diff --git a/lib/app.php b/lib/app.php
index caf8bd8252..2b975de9ef 100755
--- a/lib/app.php
+++ b/lib/app.php
@@ -27,7 +27,6 @@
  * upgrading and removing apps.
  */
 class OC_App{
-	static private $init = false;
 	static private $activeapp = '';
 	static private $navigation = array();
 	static private $settingsForms = array();
diff --git a/lib/db.php b/lib/db.php
index 2a06d72ea3..6f083d17cf 100644
--- a/lib/db.php
+++ b/lib/db.php
@@ -33,8 +33,6 @@ class OC_DB {
 	static private $MDB2=false;
 	static private $PDO=false;
 	static private $schema=false;
-	static private $affected=0;
-	static private $result=false;
 	static private $inTransaction=false;
 	static private $prefix=null;
 	static private $type=null;
@@ -222,7 +220,7 @@ class OC_DB {
 				echo( '<b>can not connect to database, using '.$type.'. ('.self::$MDB2->getUserInfo().')</center>');
 				OC_Log::write('core',self::$MDB2->getUserInfo(),OC_Log::FATAL);
 				OC_Log::write('core',self::$MDB2->getMessage(),OC_Log::FATAL);
-				die( $error );
+				die();
 			}
 			
 			// We always, really always want associative arrays
@@ -519,8 +517,9 @@ class OC_DB {
 		
 		// Delete our temporary file
 		unlink( $file2 );
-		foreach($definition['tables'] as $name=>$table){
-			self::dropTable($name);
+		$tables=array_keys($definition['tables']);
+		foreach($tables as $table){
+			self::dropTable($table);
 		}
 	}
 	
diff --git a/lib/filestorage.php b/lib/filestorage.php
index 71ef4aed00..e786127d52 100644
--- a/lib/filestorage.php
+++ b/lib/filestorage.php
@@ -24,7 +24,7 @@
  * Provde a common interface to all different storage options
  */
 abstract class OC_Filestorage{
-	public function __construct($parameters){}
+	abstract public function __construct($parameters);
 	abstract public function mkdir($path);
 	abstract public function rmdir($path);
 	abstract public function opendir($path);
diff --git a/lib/filesystem.php b/lib/filesystem.php
index 65318fa3ab..5b31ed6c70 100644
--- a/lib/filesystem.php
+++ b/lib/filesystem.php
@@ -46,9 +46,10 @@
 class OC_Filesystem{
 	static private $storages=array();
 	static private $mounts=array();
-	static private $storageTypes=array();
 	public static $loaded=false;
-	private $fakeRoot='';
+	/**
+	 * @var OC_Filestorage $defaultInstance
+	 */
 	static private $defaultInstance;
 
 
@@ -155,7 +156,8 @@ class OC_Filesystem{
 		}
 		$path=str_replace('//', '/',$path);
 		$foundMountPoint='';
-		foreach(OC_Filesystem::$mounts as $mountpoint=>$storage){
+		$mountPoints=array_keys(OC_Filesystem::$mounts);
+		foreach($mountPoints as $mountpoint){
 			if($mountpoint==$path){
 				return $mountpoint;
 			}
@@ -260,10 +262,7 @@ class OC_Filesystem{
 	 * tear down the filesystem, removing all storage providers
 	 */
 	static public function tearDown(){
-		foreach(self::$storages as $mountpoint=>$storage){
-			unset(self::$storages[$mountpoint]);
-		}
-		$fakeRoot='';
+		self::$storages=array();
 	}
 	
 	/**
@@ -287,7 +286,7 @@ class OC_Filesystem{
 	* @return bool
 	*/
 	static public function chroot($fakeRoot){
-		return self::$defaultInstance->chroot($path);
+		return self::$defaultInstance->chroot($fakeRoot);
 	}
 
 	/**
@@ -485,7 +484,7 @@ class OC_Filesystem{
 	 * @return bool
 	 */
 	static public function hasUpdated($path,$time){
-		return self::$defaultInstance->hasUpdated($path);
+		return self::$defaultInstance->hasUpdated($path,$time);
 	}
 }
 
diff --git a/lib/filesystemview.php b/lib/filesystemview.php
index 448663bb08..a23d7bbe7f 100644
--- a/lib/filesystemview.php
+++ b/lib/filesystemview.php
@@ -393,7 +393,7 @@ class OC_FilesystemView {
 		return $this->basicOperation('getMimeType',$path);
 	}
 	public function hash($type,$path){
-		return $this->basicOperation('hash',$path,array('read'));
+		return $this->basicOperation('hash',$path,array('read'),$type);
 	}
 
 	public function free_space($path='/'){
diff --git a/lib/helper.php b/lib/helper.php
index 0d18098a4e..c4f7e8b2e1 100644
--- a/lib/helper.php
+++ b/lib/helper.php
@@ -676,10 +676,10 @@ class OC_Helper {
 	*/
 	public static function mb_str_replace($search, $replace, $subject, $encoding = 'UTF-8', &$count = null) {
 		$offset = -1;
-		$length = mb_strlen($search, 'UTF-8');
-		while(($i = mb_strrpos($subject, $search, $offset, 'UTF-8'))) {
+		$length = mb_strlen($search, $encoding);
+		while(($i = mb_strrpos($subject, $search, $offset, $encoding))) {
 			$subject = OC_Helper::mb_substr_replace($subject, $replace, $i, $length);
-			$offset = $i - mb_strlen($subject, 'UTF-8') - 1;
+			$offset = $i - mb_strlen($subject, $encoding) - 1;
 			$count++;
 		}
 		return $subject;
diff --git a/lib/image.php b/lib/image.php
index 01e843d831..c438b3d67f 100644
--- a/lib/image.php
+++ b/lib/image.php
@@ -24,8 +24,8 @@
 //From user comments at http://dk2.php.net/manual/en/function.exif-imagetype.php
 if ( ! function_exists( 'exif_imagetype' ) ) {
     function exif_imagetype ( $filename ) {
-        if ( ( list($width, $height, $type, $attr) = getimagesize( $filename ) ) !== false ) {
-            return $type;
+        if ( ( $info = getimagesize( $filename ) ) !== false ) {
+            return $info[2];
         }
     return false;
     }
@@ -364,7 +364,7 @@ class OC_Image {
 	public function load($imageref) {
 		if(is_resource($imageref)) {
 			if(get_resource_type($imageref) == 'gd') {
-				$this->resource = $res;
+				$this->resource = $imageref;
 				return $this->resource;
 			} elseif(in_array(get_resource_type($imageref), array('file','stream'))) {
 				return $this->loadFromFileHandle($imageref);
@@ -650,9 +650,6 @@ class OC_Image {
 			OC_Log::write('core',__METHOD__.'(): No image loaded', OC_Log::ERROR);
 			return false;
 		}
-		$width_orig=imageSX($this->resource);
-		$height_orig=imageSY($this->resource);
-		//OC_Log::write('core',__METHOD__.'(): Original size: '.$width_orig.'x'.$height_orig, OC_Log::DEBUG);
 		$process = imagecreatetruecolor($w, $h);
 		if ($process == false) {
 			OC_Log::write('core',__METHOD__.'(): Error creating true color image',OC_Log::ERROR);
diff --git a/lib/migrate.php b/lib/migrate.php
index f788a637d3..1b6367ed6e 100644
--- a/lib/migrate.php
+++ b/lib/migrate.php
@@ -91,7 +91,7 @@ class OC_Migrate{
 	 	if( self::$exporttype == 'user' ){
 	 		// Check user exists
 	 		if( !is_null($uid) ){
-                                $db = new OC_User_Database;
+				$db = new OC_User_Database;
 		 		if( !$db->userExists( $uid ) ){
 					OC_Log::write('migration', 'User: '.$uid.' is not in the database and so cannot be exported.', OC_Log::ERROR);
 					return json_encode( array( 'success' => false ) );
diff --git a/lib/ocs.php b/lib/ocs.php
index 1be41202d7..77dd437d6c 100644
--- a/lib/ocs.php
+++ b/lib/ocs.php
@@ -88,7 +88,6 @@ class OC_OCS {
        $method='get';
     }elseif($_SERVER['REQUEST_METHOD'] == 'PUT') {
        $method='put';
-       parse_str(file_get_contents("php://input"),$put_vars);
     }elseif($_SERVER['REQUEST_METHOD'] == 'POST') {
        $method='post';
     }else{
@@ -356,9 +355,6 @@ class OC_OCS {
    * @return string xml/json
    */
   private static function apiConfig($format) {
-    $user=OC_OCS::checkpassword(false);
-    $url=substr(OCP\Util::getServerHost().$_SERVER['SCRIPT_NAME'],0,-11).'';
-
     $xml['version']='1.5';
     $xml['website']='ownCloud';
     $xml['host']=OCP\Util::getServerHost();
@@ -416,7 +412,7 @@ class OC_OCS {
    */
   private static function activityPut($format,$message) {
     // not implemented in ownCloud
-    $user=OC_OCS::checkpassword();
+    OC_OCS::checkpassword();
     echo(OC_OCS::generatexml($format,'ok',100,''));
   }
 
diff --git a/lib/ocsclient.php b/lib/ocsclient.php
index 951d761d7e..ae35470cff 100644
--- a/lib/ocsclient.php
+++ b/lib/ocsclient.php
@@ -71,7 +71,7 @@ class OC_OCSClient{
 		$tmp=$data->data;
 		$cats=array();
 
-		foreach($tmp->category as $key=>$value) {
+		foreach($tmp->category as $value) {
 
 			$id= (int) $value->id;
 			$name= (string) $value->name;
diff --git a/lib/preferences.php b/lib/preferences.php
index f72378ce94..c91423e69b 100644
--- a/lib/preferences.php
+++ b/lib/preferences.php
@@ -165,7 +165,7 @@ class OC_Preferences{
 	public static function deleteKey( $user, $app, $key ){
 		// No need for more comments
 		$query = OC_DB::prepare( 'DELETE FROM *PREFIX*preferences WHERE userid = ? AND appid = ? AND configkey = ?' );
-		$result = $query->execute( array( $user, $app, $key ));
+		$query->execute( array( $user, $app, $key ));
 
 		return true;
 	}
@@ -181,7 +181,7 @@ class OC_Preferences{
 	public static function deleteApp( $user, $app ){
 		// No need for more comments
 		$query = OC_DB::prepare( 'DELETE FROM *PREFIX*preferences WHERE userid = ? AND appid = ?' );
-		$result = $query->execute( array( $user, $app ));
+		$query->execute( array( $user, $app ));
 
 		return true;
 	}
@@ -196,7 +196,7 @@ class OC_Preferences{
 	public static function deleteUser( $user ){
 		// No need for more comments
 		$query = OC_DB::prepare( 'DELETE FROM *PREFIX*preferences WHERE userid = ?' );
-		$result = $query->execute( array( $user ));
+		$query->execute( array( $user ));
 
 		return true;
 	}
@@ -211,7 +211,7 @@ class OC_Preferences{
 	public static function deleteAppFromAllUsers( $app ){
 		// No need for more comments
 		$query = OC_DB::prepare( 'DELETE FROM *PREFIX*preferences WHERE appid = ?' );
-		$result = $query->execute( array( $app ));
+		$query->execute( array( $app ));
 
 		return true;
 	}
diff --git a/lib/setup.php b/lib/setup.php
index 027c84db09..4d71bed86e 100644
--- a/lib/setup.php
+++ b/lib/setup.php
@@ -102,7 +102,6 @@ class OC_Setup {
 				}
 				else {
 					$oldUser=OC_Config::getValue('dbuser', false);
-					$oldPassword=OC_Config::getValue('dbpassword', false);
 					
 					$query="SELECT user FROM mysql.user WHERE user='$dbuser'"; //this should be enough to check for admin rights in mysql
 					if(mysql_query($query, $connection)) {
diff --git a/lib/streamwrappers.php b/lib/streamwrappers.php
index f1e0fa0e1d..f502c6170b 100644
--- a/lib/streamwrappers.php
+++ b/lib/streamwrappers.php
@@ -1,6 +1,4 @@
 <?php
-global $FAKEDIRS;
-$FAKEDIRS=array();
 
 class OC_FakeDirStream{
 	public static $dirs=array();
@@ -8,8 +6,6 @@ class OC_FakeDirStream{
 	private $index;
 
 	public function dir_opendir($path,$options){
-		global $FAKEDIRS;
-		$url=parse_url($path);
 		$this->name=substr($path,strlen('fakedir://'));
 		$this->index=0;
 		if(!isset(self::$dirs[$this->name])){
@@ -161,7 +157,6 @@ class OC_StaticStreamWrapper {
 	public function stream_write($data) {
 		if (!$this->writable) return 0;
 		$size = strlen($data);
-		$len = strlen(self::$data[$this->path]);
 		if ($this->stream_eof()) {
 			self::$data[$this->path] .= $data;
 		} else {
diff --git a/lib/template.php b/lib/template.php
index 3b48c27b9b..5b6999af53 100644
--- a/lib/template.php
+++ b/lib/template.php
@@ -82,7 +82,6 @@ function relative_modified_date($timestamp) {
 	$diffhours = round($diffminutes/60);
 	$diffdays = round($diffhours/24);
 	$diffmonths = round($diffdays/31);
-	$diffyears = round($diffdays/365);
 
 	if($timediff < 60) { return $l->t('seconds ago'); }
 	else if($timediff < 120) { return $l->t('1 minute ago'); }
diff --git a/lib/templatelayout.php b/lib/templatelayout.php
index d33a87e9e4..588a784599 100644
--- a/lib/templatelayout.php
+++ b/lib/templatelayout.php
@@ -123,7 +123,7 @@ class OC_TemplateLayout extends OC_Template {
 					elseif(self::appendIfExist($files, $apps_dir['path'], $apps_dir['url'], "$style.css")) { $append =true; break; }
 				}
 				if(! $append) {
-					echo('css file not found: style:'.$script.' formfactor:'.$fext.' webroot:'.OC::$WEBROOT.' serverroot:'.OC::$SERVERROOT);
+					echo('css file not found: style:'.$style.' formfactor:'.$fext.' webroot:'.OC::$WEBROOT.' serverroot:'.OC::$SERVERROOT);
 					die();
 				}
 			}
diff --git a/lib/util.php b/lib/util.php
index 2a7b8a922f..f35e5a18e4 100755
--- a/lib/util.php
+++ b/lib/util.php
@@ -189,8 +189,6 @@ class OC_Util {
 		if(!(is_callable('sqlite_open') or class_exists('SQLite3')) and !is_callable('mysql_connect') and !is_callable('pg_connect')){
 			$errors[]=array('error'=>'No database drivers (sqlite, mysql, or postgresql) installed.<br/>','hint'=>'');//TODO: sane hint
 		}
-		$CONFIG_DBTYPE = OC_Config::getValue( "dbtype", "sqlite" );
-		$CONFIG_DBNAME = OC_Config::getValue( "dbname", "owncloud" );
 
 		//common hint for all file permissons error messages
 		$permissionsHint="Permissions can usually be fixed by giving the webserver write access to the ownCloud directory";