ArticleImage::getImage PHP Method

    public function getImage()
    {
        if (is_object($this->m_image)) {
            return $this->m_image;
        } else {
            return new Image($this->m_data['IdImage']);
        }
    }

 function getImageByNumber($articleId, $imageNumber)
 {
     $articleImage = new ArticleImage($articleId, null, $imageNumber);
     $image = $articleImage->getImage();
     return $image;
 }