diff --git a/Admin/Install/Navigation.php b/Admin/Install/Navigation.php
index 7af113f..0d189df 100644
--- a/Admin/Install/Navigation.php
+++ b/Admin/Install/Navigation.php
@@ -38,7 +38,7 @@ class Navigation
      */
     public static function install(string $path = null, DatabasePool $dbPool = null) : void
     {
-        $navData = json_decode(file_get_contents(__DIR__ . '/Navigation.install.json'), true);
+        $navData = \json_decode(file_get_contents(__DIR__ . '/Navigation.install.json'), true);
 
         $class = '\\Modules\\Navigation\\Admin\\Installer';
         /** @var $class \Modules\Navigation\Admin\Installer */
diff --git a/Controller.php b/Controller.php
index 6231521..1ef877c 100644
--- a/Controller.php
+++ b/Controller.php
@@ -297,8 +297,8 @@ final class Controller extends ModuleAbstract implements WebInterface
 
     private static function normalizeDbPath(string $path) : string
     {
-        return str_replace('\\', '/',
-            str_replace(realpath(__DIR__ . '/../../'), '',
+        return \str_replace('\\', '/',
+            \str_replace(realpath(__DIR__ . '/../../'), '',
                 rtrim($path, '/')
             )
         );
diff --git a/Models/Media.php b/Models/Media.php
index 76b6634..3890382 100644
--- a/Models/Media.php
+++ b/Models/Media.php
@@ -269,7 +269,7 @@ class Media
      */
     public function setPath(string $path)
     {
-        $this->path = str_replace('\\', '/', $path);
+        $this->path = \str_replace('\\', '/', $path);
     }
 
     /**
diff --git a/Models/MediaMapper.php b/Models/MediaMapper.php
index d528db3..45935ef 100644
--- a/Models/MediaMapper.php
+++ b/Models/MediaMapper.php
@@ -26,7 +26,7 @@ class MediaMapper extends DataMapperAbstract
     /**
      * Columns.
      *
-     * @var array
+     * @var array<string, array<string, string>>
      * @since 1.0.0
      */
     protected static $columns = [
diff --git a/Models/UploadFile.php b/Models/UploadFile.php
index 4d7344f..733acb6 100644
--- a/Models/UploadFile.php
+++ b/Models/UploadFile.php
@@ -48,7 +48,7 @@ class UploadFile
     /**
      * Allowed mime types.
      *
-     * @var array
+     * @var string[]
      * @since 1.0.0
      */
     private $allowedTypes = [];
@@ -135,14 +135,14 @@ class UploadFile
                 $this->fileName = $f['name'];
             }
 
-            $split                     = explode('.', $f['name']);
+            $split                     = \explode('.', $f['name']);
             $result[$key]['name']      = $split[0];
             $extension                 = count($split) > 1 ? $split[count($split) - 1] : '';
             $result[$key]['extension'] = $extension;
 
             // ! and empty same?!
             $result[$key]['filename'] = $this->fileName;
-            if (!$this->fileName || empty($this->fileName) || file_exists($path . '/' . $this->fileName)) {
+            if (!$this->fileName || empty($this->fileName) || \file_exists($path . '/' . $this->fileName)) {
                 $rnd = '';
 
                 $limit = 0;
@@ -183,7 +183,7 @@ class UploadFile
                 return $result;
             }
 
-            if ($this->interlaced && in_array($extension, ['png', 'jpg', 'jpeg', 'gif'])) {
+            if ($this->interlaced && \in_array($extension, ['png', 'jpg', 'jpeg', 'gif'])) {
                 $this->interlace($extension, $dest);
             }
 
@@ -276,7 +276,7 @@ class UploadFile
     }
 
     /**
-     * @param int $maxSize
+     * @param int $maxSize Max allowed file size
      *
      * @return void
      *
@@ -288,7 +288,7 @@ class UploadFile
     }
 
     /**
-     * @return array
+     * @return string[]
      *
      * @since  1.0.0
      */
@@ -298,7 +298,7 @@ class UploadFile
     }
 
     /**
-     * @param array $allowedTypes
+     * @param string[] $allowedTypes Allowed file types
      *
      * @return void
      *
@@ -310,7 +310,7 @@ class UploadFile
     }
 
     /**
-     * @param array $allowedTypes
+     * @param string[] $allowedTypes Allowed file types
      *
      * @return void
      *
@@ -332,7 +332,9 @@ class UploadFile
     }
 
     /**
-     * @param string $outputDir
+     * Define output directory of the upload
+     * 
+     * @param string $outputDir Output directory of the uploaded file
      *
      * @return void
      *
@@ -354,7 +356,9 @@ class UploadFile
     }
 
     /**
-     * @param string $fileName
+     * Set the file name of the uploaded file
+     * 
+     * @param string $fileName File name of the uploaded file
      *
      * @return void
      *
@@ -366,7 +370,9 @@ class UploadFile
     }
 
     /**
-     * @param bool $preserveFileName
+     * Define if the uploaded file name should be the same file name as the original file
+     * 
+     * @param bool $preserveFileName Keep file name of the original file
      *
      * @return void
      *
diff --git a/Theme/Backend/media-single.tpl.php b/Theme/Backend/media-single.tpl.php
index 5c3658d..f0c5467 100644
--- a/Theme/Backend/media-single.tpl.php
+++ b/Theme/Backend/media-single.tpl.php
@@ -81,8 +81,8 @@ echo $this->getData('nav')->render();
                         <tr data-href="<?= $url; ?>">
                             <td><a href="<?= $url; ?>"><i class="fa fa-<?= $this->printHtml($icon); ?>"></i></a>
                             <td><a href="<?= $url; ?>"><?= substr($value, strlen($media->getPath())); ?></a>
-                            <td><a href="<?= $url; ?>"><?= !is_dir($value) ? File::extension($value) : 'collection'; ?></a>
-                            <td><a href="<?= $url; ?>"><?= !is_dir($value) ? File::size($value) : ''; ?></a>
+                            <td><a href="<?= $url; ?>"><?= !\is_dir($value) ? File::extension($value) : 'collection'; ?></a>
+                            <td><a href="<?= $url; ?>"><?= !\is_dir($value) ? File::size($value) : ''; ?></a>
                             <td><a href="<?= $url; ?>"><?= File::owner($value); ?></a>
                             <td><a href="<?= $url; ?>"><?= File::created($value)->format('Y-m-d'); ?></a>
                     <?php endforeach; endif; ?>
@@ -103,7 +103,7 @@ echo $this->getData('nav')->render();
                 <?php else : ?>
                     <button class="floatRight">Edit</button>
 
-                    <?php if (!file_exists($media->isAbsolute() ? $path : __DIR__ . '/../../../../' . $path)) : ?>
+                    <?php if (!\file_exists($media->isAbsolute() ? $path : __DIR__ . '/../../../../' . $path)) : ?>
                         <div class="centerText"><i class="fa fa-question fa-5x"></i></div>
                     <?php else : ?>
                     <pre>
diff --git a/Views/MediaView.php b/Views/MediaView.php
index 26eb0a6..31583ac 100644
--- a/Views/MediaView.php
+++ b/Views/MediaView.php
@@ -36,7 +36,7 @@ class MediaView extends View
     {
         if (is_file($media->getPath() . $sub)
             && StringUtils::startsWith(
-                str_replace('\\', '/', realpath($media->getPath() . $sub)),
+                \str_replace('\\', '/', realpath($media->getPath() . $sub)),
                 $media->getPath()
             )
         ) {
@@ -50,7 +50,7 @@ class MediaView extends View
     {
         if (is_dir($media->getPath() . $sub)
             && StringUtils::startsWith(
-                str_replace('\\', '/', realpath($media->getPath() . $sub)),
+                \str_replace('\\', '/', realpath($media->getPath() . $sub)),
                 $media->getPath()
             )
         ) {
@@ -65,14 +65,14 @@ class MediaView extends View
         return ($media->getExtension() === 'collection'
                 && !is_file($media->getPath() . $sub))
             || (is_dir($media->getPath())
-                && ($sub === null || is_dir($media->getPath() . $sub))
+                && ($sub === null || \is_dir($media->getPath() . $sub))
         );
     }
 
     protected function lineContentFunction(string $path) : array
     {
-        $output = file_get_contents($path);
-        $output = str_replace(["\r\n", "\r"], "\n", $output);
+        $output = \file_get_contents($path);
+        $output = \str_replace(["\r\n", "\r"], "\n", $output);
 
         return explode("\n", $output);
     }