I want know width and height from (images) Logo and Crest, current I use standard PHP function getimagesize in my theme

/**
 *  Get dimensions for image
 */
if (!function_exists('get_image_dimensions')) {
    function get_image_dimensions($url)
    {
        $size = getimagesize($url); 
        $width = $size[0];
        $height = $size[1];

        return array('width' => $width, 'height' => $height);
    }
}

Exist native function for it ?