diff --git a/lib/i18n.php b/lib/i18n.php
index c788f2ea..0195f975 100644
--- a/lib/i18n.php
+++ b/lib/i18n.php
@@ -306,7 +306,7 @@ class i18n
             case 'zh':
                 return ($n > 1 ? 1 : 0);
             case 'pl':
-                return ($n == 1 ? 0 : $n%10 >= 2 && $n %10 <=4 && ($n%100 < 10 || $n%100 >= 20) ? 1 : 2);
+                return ($n == 1 ? 0 : $n % 10 >= 2 && $n % 10 <= 4 && ($n % 100 < 10 || $n % 100 >= 20) ? 1 : 2);
             // en, de
             default:
                 return ($n != 1 ? 1 : 0);
@@ -386,7 +386,7 @@ class i18n
     protected static function _matchLanguage($a, $b) {
         $a = explode('-', $a);
         $b = explode('-', $b);
-        for ($i=0, $n=min(count($a), count($b)); $i<$n; $i++)
+        for ($i=0, $n = min(count($a), count($b)); $i < $n; ++$i)
         {
             if ($a[$i] !== $b[$i]) break;
         }
diff --git a/lib/persistence.php b/lib/persistence.php
index 9dcc59dc..675891a5 100644
--- a/lib/persistence.php
+++ b/lib/persistence.php
@@ -45,13 +45,16 @@ abstract class persistence
      * @access public
      * @static
      * @param  string $filename
-     * @return void
+     * @return string
      */
     public static function getPath($filename = null)
     {
-        if(strlen($filename)) {
+        if (strlen($filename))
+        {
             return self::$_path . DIRECTORY_SEPARATOR . $filename;
-        } else {
+        }
+        else
+        {
             return self::$_path;
         }
     }
@@ -92,7 +95,7 @@ abstract class persistence
             $writtenBytes = @file_put_contents(
                 $file,
                 'Allow from none' . PHP_EOL .
-                'Deny from all'. PHP_EOL,
+                'Deny from all' . PHP_EOL,
                 LOCK_EX
             );
             if ($writtenBytes === false || $writtenBytes < 30) {
@@ -116,7 +119,8 @@ abstract class persistence
         self::_initialize();
         $file = self::$_path . DIRECTORY_SEPARATOR . $filename;
         $writtenBytes = @file_put_contents($file, $data, LOCK_EX);
-        if ($writtenBytes === false || $writtenBytes < strlen($data)) {
+        if ($writtenBytes === false || $writtenBytes < strlen($data))
+        {
             throw new Exception('unable to write to file ' . $file, 13);
         }
         @chmod($file, 0640); // protect file access
diff --git a/lib/privatebin/data.php b/lib/privatebin/data.php
index 285c538d..90503953 100644
--- a/lib/privatebin/data.php
+++ b/lib/privatebin/data.php
@@ -42,7 +42,7 @@ class privatebin_data extends privatebin_abstract
             array_key_exists('dir', $options)
         ) self::$_dir = $options['dir'] . DIRECTORY_SEPARATOR;
         // if needed initialize the singleton
-        if(!(self::$_instance instanceof privatebin_data)) {
+        if (!(self::$_instance instanceof privatebin_data)) {
             self::$_instance = new self;
             self::_init();
         }
@@ -74,7 +74,7 @@ class privatebin_data extends privatebin_abstract
      */
     public function read($pasteid)
     {
-        if(!$this->exists($pasteid)) return false;
+        if (!$this->exists($pasteid)) return false;
         $paste = json_decode(
             file_get_contents(self::_dataid2path($pasteid) . $pasteid)
         );
@@ -111,7 +111,7 @@ class privatebin_data extends privatebin_abstract
             $dir = dir($discdir);
             while (false !== ($filename = $dir->read()))
             {
-                if (is_file($discdir.$filename)) @unlink($discdir.$filename);
+                if (is_file($discdir . $filename)) @unlink($discdir . $filename);
             }
             $dir->close();
 
@@ -289,7 +289,7 @@ class privatebin_data extends privatebin_abstract
             file_put_contents(
                 self::$_dir . '.htaccess',
                 'Allow from none' . PHP_EOL .
-                'Deny from all'. PHP_EOL
+                'Deny from all' . PHP_EOL
             );
         }
     }
@@ -311,8 +311,8 @@ class privatebin_data extends privatebin_abstract
      */
     private static function _dataid2path($dataid)
     {
-        return self::$_dir . substr($dataid,0,2) . DIRECTORY_SEPARATOR .
-            substr($dataid,2,2) . DIRECTORY_SEPARATOR;
+        return self::$_dir . substr($dataid, 0, 2) . DIRECTORY_SEPARATOR .
+            substr($dataid, 2, 2) . DIRECTORY_SEPARATOR;
     }
 
     /**
diff --git a/lib/trafficlimiter.php b/lib/trafficlimiter.php
index 55e040f2..bd6f4fed 100644
--- a/lib/trafficlimiter.php
+++ b/lib/trafficlimiter.php
@@ -115,7 +115,7 @@ class trafficlimiter extends persistence
         $tl = $GLOBALS['traffic_limiter'];
 
         // purge file of expired IPs to keep it small
-        foreach($tl as $key => $time)
+        foreach ($tl as $key => $time)
         {
             if ($time + self::$_limit < $now)
             {