diff --git a/src/Composer/Command/CheckPlatformReqsCommand.php b/src/Composer/Command/CheckPlatformReqsCommand.php
index cc4b48f6a..568351f50 100644
--- a/src/Composer/Command/CheckPlatformReqsCommand.php
+++ b/src/Composer/Command/CheckPlatformReqsCommand.php
@@ -50,7 +50,6 @@ EOT
         $requires = array();
         if ($input->getOption('no-dev')) {
             $installedRepo = $composer->getLocker()->getLockedRepository(!$input->getOption('no-dev'));
-            $dependencies = $installedRepo->getPackages();
         } else {
             $installedRepo = $composer->getRepositoryManager()->getLocalRepository();
             // fallback to lockfile if installed repo is empty
diff --git a/src/Composer/Command/ConfigCommand.php b/src/Composer/Command/ConfigCommand.php
index 099e5c872..518bb7ff3 100644
--- a/src/Composer/Command/ConfigCommand.php
+++ b/src/Composer/Command/ConfigCommand.php
@@ -291,7 +291,7 @@ EOT
                 $value = $data;
             } elseif (isset($data['config'][$settingKey])) {
                 $value = $this->config->get($settingKey, $input->getOption('absolute') ? 0 : Config::RELATIVE_PATHS);
-            } elseif (in_array($settingKey, $properties, true) && isset($rawData[$settingKey])) {
+            } elseif (isset($rawData[$settingKey]) && in_array($settingKey, $properties, true)) {
                 $value = $rawData[$settingKey];
             } else {
                 throw new \RuntimeException($settingKey.' is not defined');
diff --git a/src/Composer/Command/ShowCommand.php b/src/Composer/Command/ShowCommand.php
index 6a6315a64..6a23602e0 100644
--- a/src/Composer/Command/ShowCommand.php
+++ b/src/Composer/Command/ShowCommand.php
@@ -423,7 +423,9 @@ EOT
                         $packageIsIgnored = \in_array($package->getPrettyName(), $ignoredPackages, true);
                         if ($input->getOption('outdated') && ($packageIsUpToDate || $packageIsIgnored)) {
                             continue;
-                        } elseif ($input->getOption('outdated') || $input->getOption('strict')) {
+                        }
+
+                        if ($input->getOption('outdated') || $input->getOption('strict')) {
                             $hasOutdatedPackages = true;
                         }
 
@@ -679,11 +681,7 @@ EOT
             foreach ($package->getAutoload() as $type => $autoloads) {
                 $io->write('<comment>' . $type . '</comment>');
 
-                if ($type === 'psr-0') {
-                    foreach ($autoloads as $name => $path) {
-                        $io->write(($name ?: '*') . ' => ' . (is_array($path) ? implode(', ', $path) : ($path ?: '.')));
-                    }
-                } elseif ($type === 'psr-4') {
+                if ($type === 'psr-0' || $type === 'psr-4') {
                     foreach ($autoloads as $name => $path) {
                         $io->write(($name ?: '*') . ' => ' . (is_array($path) ? implode(', ', $path) : ($path ?: '.')));
                     }
diff --git a/src/Composer/Command/StatusCommand.php b/src/Composer/Command/StatusCommand.php
index e4de749f1..45affa9e5 100644
--- a/src/Composer/Command/StatusCommand.php
+++ b/src/Composer/Command/StatusCommand.php
@@ -121,7 +121,7 @@ EOT
             }
 
             if ($downloader instanceof VcsCapableDownloaderInterface) {
-                if ($currentRef = $downloader->getVcsReference($package, $targetDir)) {
+                if ($downloader->getVcsReference($package, $targetDir)) {
                     switch ($package->getInstallationSource()) {
                         case 'source':
                             $previousRef = $package->getSourceReference();
diff --git a/src/Composer/Command/SuggestsCommand.php b/src/Composer/Command/SuggestsCommand.php
index d874d1d19..cb1f4e9a6 100644
--- a/src/Composer/Command/SuggestsCommand.php
+++ b/src/Composer/Command/SuggestsCommand.php
@@ -83,7 +83,7 @@ EOT
 
         // Determine output mode, default is by-package
         $mode = SuggestedPackagesReporter::MODE_BY_PACKAGE;
-        $io = $this->getIO();
+
         // if by-suggestion is given we override the default
         if ($input->getOption('by-suggestion')) {
             $mode = SuggestedPackagesReporter::MODE_BY_SUGGESTION;
diff --git a/src/Composer/Command/ValidateCommand.php b/src/Composer/Command/ValidateCommand.php
index 1c76d678d..128064f8e 100644
--- a/src/Composer/Command/ValidateCommand.php
+++ b/src/Composer/Command/ValidateCommand.php
@@ -122,9 +122,8 @@ EOT
 
         $commandEvent = new CommandEvent(PluginEvents::COMMAND, 'validate', $input, $output);
         $eventCode = $composer->getEventDispatcher()->dispatch($commandEvent->getName(), $commandEvent);
-        $exitCode = max($eventCode, $exitCode);
 
-        return $exitCode;
+        return max($eventCode, $exitCode);
     }
 
     private function outputResult($io, $name, &$errors, &$warnings, $checkPublish = false, $publishErrors = array(), $checkLock = false, $lockErrors = array(), $printSchemaUrl = false)