Identicon\Generator\GdGenerator::getImageBinaryData PHP Метод

    public function getImageBinaryData($string, $size = null, $color = null, $backgroundColor = null)
    {
        ob_start();
        imagepng($this->getImageResource($string, $size, $color, $backgroundColor));
        $imageData = ob_get_contents();
        ob_end_clean();
        return $imageData;
    }