diff --git a/src/Composer/Command/DependsCommand.php b/src/Composer/Command/DependsCommand.php
index 9079e46af..aa720adaa 100644
--- a/src/Composer/Command/DependsCommand.php
+++ b/src/Composer/Command/DependsCommand.php
@@ -63,7 +63,6 @@ EOT
         $needle = $input->getArgument('package');
 
         $references = array();
-        $recommendedDependencies = array();
 
         // check if we have a local installation so we can grab the right package/version
         $repos = array_merge(
diff --git a/src/Composer/Command/UpdateCommand.php b/src/Composer/Command/UpdateCommand.php
index 4384b955f..6b46199c0 100644
--- a/src/Composer/Command/UpdateCommand.php
+++ b/src/Composer/Command/UpdateCommand.php
@@ -53,9 +53,8 @@ EOT
 
     protected function execute(InputInterface $input, OutputInterface $output)
     {
-        $composer = $this->getComposer();
-
         $installCommand = $this->getApplication()->find('install');
+
         return $installCommand->install($input, $output, true);
     }
 }
diff --git a/src/Composer/DependencyResolver/Solver.php b/src/Composer/DependencyResolver/Solver.php
index cc1ec4e92..2b6498965 100644
--- a/src/Composer/DependencyResolver/Solver.php
+++ b/src/Composer/DependencyResolver/Solver.php
@@ -1078,9 +1078,7 @@ class Solver
     protected function createTransaction()
     {
         $transaction = array();
-
         $installMeansUpdateMap = array();
-        $ignoreRemoveMap = array();
 
         foreach ($this->decisionQueue as $i => $literal) {
             $package = $literal->getPackage();
@@ -1739,7 +1737,7 @@ class Solver
 
         $level = 1;
         $systemLevel = $level + 1;
-        $minimizationsteps = 0;
+        $minimizationSteps = 0;
         $installedPos = 0;
 
         $this->installedPackages = $this->installed->getPackages();
@@ -1930,7 +1928,7 @@ class Solver
                     $installedPos = 0;
                 }
 
-                $systemlevel = $level + 1;
+                $systemLevel = $level + 1;
 
                 if ($pass < 2) {
                     // had trouble => retry
diff --git a/src/Composer/Downloader/FileDownloader.php b/src/Composer/Downloader/FileDownloader.php
index aeb655be4..4508eb294 100644
--- a/src/Composer/Downloader/FileDownloader.php
+++ b/src/Composer/Downloader/FileDownloader.php
@@ -75,7 +75,7 @@ abstract class FileDownloader implements DownloaderInterface
                 ),
             ));
 
-            copy($url, $filename, $ctx);
+            copy($url, $fileName, $ctx);
         } else {
             copy($url, $fileName);
         }
diff --git a/src/Composer/Package/Loader/RootPackageLoader.php b/src/Composer/Package/Loader/RootPackageLoader.php
index 1ce78cc82..294dd3f42 100644
--- a/src/Composer/Package/Loader/RootPackageLoader.php
+++ b/src/Composer/Package/Loader/RootPackageLoader.php
@@ -44,7 +44,6 @@ class RootPackageLoader extends ArrayLoader
         $package = parent::load($config);
 
         if (isset($config['repositories'])) {
-            $repositories = array();
             foreach ($config['repositories'] as $repoName => $repo) {
                 if (false === $repo && 'packagist' === $repoName) {
                     continue;
diff --git a/src/Composer/Package/Version/VersionParser.php b/src/Composer/Package/Version/VersionParser.php
index e5006d824..7bd941d93 100644
--- a/src/Composer/Package/Version/VersionParser.php
+++ b/src/Composer/Package/Version/VersionParser.php
@@ -112,7 +112,7 @@ class VersionParser
 
         if (count($constraints) > 1) {
             $constraintObjects = array();
-            foreach ($constraints as $key => $constraint) {
+            foreach ($constraints as $constraint) {
                 $constraintObjects = array_merge($constraintObjects, $this->parseConstraint($constraint));
             }
         } else {
diff --git a/src/Composer/Repository/PearRepository.php b/src/Composer/Repository/PearRepository.php
index b19620b3a..0e00a39c7 100644
--- a/src/Composer/Repository/PearRepository.php
+++ b/src/Composer/Repository/PearRepository.php
@@ -102,7 +102,6 @@ class PearRepository extends ArrayRepository
                     }
                     $deps = unserialize($deps);
                     if (isset($deps['required']['package'])) {
-                        $requires = array();
 
                         if (isset($deps['required']['package']['name'])) {
                             $deps['required']['package'] = array($deps['required']['package']);
diff --git a/src/Composer/Repository/Vcs/GitBitbucketDriver.php b/src/Composer/Repository/Vcs/GitBitbucketDriver.php
index 0578a8e85..6a15a4fa7 100644
--- a/src/Composer/Repository/Vcs/GitBitbucketDriver.php
+++ b/src/Composer/Repository/Vcs/GitBitbucketDriver.php
@@ -158,6 +158,6 @@ class GitBitbucketDriver implements VcsDriverInterface
      */
     public static function supports($url, $deep = false)
     {
-        return preg_match('#^https://bitbucket\.org/([^/]+)/(.+?)\.git$#', $url, $match);
+        return preg_match('#^https://bitbucket\.org/([^/]+)/(.+?)\.git$#', $url);
     }
 }
diff --git a/src/Composer/Repository/Vcs/GitHubDriver.php b/src/Composer/Repository/Vcs/GitHubDriver.php
index 44227ef91..8e7cb46c5 100644
--- a/src/Composer/Repository/Vcs/GitHubDriver.php
+++ b/src/Composer/Repository/Vcs/GitHubDriver.php
@@ -146,6 +146,6 @@ class GitHubDriver implements VcsDriverInterface
      */
     public static function supports($url, $deep = false)
     {
-        return extension_loaded('openssl') && preg_match('#^(?:https?|git)://github\.com/([^/]+)/(.+?)(?:\.git)?$#', $url, $match);
+        return extension_loaded('openssl') && preg_match('#^(?:https?|git)://github\.com/([^/]+)/(.+?)(?:\.git)?$#', $url);
     }
 }
diff --git a/src/Composer/Repository/Vcs/HgBitbucketDriver.php b/src/Composer/Repository/Vcs/HgBitbucketDriver.php
index 515e90d36..3594270d6 100644
--- a/src/Composer/Repository/Vcs/HgBitbucketDriver.php
+++ b/src/Composer/Repository/Vcs/HgBitbucketDriver.php
@@ -158,6 +158,6 @@ class HgBitbucketDriver implements VcsDriverInterface
      */
     public static function supports($url, $deep = false)
     {
-        return preg_match('#^https://bitbucket\.org/([^/]+)/([^/]+)/?$#', $url, $match);
+        return preg_match('#^https://bitbucket\.org/([^/]+)/([^/]+)/?$#', $url);
     }
 }
diff --git a/src/Composer/Repository/VcsRepository.php b/src/Composer/Repository/VcsRepository.php
index 9b66963bc..009f66549 100644
--- a/src/Composer/Repository/VcsRepository.php
+++ b/src/Composer/Repository/VcsRepository.php
@@ -70,7 +70,6 @@ class VcsRepository extends ArrayRepository
 
         $versionParser = new VersionParser;
         $loader = new ArrayLoader();
-        $versions = array();
 
         if ($driver->hasComposerFile($driver->getRootIdentifier())) {
             $data = $driver->getComposerInformation($driver->getRootIdentifier());