diff --git a/build/libifm.php b/build/libifm.php
index 866cd8d..0adfce3 100644
--- a/build/libifm.php
+++ b/build/libifm.php
@@ -3905,13 +3905,13 @@ f00bar;
 				$this->jsonResponse( array( "status" => "ERROR", "message" => $this->l['folder_not_found'] ) );
 			elseif (!$this->isPathValid($d['filename']))
 				$this->jsonResponse( array( "status" => "ERROR", "message" => $this->l['invalid_dir'] ) );
-			elseif (!$this->isFilenameValid($d['filename']))
+			elseif ($d['filename'] != "." && !$this->isFilenameValid($d['filename']))
 				$this->jsonResponse( array( "status" => "ERROR", "message" => $this->l['invalid_filename'] ) );
 			else {
 				unset( $zip );
 				$dfile = $this->pathCombine( __DIR__, $this->config['tmp_dir'], uniqid( "ifm-tmp-" ) . ".zip" ); // temporary filename
 				try {
-					IFMArchive::createZip( realpath( $d['filename'] ), $dfile );
+					IFMArchive::createZip(realpath($d['filename']), $dfile, array($this, 'isFilenameValid'));
 					if( $d['filename'] == "." ) {
 						if( getcwd() == $this->getScriptRoot() )
 							$d['filename'] = "root";
@@ -4340,7 +4340,7 @@ f00bar;
 	}
 
 	// check if filename is allowed
-	private function isFilenameValid( $f ) {
+	public function isFilenameValid( $f ) {
 		if( ! $this->isFilenameAllowed( $f ) )
 			return false;
 		if( strtoupper( substr( PHP_OS, 0, 3 ) ) == "WIN" ) {
@@ -4440,44 +4440,53 @@ class IFMArchive {
 	/**
 	 * Add a folder to an archive
 	 */
-	private static function addFolder( &$archive, $folder, $offset=0 ) {
-		if( $offset == 0 )
-			$offset = strlen( dirname( $folder ) ) + 1;
-		$archive->addEmptyDir( substr( $folder, $offset ) );
-		$handle = opendir( $folder );
-		while( false !== $f = readdir( $handle ) ) {
-			if( $f != '.' && $f != '..'  ) {
+	private static function addFolder(&$archive, $folder, $offset=0, $exclude_callback=null) {
+		if ($offset == 0)
+			$offset = strlen(dirname($folder)) + 1;
+		$archive->addEmptyDir(substr($folder, $offset));
+		$handle = opendir($folder);
+		while (false !== $f = readdir($handle)) {
+			if ($f != '.' && $f != '..') {
 				$filePath = $folder . '/' . $f;
-				if( file_exists( $filePath ) && is_readable( $filePath ) )
-					if( is_file( $filePath ) )
-						$archive->addFile( $filePath, substr( $filePath, $offset ) );
-					elseif( is_dir( $filePath ) )
-						self::addFolder( $archive, $filePath, $offset );
+				if (file_exists($filePath) && is_readable($filePath))
+					if (is_file($filePath))
+						if (!is_callable($exclude_callback) || $exclude_callback($f))
+							$archive->addFile( $filePath, substr( $filePath, $offset ) );
+					elseif (is_dir($filePath))
+						if (is_callable($exclude_callback))
+							self::addFolder($archive, $filePath, $offset, $exclude_callback);
+						else
+							self::addFolder($archive, $filePath, $offset);
 			}
 		}
-		closedir( $handle );
+		closedir($handle);
 	}
 
 	/**
 	 * Create a zip file
 	 */
-	public static function createZip( $src, $out )
-	{
+	public static function createZip($src, $out, $exclude_callback=null) {
 		$a = new ZipArchive();
-		$a->open( $out, ZIPARCHIVE::CREATE);
+		$a->open($out, ZIPARCHIVE::CREATE);
 
-		if( ! is_array( $src ) )
-			$src = array( $src );
+		if (!is_array($src))
+			$src = array($src);
 
-		foreach( $src as $s )
-			if( is_dir( $s ) )
-				self::addFolder( $a, $s );
-			elseif( is_file( $s ) )
-				$a->addFile( $s, substr( $s, strlen( dirname( $s ) ) + 1 ) );
+		file_put_contents("debug.ifm.log", var_export(is_callable($exclude_callback), true)."\n");
+
+		foreach ($src as $s)
+			if (is_dir($s))
+				if (is_callable($exclude_callback))
+					self::addFolder( $a, $s, null, $exclude_callback );
+				else
+					self::addFolder( $a, $s );
+			elseif (is_file($s))
+				if (!is_callable($exclude_callback) || $exclude_callback($s))
+					$a->addFile($s, substr($s, strlen(dirname($s)) + 1));
 
 		try {
 			return $a->close();
-		} catch ( Exception $e ) {
+		} catch (Exception $e) {
 			return false;
 		}
 	}
@@ -4485,13 +4494,13 @@ class IFMArchive {
 	/**
 	 * Unzip a zip file
 	 */
-	public static function extractZip( $file, $destination="./" ) {
-		if( ! file_exists( $file ) )
+	public static function extractZip($file, $destination="./") {
+		if (!file_exists($file))
 			return false;
 		$zip = new ZipArchive;
-		$res = $zip->open( $file );
-		if( $res === true ) {
-			$zip->extractTo( $destination );
+		$res = $zip->open($file);
+		if ($res === true) {
+			$zip->extractTo($destination);
 			$zip->close();
 			return true;
 		} else
@@ -4501,32 +4510,32 @@ class IFMArchive {
 	/**
 	 * Creates a tar archive
 	 */
-	public static function createTar( $src, $out, $t ) {
-		$tmpf = substr( $out, 0, strlen( $out ) - strlen( $t ) ) . "tar";
-		$a = new PharData( $tmpf );
+	public static function createTar($src, $out, $t) {
+		$tmpf = substr($out, 0, strlen($out) - strlen($t)) . "tar";
+		$a = new PharData($tmpf);
 
 		try { 
-			if( ! is_array( $src ) )
-				$src = array( $src );
+			if (!is_array($src))
+				$src = array($src);
 
-			foreach( $src as $s )
-				if( is_dir( $s ) )
-					self::addFolder( $a, $s );
-				elseif( is_file( $s ) )
-					$a->addFile( $s, substr( $s, strlen( dirname( $s ) ) +1 ) ); 
-			switch( $t ) {
+			foreach ($src as $s)
+				if (is_dir($s))
+					self::addFolder($a, $s);
+				elseif (is_file($s))
+					$a->addFile($s, substr($s, strlen(dirname($s)) +1)); 
+			switch ($t) {
 			case "tar.gz":
-				$a->compress( Phar::GZ );
-				@unlink( $tmpf );
+				$a->compress(Phar::GZ);
+				@unlink($tmpf);
 				break;
 			case "tar.bz2":
-				$a->compress( Phar::BZ2 );
-				@unlink( $tmpf );
+				$a->compress(Phar::BZ2);
+				@unlink($tmpf);
 				break;
 			}
 			return true;
-		} catch( Exception $e ) {
-			@unlink( $tmpf );
+		} catch (Exception $e) {
+			@unlink($tmpf);
 			return false;
 		}
 	}
@@ -4534,14 +4543,14 @@ class IFMArchive {
 	/**
 	 * Extracts a tar archive
 	 */
-	public static function extractTar( $file, $destination="./" ) {
-		if( ! file_exists( $file ) )
+	public static function extractTar($file, $destination="./") {
+		if (!file_exists($file))
 			return false;
-		$tar = new PharData( $file );
+		$tar = new PharData($file);
 		try {
-			$tar->extractTo( $destination, null, true );
+			$tar->extractTo($destination, null, true);
 			return true;
-		} catch( Exception $e ) {
+		} catch (Exception $e) {
 			return false;
 		}
 	}
diff --git a/ifm.php b/ifm.php
index 46b5d8b..9ae7f9b 100644
--- a/ifm.php
+++ b/ifm.php
@@ -3905,13 +3905,13 @@ f00bar;
 				$this->jsonResponse( array( "status" => "ERROR", "message" => $this->l['folder_not_found'] ) );
 			elseif (!$this->isPathValid($d['filename']))
 				$this->jsonResponse( array( "status" => "ERROR", "message" => $this->l['invalid_dir'] ) );
-			elseif (!$this->isFilenameValid($d['filename']))
+			elseif ($d['filename'] != "." && !$this->isFilenameValid($d['filename']))
 				$this->jsonResponse( array( "status" => "ERROR", "message" => $this->l['invalid_filename'] ) );
 			else {
 				unset( $zip );
 				$dfile = $this->pathCombine( __DIR__, $this->config['tmp_dir'], uniqid( "ifm-tmp-" ) . ".zip" ); // temporary filename
 				try {
-					IFMArchive::createZip( realpath( $d['filename'] ), $dfile );
+					IFMArchive::createZip(realpath($d['filename']), $dfile, array($this, 'isFilenameValid'));
 					if( $d['filename'] == "." ) {
 						if( getcwd() == $this->getScriptRoot() )
 							$d['filename'] = "root";
@@ -4340,7 +4340,7 @@ f00bar;
 	}
 
 	// check if filename is allowed
-	private function isFilenameValid( $f ) {
+	public function isFilenameValid( $f ) {
 		if( ! $this->isFilenameAllowed( $f ) )
 			return false;
 		if( strtoupper( substr( PHP_OS, 0, 3 ) ) == "WIN" ) {
@@ -4440,44 +4440,53 @@ class IFMArchive {
 	/**
 	 * Add a folder to an archive
 	 */
-	private static function addFolder( &$archive, $folder, $offset=0 ) {
-		if( $offset == 0 )
-			$offset = strlen( dirname( $folder ) ) + 1;
-		$archive->addEmptyDir( substr( $folder, $offset ) );
-		$handle = opendir( $folder );
-		while( false !== $f = readdir( $handle ) ) {
-			if( $f != '.' && $f != '..'  ) {
+	private static function addFolder(&$archive, $folder, $offset=0, $exclude_callback=null) {
+		if ($offset == 0)
+			$offset = strlen(dirname($folder)) + 1;
+		$archive->addEmptyDir(substr($folder, $offset));
+		$handle = opendir($folder);
+		while (false !== $f = readdir($handle)) {
+			if ($f != '.' && $f != '..') {
 				$filePath = $folder . '/' . $f;
-				if( file_exists( $filePath ) && is_readable( $filePath ) )
-					if( is_file( $filePath ) )
-						$archive->addFile( $filePath, substr( $filePath, $offset ) );
-					elseif( is_dir( $filePath ) )
-						self::addFolder( $archive, $filePath, $offset );
+				if (file_exists($filePath) && is_readable($filePath))
+					if (is_file($filePath))
+						if (!is_callable($exclude_callback) || $exclude_callback($f))
+							$archive->addFile( $filePath, substr( $filePath, $offset ) );
+					elseif (is_dir($filePath))
+						if (is_callable($exclude_callback))
+							self::addFolder($archive, $filePath, $offset, $exclude_callback);
+						else
+							self::addFolder($archive, $filePath, $offset);
 			}
 		}
-		closedir( $handle );
+		closedir($handle);
 	}
 
 	/**
 	 * Create a zip file
 	 */
-	public static function createZip( $src, $out )
-	{
+	public static function createZip($src, $out, $exclude_callback=null) {
 		$a = new ZipArchive();
-		$a->open( $out, ZIPARCHIVE::CREATE);
+		$a->open($out, ZIPARCHIVE::CREATE);
 
-		if( ! is_array( $src ) )
-			$src = array( $src );
+		if (!is_array($src))
+			$src = array($src);
 
-		foreach( $src as $s )
-			if( is_dir( $s ) )
-				self::addFolder( $a, $s );
-			elseif( is_file( $s ) )
-				$a->addFile( $s, substr( $s, strlen( dirname( $s ) ) + 1 ) );
+		file_put_contents("debug.ifm.log", var_export(is_callable($exclude_callback), true)."\n");
+
+		foreach ($src as $s)
+			if (is_dir($s))
+				if (is_callable($exclude_callback))
+					self::addFolder( $a, $s, null, $exclude_callback );
+				else
+					self::addFolder( $a, $s );
+			elseif (is_file($s))
+				if (!is_callable($exclude_callback) || $exclude_callback($s))
+					$a->addFile($s, substr($s, strlen(dirname($s)) + 1));
 
 		try {
 			return $a->close();
-		} catch ( Exception $e ) {
+		} catch (Exception $e) {
 			return false;
 		}
 	}
@@ -4485,13 +4494,13 @@ class IFMArchive {
 	/**
 	 * Unzip a zip file
 	 */
-	public static function extractZip( $file, $destination="./" ) {
-		if( ! file_exists( $file ) )
+	public static function extractZip($file, $destination="./") {
+		if (!file_exists($file))
 			return false;
 		$zip = new ZipArchive;
-		$res = $zip->open( $file );
-		if( $res === true ) {
-			$zip->extractTo( $destination );
+		$res = $zip->open($file);
+		if ($res === true) {
+			$zip->extractTo($destination);
 			$zip->close();
 			return true;
 		} else
@@ -4501,32 +4510,32 @@ class IFMArchive {
 	/**
 	 * Creates a tar archive
 	 */
-	public static function createTar( $src, $out, $t ) {
-		$tmpf = substr( $out, 0, strlen( $out ) - strlen( $t ) ) . "tar";
-		$a = new PharData( $tmpf );
+	public static function createTar($src, $out, $t) {
+		$tmpf = substr($out, 0, strlen($out) - strlen($t)) . "tar";
+		$a = new PharData($tmpf);
 
 		try { 
-			if( ! is_array( $src ) )
-				$src = array( $src );
+			if (!is_array($src))
+				$src = array($src);
 
-			foreach( $src as $s )
-				if( is_dir( $s ) )
-					self::addFolder( $a, $s );
-				elseif( is_file( $s ) )
-					$a->addFile( $s, substr( $s, strlen( dirname( $s ) ) +1 ) ); 
-			switch( $t ) {
+			foreach ($src as $s)
+				if (is_dir($s))
+					self::addFolder($a, $s);
+				elseif (is_file($s))
+					$a->addFile($s, substr($s, strlen(dirname($s)) +1)); 
+			switch ($t) {
 			case "tar.gz":
-				$a->compress( Phar::GZ );
-				@unlink( $tmpf );
+				$a->compress(Phar::GZ);
+				@unlink($tmpf);
 				break;
 			case "tar.bz2":
-				$a->compress( Phar::BZ2 );
-				@unlink( $tmpf );
+				$a->compress(Phar::BZ2);
+				@unlink($tmpf);
 				break;
 			}
 			return true;
-		} catch( Exception $e ) {
-			@unlink( $tmpf );
+		} catch (Exception $e) {
+			@unlink($tmpf);
 			return false;
 		}
 	}
@@ -4534,14 +4543,14 @@ class IFMArchive {
 	/**
 	 * Extracts a tar archive
 	 */
-	public static function extractTar( $file, $destination="./" ) {
-		if( ! file_exists( $file ) )
+	public static function extractTar($file, $destination="./") {
+		if (!file_exists($file))
 			return false;
-		$tar = new PharData( $file );
+		$tar = new PharData($file);
 		try {
-			$tar->extractTo( $destination, null, true );
+			$tar->extractTo($destination, null, true);
 			return true;
-		} catch( Exception $e ) {
+		} catch (Exception $e) {
 			return false;
 		}
 	}
diff --git a/src/ifmarchive.php b/src/ifmarchive.php
index b19d448..2140606 100644
--- a/src/ifmarchive.php
+++ b/src/ifmarchive.php
@@ -23,44 +23,53 @@ class IFMArchive {
 	/**
 	 * Add a folder to an archive
 	 */
-	private static function addFolder( &$archive, $folder, $offset=0 ) {
-		if( $offset == 0 )
-			$offset = strlen( dirname( $folder ) ) + 1;
-		$archive->addEmptyDir( substr( $folder, $offset ) );
-		$handle = opendir( $folder );
-		while( false !== $f = readdir( $handle ) ) {
-			if( $f != '.' && $f != '..'  ) {
+	private static function addFolder(&$archive, $folder, $offset=0, $exclude_callback=null) {
+		if ($offset == 0)
+			$offset = strlen(dirname($folder)) + 1;
+		$archive->addEmptyDir(substr($folder, $offset));
+		$handle = opendir($folder);
+		while (false !== $f = readdir($handle)) {
+			if ($f != '.' && $f != '..') {
 				$filePath = $folder . '/' . $f;
-				if( file_exists( $filePath ) && is_readable( $filePath ) )
-					if( is_file( $filePath ) )
-						$archive->addFile( $filePath, substr( $filePath, $offset ) );
-					elseif( is_dir( $filePath ) )
-						self::addFolder( $archive, $filePath, $offset );
+				if (file_exists($filePath) && is_readable($filePath))
+					if (is_file($filePath))
+						if (!is_callable($exclude_callback) || $exclude_callback($f))
+							$archive->addFile( $filePath, substr( $filePath, $offset ) );
+					elseif (is_dir($filePath))
+						if (is_callable($exclude_callback))
+							self::addFolder($archive, $filePath, $offset, $exclude_callback);
+						else
+							self::addFolder($archive, $filePath, $offset);
 			}
 		}
-		closedir( $handle );
+		closedir($handle);
 	}
 
 	/**
 	 * Create a zip file
 	 */
-	public static function createZip( $src, $out )
-	{
+	public static function createZip($src, $out, $exclude_callback=null) {
 		$a = new ZipArchive();
-		$a->open( $out, ZIPARCHIVE::CREATE);
+		$a->open($out, ZIPARCHIVE::CREATE);
 
-		if( ! is_array( $src ) )
-			$src = array( $src );
+		if (!is_array($src))
+			$src = array($src);
 
-		foreach( $src as $s )
-			if( is_dir( $s ) )
-				self::addFolder( $a, $s );
-			elseif( is_file( $s ) )
-				$a->addFile( $s, substr( $s, strlen( dirname( $s ) ) + 1 ) );
+		file_put_contents("debug.ifm.log", var_export(is_callable($exclude_callback), true)."\n");
+
+		foreach ($src as $s)
+			if (is_dir($s))
+				if (is_callable($exclude_callback))
+					self::addFolder( $a, $s, null, $exclude_callback );
+				else
+					self::addFolder( $a, $s );
+			elseif (is_file($s))
+				if (!is_callable($exclude_callback) || $exclude_callback($s))
+					$a->addFile($s, substr($s, strlen(dirname($s)) + 1));
 
 		try {
 			return $a->close();
-		} catch ( Exception $e ) {
+		} catch (Exception $e) {
 			return false;
 		}
 	}
@@ -68,13 +77,13 @@ class IFMArchive {
 	/**
 	 * Unzip a zip file
 	 */
-	public static function extractZip( $file, $destination="./" ) {
-		if( ! file_exists( $file ) )
+	public static function extractZip($file, $destination="./") {
+		if (!file_exists($file))
 			return false;
 		$zip = new ZipArchive;
-		$res = $zip->open( $file );
-		if( $res === true ) {
-			$zip->extractTo( $destination );
+		$res = $zip->open($file);
+		if ($res === true) {
+			$zip->extractTo($destination);
 			$zip->close();
 			return true;
 		} else
@@ -84,32 +93,32 @@ class IFMArchive {
 	/**
 	 * Creates a tar archive
 	 */
-	public static function createTar( $src, $out, $t ) {
-		$tmpf = substr( $out, 0, strlen( $out ) - strlen( $t ) ) . "tar";
-		$a = new PharData( $tmpf );
+	public static function createTar($src, $out, $t) {
+		$tmpf = substr($out, 0, strlen($out) - strlen($t)) . "tar";
+		$a = new PharData($tmpf);
 
 		try { 
-			if( ! is_array( $src ) )
-				$src = array( $src );
+			if (!is_array($src))
+				$src = array($src);
 
-			foreach( $src as $s )
-				if( is_dir( $s ) )
-					self::addFolder( $a, $s );
-				elseif( is_file( $s ) )
-					$a->addFile( $s, substr( $s, strlen( dirname( $s ) ) +1 ) ); 
-			switch( $t ) {
+			foreach ($src as $s)
+				if (is_dir($s))
+					self::addFolder($a, $s);
+				elseif (is_file($s))
+					$a->addFile($s, substr($s, strlen(dirname($s)) +1)); 
+			switch ($t) {
 			case "tar.gz":
-				$a->compress( Phar::GZ );
-				@unlink( $tmpf );
+				$a->compress(Phar::GZ);
+				@unlink($tmpf);
 				break;
 			case "tar.bz2":
-				$a->compress( Phar::BZ2 );
-				@unlink( $tmpf );
+				$a->compress(Phar::BZ2);
+				@unlink($tmpf);
 				break;
 			}
 			return true;
-		} catch( Exception $e ) {
-			@unlink( $tmpf );
+		} catch (Exception $e) {
+			@unlink($tmpf);
 			return false;
 		}
 	}
@@ -117,14 +126,14 @@ class IFMArchive {
 	/**
 	 * Extracts a tar archive
 	 */
-	public static function extractTar( $file, $destination="./" ) {
-		if( ! file_exists( $file ) )
+	public static function extractTar($file, $destination="./") {
+		if (!file_exists($file))
 			return false;
-		$tar = new PharData( $file );
+		$tar = new PharData($file);
 		try {
-			$tar->extractTo( $destination, null, true );
+			$tar->extractTo($destination, null, true);
 			return true;
-		} catch( Exception $e ) {
+		} catch (Exception $e) {
 			return false;
 		}
 	}
diff --git a/src/main.php b/src/main.php
index 6fdd182..47c227b 100644
--- a/src/main.php
+++ b/src/main.php
@@ -829,13 +829,13 @@ f00bar;
 				$this->jsonResponse( array( "status" => "ERROR", "message" => $this->l['folder_not_found'] ) );
 			elseif (!$this->isPathValid($d['filename']))
 				$this->jsonResponse( array( "status" => "ERROR", "message" => $this->l['invalid_dir'] ) );
-			elseif (!$this->isFilenameValid($d['filename']))
+			elseif ($d['filename'] != "." && !$this->isFilenameValid($d['filename']))
 				$this->jsonResponse( array( "status" => "ERROR", "message" => $this->l['invalid_filename'] ) );
 			else {
 				unset( $zip );
 				$dfile = $this->pathCombine( __DIR__, $this->config['tmp_dir'], uniqid( "ifm-tmp-" ) . ".zip" ); // temporary filename
 				try {
-					IFMArchive::createZip( realpath( $d['filename'] ), $dfile );
+					IFMArchive::createZip(realpath($d['filename']), $dfile, array($this, 'isFilenameValid'));
 					if( $d['filename'] == "." ) {
 						if( getcwd() == $this->getScriptRoot() )
 							$d['filename'] = "root";
@@ -1264,7 +1264,7 @@ f00bar;
 	}
 
 	// check if filename is allowed
-	private function isFilenameValid( $f ) {
+	public function isFilenameValid( $f ) {
 		if( ! $this->isFilenameAllowed( $f ) )
 			return false;
 		if( strtoupper( substr( PHP_OS, 0, 3 ) ) == "WIN" ) {