aws s3 image watermark

 /**
     * File Upload into Amazon S3
     * @param string $input_name
     * @param int $restaurant_id
     * @return string/bolean
     */
    public function _fileUpload($input_name, $restaurant_id) {

        if (isset($_FILES[$input_name]) && ($_FILES[$input_name]) != null) {

            $file_details = $_FILES[$input_name]['name'];
            // current time and date 
            $filename = explode(".", $file_details);
            $picname = $filename[0];
            $file_type = $filename[1];

            $rand_string = random_string('alnum', 8);

            // AMAZON
            $file_new_name = date("YmdHis") . $restaurant_id . $rand_string . "." . $file_type;

            // THIS PART BY RIDDHIMAN ADIB
            require_once './aws/aws-autoloader.php';

            // Instantiate an Amazon S3 client.
            $s3 = new Aws\S3\S3Client([
                'version' => 'latest',
                'region' => 'ap-southeast-1',
                'credentials' => [
                    'key' => 'KEY',
                    'secret' => 'SECRET',
                ],
            ]);

            //
            // Load the image where the logo will be embeded into
            $image = imagecreatefromjpeg($_FILES[$input_name]["tmp_name"]);

            // Load the logo image
            $logoImage = imagecreatefrompng('https://s3-ap-southeast-1.amazonaws.com/harriken/restaurant-pic/2016/02/20160223150236101RzOq2BAM.png');
            imagealphablending($logoImage, true);

            // Get dimensions
            $imageWidth = imagesx($image);
            $imageHeight = imagesy($image);

            $logoWidth = imagesx($logoImage);
            $logoHeight = imagesy($logoImage);

            // Paste the logo
            imagecopy(
                    // destination
                    $image,
                    // source
                    $logoImage,
                    // destination x and y 
                    ($imageWidth - $logoWidth) / 2, ($imageHeight - $logoHeight) / 2,
                    // source x and y
                    0, 0,
                    // width and height of the area of the source to copy
                    $logoWidth, $logoHeight);

            //
            try {
                $result = $s3->putObject([
                    'Bucket' => $this->bucket_name,
                    'Key' => $this->upload_dir . date("Y") . '/' . date("m") . '/' . $file_new_name,
                    'Body' => $this->image_data($image), //'Body'   => fopen('/path/to/file', 'r'),
                    'ACL' => 'public-read'
                ]);
            } catch (Aws\Exception\S3Exception $e) {
                echo "There was an error uploading the file.\n";
            }

            // Release memory
            imageDestroy($image);
            imageDestroy($logoImage);

            if ($result['ObjectURL']) {
                return $file_new_name;
            } else {
                return NULL;
            }

            //
            //
            /*
              $response = $s3->deleteObject(array(
              'Bucket' => $this->bucket_name,
              'Key' => 'restaurant-pic/2016/02/20160223131538100OjJ4j25N.jpg'
              ));
              var_dump($response); exit();
             */
        }
    }

    function image_data($gdimage) {
        ob_start();
        imagejpeg($gdimage);
        return(ob_get_clean());
    }