Jarves\Filesystem\Filesystem::getThumbnail PHP Method

    public function getThumbnail($path, $resolution, $resize = false)
    {
        $content = $this->read($path);
        $image = imagecreatefromstring($content);
        list($newWidth, $newHeight) = explode('x', $resolution);
        $thumbWidth = $newWidth;
        $thumbHeight = $newHeight;
        $oriWidth = imagesx($image);
        $oriHeight = imagesy($image);
        $thumbImage = imagecreatetruecolor($thumbWidth, $thumbHeight);
        imagealphablending($thumbImage, false);
        imagealphablending($image, false);
        imagesavealpha($image, true);
        if (!$resize && $thumbWidth >= $oriWidth && $thumbHeight > $oriHeight) {
            return $image;
        }
        if ($oriWidth > $oriHeight) {
            $ratio = $thumbHeight / ($oriHeight / 100);
            $_width = ceil($oriWidth * $ratio / 100);
            //            $top = 0;
            if ($_width < $thumbWidth) {
                //                $ratio = $_width / ($thumbWidth / 100);
                //                $nHeight = $thumbHeight * $ratio / 100;
                //                $top = ($thumbHeight - $nHeight) / 2;
                $_width = $thumbWidth;
            }
            $tempImg = imagecreatetruecolor($_width, $thumbHeight);
            imagealphablending($tempImg, false);
            imagecopyresampled($tempImg, $image, 0, 0, 0, 0, $_width, $thumbHeight, $oriWidth, $oriHeight);
            $_left = $_width / 2 - $thumbWidth / 2;
            imagecopyresampled($thumbImage, $tempImg, 0, 0, $_left, 0, $thumbWidth, $thumbHeight, $thumbWidth, $thumbHeight);
        } else {
            $ratio = $thumbWidth / ($oriWidth / 100);
            $_height = ceil($oriHeight * $ratio / 100);
            $tempImg = imagecreatetruecolor($thumbWidth, $_height);
            imagealphablending($tempImg, false);
            imagecopyresampled($tempImg, $image, 0, 0, 0, 0, $thumbWidth, $_height, $oriWidth, $oriHeight);
            $_top = $_height / 2 - $thumbHeight / 2;
            imagecopyresampled($thumbImage, $tempImg, 0, 0, 0, $_top, $thumbWidth, $thumbHeight, $thumbWidth, $thumbHeight);
        }
        imagealphablending($thumbImage, false);
        imagesavealpha($thumbImage, true);
        return $thumbImage;
    }