diff --git a/php/editors/OnlineConvert/editor.php b/php/editors/OnlineConvert/editor.php
index b4808c408..f1f3f6ef2 100644
--- a/php/editors/OnlineConvert/editor.php
+++ b/php/editors/OnlineConvert/editor.php
@@ -96,6 +96,7 @@ class elFinderEditorOnlineConvert extends elFinderEditor
             } else {
                 $data = json_decode($response, true);
                 if (isset($data['status']) && isset($data['status']['code']) && $data['status']['code'] === 'completed') {
+                    /** @var elFinderSession $session */
                     $session = $this->elfinder->getSession();
                     $urlContentSaveIds = $session->get('urlContentSaveIds', array());
                     $urlContentSaveIds['OnlineConvert-' . $data['id']] = true;
diff --git a/php/editors/ZohoOffice/editor.php b/php/editors/ZohoOffice/editor.php
index 2dec97757..3bf553713 100644
--- a/php/editors/ZohoOffice/editor.php
+++ b/php/editors/ZohoOffice/editor.php
@@ -45,6 +45,7 @@ class elFinderEditorZohoOffice extends elFinderEditor
         if (!empty($this->args['target'])) {
             $fp = $cfile = null;
             $hash = $this->args['target'];
+            /** @var elFinderVolumeDriver $srcVol */
             if (($srcVol = $this->elfinder->getVolume($hash)) && ($file = $srcVol->file($hash))) {
                 $cdata = empty($this->args['cdata']) ? '' : $this->args['cdata'];
                 $cookie = $this->elfinder->getFetchCookieFile();
@@ -148,6 +149,7 @@ class elFinderEditorZohoOffice extends elFinderEditor
     {
         if (isset($_POST) && !empty($_POST['id'])) {
             $hash = $_POST['id'];
+            /** @var elFinderVolumeDriver $volume */
             if ($volume = $this->elfinder->getVolume($hash)) {
                 $content = file_get_contents($_FILES['content']['tmp_name']);
                 if ($volume->putContents($hash, $content)) {
@@ -162,6 +164,7 @@ class elFinderEditorZohoOffice extends elFinderEditor
     {
         $hash = $this->args['target'];
         $res = false;
+        /** @var elFinderVolumeDriver $volume */
         if ($volume = $this->elfinder->getVolume($hash)) {
             if ($file = $volume->file($hash)) {
                 $res = (bool)$file['write'];
diff --git a/php/elFinderVolumeDriver.class.php b/php/elFinderVolumeDriver.class.php
index 0247d405c..505acc1bf 100644
--- a/php/elFinderVolumeDriver.class.php
+++ b/php/elFinderVolumeDriver.class.php
@@ -5639,6 +5639,16 @@ abstract class elFinderVolumeDriver
 
             case 'convert':
                 extract($this->imageMagickConvertPrepare($path, $destformat, $jpgQuality, $s));
+                /**
+                 * @var string $ani
+                 * @var string $index
+                 * @var string $coalesce
+                 * @var string $deconstruct
+                 * @var string $jpgQuality
+                 * @var string $quotedPath
+                 * @var string $quotedDstPath
+                 * @var string $interlace
+                 */
                 $filter = ($destformat === 'png' /* createTmb */) ? '-filter Box' : '-filter Lanczos';
                 $strip = (isset($options['preserveExif']) && !$options['preserveExif']) ? ' -strip' : '';
                 $cmd = sprintf('%s %s%s%s%s%s %s -geometry %dx%d! %s %s', ELFINDER_CONVERT_PATH, $quotedPath, $coalesce, $jpgQuality, $strip, $interlace, $filter, $size_w, $size_h, $deconstruct, $quotedDstPath);
@@ -5753,6 +5763,16 @@ abstract class elFinderVolumeDriver
 
             case 'convert':
                 extract($this->imageMagickConvertPrepare($path, $destformat, $jpgQuality, $s));
+                /**
+                 * @var string $ani
+                 * @var string $index
+                 * @var string $coalesce
+                 * @var string $deconstruct
+                 * @var string $jpgQuality
+                 * @var string $quotedPath
+                 * @var string $quotedDstPath
+                 * @var string $interlace
+                 */
                 $cmd = sprintf('%s %s%s%s%s -crop %dx%d+%d+%d%s %s', ELFINDER_CONVERT_PATH, $quotedPath, $coalesce, $jpgQuality, $interlace, $width, $height, $x, $y, $deconstruct, $quotedDstPath);
 
                 $result = false;
@@ -5892,6 +5912,16 @@ abstract class elFinderVolumeDriver
 
             case 'convert':
                 extract($this->imageMagickConvertPrepare($path, $destformat, $jpgQuality, $s));
+                /**
+                 * @var string $ani
+                 * @var string $index
+                 * @var string $coalesce
+                 * @var string $deconstruct
+                 * @var string $jpgQuality
+                 * @var string $quotedPath
+                 * @var string $quotedDstPath
+                 * @var string $interlace
+                 */
                 if ($bgcolor === 'transparent') {
                     $bgcolor = 'rgba(255, 255, 255, 0.0)';
                 }
@@ -6022,6 +6052,16 @@ abstract class elFinderVolumeDriver
 
             case 'convert':
                 extract($this->imageMagickConvertPrepare($path, $destformat, $jpgQuality, $s));
+                /**
+                 * @var string $ani
+                 * @var string $index
+                 * @var string $coalesce
+                 * @var string $deconstruct
+                 * @var string $jpgQuality
+                 * @var string $quotedPath
+                 * @var string $quotedDstPath
+                 * @var string $interlace
+                 */
                 if ($s[2] === IMAGETYPE_GIF || $s[2] === IMAGETYPE_PNG) {
                     $bgcolor = 'rgba(255, 255, 255, 0.0)';
                 }
diff --git a/php/elFinderVolumeFTP.class.php b/php/elFinderVolumeFTP.class.php
index 6dcdb6d39..1603a99f8 100644
--- a/php/elFinderVolumeFTP.class.php
+++ b/php/elFinderVolumeFTP.class.php
@@ -501,7 +501,7 @@ class elFinderVolumeFTP extends elFinderVolumeDriver
      *                                             If the owner parameter is false to understand if the user is the file owner we compare the ftp user with the file owner id.
      * @param Boolean $isowner                     . Tell if the current user is the owner of the object.
      *
-     * @return string
+     * @return array
      * @author Dmitry (dio) Levashov
      * @author Ugo Vierucci
      */
diff --git a/php/libs/GdBmp.php b/php/libs/GdBmp.php
index c1acbcde7..0b51f3879 100644
--- a/php/libs/GdBmp.php
+++ b/php/libs/GdBmp.php
@@ -198,6 +198,18 @@ class elFinderLibGdBmp
                 "Vclr_used/" .
                 "Vclr_important", $buf
             ));
+            /**
+             * @var integer $width
+             * @var integer $height
+             * @var integer $planes
+             * @var integer $bit_count
+             * @var integer $compression
+             * @var integer $size_image
+             * @var integer $x_pels_per_meter
+             * @var integer $y_pels_per_meter
+             * @var integer $clr_used
+             * @var integer $clr_important
+             */
             //負の整数を受け取る可能性があるものは自前で変換する
             if ($width & 0x80000000) {
                 $width = -(~$width & 0xffffffff) - 1;
@@ -317,6 +329,12 @@ class elFinderLibGdBmp
                     return false;
                 }
                 extract(unpack("Cb/Cg/Cr/Cx", $buf . "\x00"));
+                /**
+                 * @var integer $b
+                 * @var integer $g
+                 * @var integer $r
+                 * @var integer $x
+                 */
                 $palette[] = imagecolorallocate($img, $r, $g, $b);
             }