diff -ru src/Flex.php src/Flex.php
--- src/Flex.php	2024-11-29 17:48:10.072374795 +0000
+++ src/Flex.php	2024-11-29 17:48:12.219378703 +0000
@@ -360,7 +360,7 @@
         $runtime = $this->options->get('runtime');
         $dotenvPath = $rootDir.'/'.($runtime['dotenv_path'] ?? '.env');
 
-        if (!file_exists($dotenvPath) && !file_exists($dotenvPath.'.local') && file_exists($dotenvPath.'.dist') && false === strpos(file_get_contents($dotenvPath.'.dist'), '.env.local')) {
+        if (!file_exists($dotenvPath) && !file_exists($dotenvPath.'.local') && file_exists($dotenvPath.'.dist') && !str_contains(file_get_contents($dotenvPath.'.dist'), '.env.local')) {
             copy($dotenvPath.'.dist', $dotenvPath);
         }
 
@@ -374,7 +374,7 @@
 
             $this->io->writeError('');
             $this->io->writeError('What about running <comment>composer global require symfony/thanks && composer thanks</> now?');
-            $this->io->writeError(sprintf('This will spread some %s by sending a %s to the GitHub repositories of your fellow package maintainers.', $love, $star));
+            $this->io->writeError(\sprintf('This will spread some %s by sending a %s to the GitHub repositories of your fellow package maintainers.', $love, $star));
         }
 
         $this->io->writeError('');
@@ -392,7 +392,7 @@
             return;
         }
 
-        $this->io->writeError(sprintf('<info>Symfony operations: %d recipe%s (%s)</>', \count($recipes), \count($recipes) > 1 ? 's' : '', $this->downloader->getSessionId()));
+        $this->io->writeError(\sprintf('<info>Symfony operations: %d recipe%s (%s)</>', \count($recipes), \count($recipes) > 1 ? 's' : '', $this->downloader->getSessionId()));
         $installContribs = $this->composer->getPackage()->getExtra()['symfony']['allow-contrib'] ?? false;
         $manifest = null;
         $originalComposerJsonHash = $this->getComposerJsonHash();
@@ -400,8 +400,8 @@
         foreach ($recipes as $recipe) {
             if ('install' === $recipe->getJob() && !$installContribs && $recipe->isContrib()) {
                 $warning = $this->io->isInteractive() ? 'WARNING' : 'IGNORING';
-                $this->io->writeError(sprintf('  - <warning> %s </> %s', $warning, $this->formatOrigin($recipe)));
-                $question = sprintf('    The recipe for this package comes from the "contrib" repository, which is open to community contributions.
+                $this->io->writeError(\sprintf('  - <warning> %s </> %s', $warning, $this->formatOrigin($recipe)));
+                $question = \sprintf('    The recipe for this package comes from the "contrib" repository, which is open to community contributions.
     Review the recipe at %s
 
     Do you want to execute this recipe?
@@ -444,13 +444,13 @@
             switch ($recipe->getJob()) {
                 case 'install':
                     $postInstallRecipes[] = $recipe;
-                    $this->io->writeError(sprintf('  - Configuring %s', $this->formatOrigin($recipe)));
+                    $this->io->writeError(\sprintf('  - Configuring %s', $this->formatOrigin($recipe)));
                     $this->configurator->install($recipe, $this->lock, [
                         'force' => $event instanceof UpdateEvent && $event->force(),
                     ]);
                     $manifest = $recipe->getManifest();
                     if (isset($manifest['post-install-output'])) {
-                        $this->postInstallOutput[] = sprintf('<bg=yellow;fg=white> %s </> instructions:', $recipe->getName());
+                        $this->postInstallOutput[] = \sprintf('<bg=yellow;fg=white> %s </> instructions:', $recipe->getName());
                         $this->postInstallOutput[] = '';
                         foreach ($manifest['post-install-output'] as $line) {
                             $this->postInstallOutput[] = $this->options->expandTargetDir($line);
@@ -461,7 +461,7 @@
                 case 'update':
                     break;
                 case 'uninstall':
-                    $this->io->writeError(sprintf('  - Unconfiguring %s', $this->formatOrigin($recipe)));
+                    $this->io->writeError(\sprintf('  - Unconfiguring %s', $this->formatOrigin($recipe)));
                     $this->configurator->unconfigure($recipe, $this->lock);
                     break;
             }
@@ -594,7 +594,7 @@
             $job = method_exists($operation, 'getOperationType') ? $operation->getOperationType() : $operation->getJobType();
 
             if (!isset($manifests[$name]) && isset($data['conflicts'][$name])) {
-                $this->io->writeError(sprintf('  - Skipping recipe for %s: all versions of the recipe conflict with your package versions.', $name));
+                $this->io->writeError(\sprintf('  - Skipping recipe for %s: all versions of the recipe conflict with your package versions.', $name));
                 continue;
             }
 
@@ -605,7 +605,7 @@
 
                 if (!isset($newManifests[$name])) {
                     // no older recipe found
-                    $this->io->writeError(sprintf('  - Skipping recipe for %s: all versions of the recipe conflict with your package versions.', $name));
+                    $this->io->writeError(\sprintf('  - Skipping recipe for %s: all versions of the recipe conflict with your package versions.', $name));
 
                     continue 2;
                 }
@@ -654,7 +654,7 @@
 
                 if ($bundles) {
                     $manifest = [
-                        'origin' => sprintf('%s:%s@auto-generated recipe', $name, $package->getPrettyVersion()),
+                        'origin' => \sprintf('%s:%s@auto-generated recipe', $name, $package->getPrettyVersion()),
                         'manifest' => ['bundles' => $bundles],
                     ];
                     $recipes[$name] = new Recipe($package, $name, $job, $manifest);
@@ -727,7 +727,7 @@
             return $origin;
         }
 
-        return sprintf('<info>%s</> (<comment>>=%s</>): From %s', $matches[1], $matches[2], 'auto-generated recipe' === $matches[3] ? '<comment>'.$matches[3].'</>' : $matches[3]);
+        return \sprintf('<info>%s</> (<comment>>=%s</>): From %s', $matches[1], $matches[2], 'auto-generated recipe' === $matches[3] ? '<comment>'.$matches[3].'</>' : $matches[3]);
     }
 
     private function shouldRecordOperation(OperationInterface $operation, bool $isDevMode, ?Composer $composer = null): bool
@@ -797,7 +797,7 @@
 
         $this->io->writeError('<info>Unpacking Symfony packs</>');
         foreach ($result->getUnpacked() as $pkg) {
-            $this->io->writeError(sprintf('  - Unpacked <info>%s</>', $pkg->getName()));
+            $this->io->writeError(\sprintf('  - Unpacked <info>%s</>', $pkg->getName()));
         }
 
         $unpacker->updateLock($result, $this->io);
diff -ru tests/FlexTest.php tests/FlexTest.php
--- tests/FlexTest.php	2024-11-29 17:48:10.341375284 +0000
+++ tests/FlexTest.php	2024-11-29 17:48:13.123380348 +0000
@@ -163,7 +163,7 @@
                 }
 
                 $expectedManifest = [
-                    'origin' => sprintf('%s:%s@auto-generated recipe', $package->getName(),
+                    'origin' => \sprintf('%s:%s@auto-generated recipe', $package->getName(),
                         $package->getPrettyVersion()),
                     'manifest' => ['bundles' => []],
                 ];