07:30:33+00:00"
+        },
         {
             "name": "symfony/debug-bundle",
             "version": "v6.4.3",
@@ -4744,6 +5121,73 @@
             ],
             "time": "2024-03-04T13:36:45+00:00"
         },
+        {
+            "name": "symfony/options-resolver",
+            "version": "v6.4.0",
+            "source": {
+                "type": "git",
+                "url": "https://github.com/symfony/options-resolver.git",
+                "reference": "22301f0e7fdeaacc14318928612dee79be99860e"
+            },
+            "dist": {
+                "type": "zip",
+                "url": "https://api.github.com/repos/symfony/options-resolver/zipball/22301f0e7fdeaacc14318928612dee79be99860e",
+                "reference": "22301f0e7fdeaacc14318928612dee79be99860e",
+                "shasum": ""
+            },
+            "require": {
+                "php": ">=8.1",
+                "symfony/deprecation-contracts": "^2.5|^3"
+            },
+            "type": "library",
+            "autoload": {
+                "psr-4": {
+                    "Symfony\\Component\\OptionsResolver\\": ""
+                },
+                "exclude-from-classmap": [
+                    "/Tests/"
+                ]
+            },
+            "notification-url": "https://packagist.org/downloads/",
+            "license": [
+                "MIT"
+            ],
+            "authors": [
+                {
+                    "name": "Fabien Potencier",
+                    "email": "fabien@symfony.com"
+                },
+                {
+                    "name": "Symfony Community",
+                    "homepage": "https://symfony.com/contributors"
+                }
+            ],
+            "description": "Provides an improved replacement for the array_replace PHP function",
+            "homepage": "https://symfony.com",
+            "keywords": [
+                "config",
+                "configuration",
+                "options"
+            ],
+            "support": {
+                "source": "https://github.com/symfony/options-resolver/tree/v6.4.0"
+            },
+            "funding": [
+                {
+                    "url": "https://symfony.com/sponsor",
+                    "type": "custom"
+                },
+                {
+                    "url": "https://github.com/fabpot",
+                    "type": "github"
+                },
+                {
+                    "url": "https://tidelift.com/funding/github/packagist/symfony/symfony",
+                    "type": "tidelift"
+                }
+            ],
+            "time": "2023-08-08T10:16:24+00:00"
+        },
         {
             "name": "symfony/process",
             "version": "v6.4.4",
diff --git a/backend/src/Controller/Api/ClassesController.php b/backend/src/Controller/Api/ClassesController.php
index 8888f56..9928859 100644
--- a/backend/src/Controller/Api/ClassesController.php
+++ b/backend/src/Controller/Api/ClassesController.php
@@ -1,11 +1,12 @@
 <?php
+
 // ClassesController.php
+
 namespace App\Controller\Api;
 
 use App\Service\ClassesScraperService;
 use App\Service\JsonService;
 use Symfony\Bundle\FrameworkBundle\Controller\AbstractController;
-use Symfony\Component\HttpFoundation\JsonResponse;
 use Symfony\Component\HttpFoundation\Response;
 use Symfony\Component\Routing\Annotation\Route;
 use Symfony\Contracts\HttpClient\Exception\TransportExceptionInterface;
@@ -21,7 +22,6 @@ public function __construct(ClassesScraperService $classesScraperService, JsonSe
         $this->jsonService = $jsonService;
     }
 
-
     /**
      * @throws TransportExceptionInterface
      */
@@ -30,6 +30,7 @@ public function getClasses(): Response
     {
         $classes = $this->classesScraperService->scrapeClasses();
         $jsonClasses = $this->jsonService->EntityToJson($classes);
+
         return new Response($jsonClasses, Response::HTTP_OK, ['Content-Type' => 'application/json']);
     }
 }
diff --git a/backend/src/Controller/Api/TimetableController.php b/backend/src/Controller/Api/TimetableController.php
index dd7d0a2..5f25e58 100644
--- a/backend/src/Controller/Api/TimetableController.php
+++ b/backend/src/Controller/Api/TimetableController.php
@@ -24,11 +24,9 @@ public function __construct(TimetableService $timetableService, JsonService $jso
         $this->jsonService = $jsonService;
     }
 
-
     /**
-     * Get the timetable for a given class
+     * Get the timetable for a given class.
      *
-     * @param Request $request
      * @throws TransportExceptionInterface
      * @throws ServerExceptionInterface
      * @throws RedirectionExceptionInterface
@@ -41,12 +39,13 @@ public function index(Request $request): Response
         if (!$classParam) {
             return $this->json(['error' => 'class_param is missing'], Response::HTTP_BAD_REQUEST);
         }
-        
+
         $xmlUrl = $this->timetableService->getXmlFile($classParam);
 
         if ($xmlUrl) {
             $timetable = $this->timetableService->fetchAndParseData($xmlUrl);
             $jsonTimeTable = $this->jsonService->EntityToJson($timetable);
+
             return new Response($jsonTimeTable, Response::HTTP_OK, ['Content-Type' => 'application/json']);
         } else {
             return $this->json(['error' => 'Invalid XML url'], Response::HTTP_BAD_REQUEST);
diff --git a/backend/src/Entity/EventHours.php b/backend/src/Entity/EventHours.php
index 1575c7f..7a2a79d 100644
--- a/backend/src/Entity/EventHours.php
+++ b/backend/src/Entity/EventHours.php
@@ -29,8 +29,6 @@ public function setId(?int $id): void
         $this->id = $id;
     }
 
-
-
     public function getStartAt(): ?string
     {
         return $this->startAt;
diff --git a/backend/src/Entity/WeekSchedule.php b/backend/src/Entity/WeekSchedule.php
index 988aca5..98dd553 100644
--- a/backend/src/Entity/WeekSchedule.php
+++ b/backend/src/Entity/WeekSchedule.php
@@ -21,7 +21,6 @@ class WeekSchedule
     #[ORM\OneToMany(targetEntity: DaySchedule::class, mappedBy: 'weekSchedule')]
     private Collection $DaySchedule;
 
-
     public function __construct()
     {
         $this->DaySchedule = new ArrayCollection();
@@ -80,6 +79,4 @@ public function removeDaySchedule(DaySchedule $daySchedule): static
 
         return $this;
     }
-
-
 }
diff --git a/backend/src/Service/ClassesScraperService.php b/backend/src/Service/ClassesScraperService.php
index 2d2e7ea..9ae65af 100644
--- a/backend/src/Service/ClassesScraperService.php
+++ b/backend/src/Service/ClassesScraperService.php
@@ -3,8 +3,8 @@
 namespace App\Service;
 
 use App\Entity\ClassGroups;
-use Symfony\Component\HttpClient\HttpClient;
 use Symfony\Component\DomCrawler\Crawler;
+use Symfony\Component\HttpClient\HttpClient;
 use Symfony\Contracts\HttpClient\Exception\TransportExceptionInterface;
 
 class ClassesScraperService
@@ -17,9 +17,8 @@ public function __construct(string $schedule_url)
     }
 
     /**
-     * Scrape the classes from the schedule website
+     * Scrape the classes from the schedule website.
      *
-     * @return array
      * @throws TransportExceptionInterface
      */
     public function scrapeClasses(): array
diff --git a/backend/src/Service/JsonService.php b/backend/src/Service/JsonService.php
index aa68bad..4dac926 100644
--- a/backend/src/Service/JsonService.php
+++ b/backend/src/Service/JsonService.php
@@ -10,12 +10,8 @@
 
 class JsonService
 {
-
     /**
-     * Convert an entity to a JSON string
-     *
-     * @param $entity
-     * @return string
+     * Convert an entity to a JSON string.
      */
     public function EntityToJson($entity): string
     {
@@ -30,10 +26,10 @@ public function EntityToJson($entity): string
             ],
         ];
 
-        $normalizer = array(new DateTimeNormalizer(), new ObjectNormalizer(null, null, null, null, null, null, $defaultContext));
+        $normalizer = [new DateTimeNormalizer(), new ObjectNormalizer(null, null, null, null, null, null, $defaultContext)];
 
         $serializer = new Serializer($normalizer, [$encoder]);
+
         return $serializer->serialize($entity, 'json');
     }
-
-}
\ No newline at end of file
+}
diff --git a/backend/src/Service/TimetableService.php b/backend/src/Service/TimetableService.php
index 8975005..f804683 100644
--- a/backend/src/Service/TimetableService.php
+++ b/backend/src/Service/TimetableService.php
@@ -13,7 +13,6 @@
 
 class TimetableService
 {
-
     private ClassesScraperService $classesScraperService;
     private string $schedule_url;
     private XMLService $xmlService;
@@ -26,10 +25,8 @@ public function __construct(ClassesScraperService $classesScraperService, string
     }
 
     /**
-     * Get the xml file for a given class
+     * Get the xml file for a given class.
      *
-     * @param string $classParam
-     * @return string|null
      * @throws TransportExceptionInterface
      */
     public function getXmlFile(string $classParam): ?string
@@ -38,7 +35,8 @@ public function getXmlFile(string $classParam): ?string
         foreach ($classesList as $class) {
             if ($class->getName() === $classParam) {
                 $encodedClassFile = str_replace(' ', '%20', $class->getFile());
-                return $this->schedule_url . $encodedClassFile;
+
+                return $this->schedule_url.$encodedClassFile;
             }
         }
 
@@ -46,27 +44,22 @@ public function getXmlFile(string $classParam): ?string
     }
 
     /**
-     * Define the time slots for the timetable
-     *
-     * @return array
+     * Define the time slots for the timetable.
      */
     public function defineCreneaux(): array
     {
         return [
-            "1" => ["start" => "8h30", "end" => "10h"],
-            "2" => ["start" => "10h30", "end" => "12h"],
-            "3" => ["start" => "12h", "end" => "13h30"],
-            "4" => ["start" => "13h30", "end" => "15h"],
-            "5" => ["start" => "15h15", "end" => "16h45"],
-            "6" => ["start" => "17h", "end" => "18h30"]
+            '1' => ['start' => '8h30', 'end' => '10h'],
+            '2' => ['start' => '10h30', 'end' => '12h'],
+            '3' => ['start' => '12h', 'end' => '13h30'],
+            '4' => ['start' => '13h30', 'end' => '15h'],
+            '5' => ['start' => '15h15', 'end' => '16h45'],
+            '6' => ['start' => '17h', 'end' => '18h30'],
         ];
     }
 
     /**
-     * Put the parsed data into entity objects
-     *
-     * @param array $parsedData
-     * @return array
+     * Put the parsed data into entity objects.
      */
     public function parseData(array $parsedData): array
     {
@@ -74,7 +67,6 @@ public function parseData(array $parsedData): array
         $weeks = [];
 
         foreach ($parsedData['GROUPE']['PLAGES']['SEMAINE'] as $week) {
-
             $weekSchedule = new WeekSchedule();
             $weekSchedule->setId($week['SemId']);
             $weekSchedule->setCode($week['SemCod']);
@@ -100,15 +92,14 @@ public function parseData(array $parsedData): array
 
                         $event = new Event();
                         $event->setCreneau($creneau['Creneau']);
-                        $event->setActivite($creneau['Activite'] ?? "Pas cours");
+                        $event->setActivite($creneau['Activite'] ?? 'Pas cours');
                         $event->setId($creneau['Id'] ?? 0);
-                        $event->setCouleur($creneau['Couleur'] ?? "#000000");
+                        $event->setCouleur($creneau['Couleur'] ?? '#000000');
                         $event->setHoraire($eventHours);
-                        $event->setSalle($creneau['Salles'] ?? "");
+                        $event->setSalle($creneau['Salles'] ?? '');
                         $event->setVisio(str_contains($creneau['Salles'] ?? null, 'Teams'));
 
                         $daySchedule->addEvent($event);
-
                     }
                 }
 
@@ -121,9 +112,10 @@ public function parseData(array $parsedData): array
     }
 
     /**
-     * Fetch and parse the xml file
+     * Fetch and parse the xml file.
      *
      * @param string $xmlUrl The url of the xml file
+     *
      * @throws TransportExceptionInterface
      * @throws ServerExceptionInterface
      * @throws RedirectionExceptionInterface
@@ -133,6 +125,7 @@ public function fetchAndParseData(string $xmlUrl): array
     {
         $xmlContent = $this->xmlService->fetchXmlData($xmlUrl);
         $parsedXml = $this->xmlService->parseXmlData($xmlContent);
+
         return $this->parseData($parsedXml);
     }
 }
diff --git a/backend/src/Service/XMLService.php b/backend/src/Service/XMLService.php
index 9888c81..6bba22d 100644
--- a/backend/src/Service/XMLService.php
+++ b/backend/src/Service/XMLService.php
@@ -11,9 +11,10 @@
 class XMLService
 {
     /**
-     * Fetch XML data from a given URL
+     * Fetch XML data from a given URL.
      *
      * @param string $xmlUrl The URL of the XML file
+     *
      * @throws TransportExceptionInterface
      * @throws ServerExceptionInterface
      * @throws RedirectionExceptionInterface
@@ -22,18 +23,19 @@ class XMLService
     public function fetchXmlData(string $xmlUrl): string
     {
         $httpClient = HttpClient::create();
+
         return $httpClient->request('GET', $xmlUrl)->getContent();
     }
 
-/**
-     * Parse XML data into an array
+    /**
+     * Parse XML data into an array.
      *
      * @param string $xmlContent The content of the XML file
-     * @return array
      */
     public function parseXmlData(string $xmlContent): array
     {
         $xmlHash = simplexml_load_string($xmlContent);
+
         return json_decode(json_encode($xmlHash), true);
     }
-}
\ No newline at end of file
+}
diff --git a/backend/symfony.lock b/backend/symfony.lock
index 64bf4cb..8602a7e 100644
--- a/backend/symfony.lock
+++ b/backend/symfony.lock
@@ -26,6 +26,18 @@
             "./migrations/.gitignore"
         ]
     },
+    "friendsofphp/php-cs-fixer": {
+        "version": "3.51",
+        "recipe": {
+            "repo": "github.com/symfony/recipes",
+            "branch": "main",
+            "version": "3.0",
+            "ref": "be2103eb4a20942e28a6dd87736669b757132435"
+        },
+        "files": [
+            "./.php-cs-fixer.dist.php"
+        ]
+    },
     "symfony/apache-pack": {
         "version": "1.0",
         "recipe": {
diff --git a/frontend/app_student/analysis_options.yaml b/frontend/app_student/analysis_options.yaml
index 0d29021..3570a3b 100644
--- a/frontend/app_student/analysis_options.yaml
+++ b/frontend/app_student/analysis_options.yaml
@@ -23,6 +23,9 @@ linter:
   rules:
     # avoid_print: false  # Uncomment to disable the `avoid_print` rule
     # prefer_single_quotes: true  # Uncomment to enable the `prefer_single_quotes` rule
+    avoid_print: true
+    prefer_single_quotes: true
+    prefer_const_constructors: true
 
 # Additional information about this file can be found at
 # https://dart.dev/guides/language/analysis-options
diff --git a/frontend/app_student/devtools_options.yaml b/frontend/app_student/devtools_options.yaml
new file mode 100644
index 0000000..7e7e7f6
--- /dev/null
+++ b/frontend/app_student/devtools_options.yaml
@@ -0,0 +1 @@
+extensions:
diff --git a/frontend/app_student/lib/classes/bloc/class_bloc.dart b/frontend/app_student/lib/classes/bloc/class_bloc.dart
index 8fdcab1..f07f1df 100644
--- a/frontend/app_student/lib/classes/bloc/class_bloc.dart
+++ b/frontend/app_student/lib/classes/bloc/class_bloc.dart
@@ -3,8 +3,6 @@ import 'dart:async';
 import 'package:app_student/api/classes/entities/class.dart';
 import 'package:app_student/api/classes/repositories/class_repository.dart';
 
-
-
 class ClassBloc {
   final ClassRepository classRepository;
   final _classController = StreamController<List<Class>>();
diff --git a/frontend/app_student/lib/classes/views/class.dart b/frontend/app_student/lib/classes/views/class.dart
index 465b331..0b8de9a 100644
--- a/frontend/app_student/lib/classes/views/class.dart
+++ b/frontend/app_student/lib/classes/views/class.dart
@@ -2,7 +2,6 @@ import 'package:app_student/api/classes/entities/class.dart';
 import 'package:flutter/material.dart';
 import 'package:app_student/classes/bloc/class_bloc.dart';
 
-
 class ClassListPage extends StatefulWidget {
   final ClassBloc classBloc;
 
diff --git a/frontend/app_student/lib/login/views/login_page.dart b/frontend/app_student/lib/login/views/login_page.dart
index 506e802..486d1ec 100644
--- a/frontend/app_student/lib/login/views/login_page.dart
+++ b/frontend/app_student/lib/login/views/login_page.dart
@@ -13,7 +13,7 @@ class LoginPage extends StatelessWidget {
       body: Column(
         children: [
           HeaderLogo(),
-          HeaderText("Bonjour :)"),
+          HeaderText('Bonjour :)'),
           Expanded(child: FormLogin()),
         ],
       ),
diff --git a/frontend/app_student/lib/login/widgets/form/inputs/input_prenom.dart b/frontend/app_student/lib/login/widgets/form/inputs/input_prenom.dart
index d402f45..89219a2 100644
--- a/frontend/app_student/lib/login/widgets/form/inputs/input_prenom.dart
+++ b/frontend/app_student/lib/login/widgets/form/inputs/input_prenom.dart
@@ -27,7 +27,7 @@ class FirstnameTextField extends StatelessWidget {
               contentPadding:
                   const EdgeInsets.symmetric(vertical: 10.0, horizontal: 10.0),
               border: OutlineInputBorder(
-                borderSide: BorderSide(color: Colors.grey),
+                borderSide: const BorderSide(color: Colors.grey),
                 borderRadius: BorderRadius.circular(3.0),
               ),
               focusedBorder: OutlineInputBorder(