WordPress文章中怎么自动获取网站截图

function wp_screenshot($atts, $content=null){
extract(
shortcode_atts(
array(
"shots" => "https://s0.wordpress.com/mshots/v1/",
"url" => "https:// .wpbeginner.com",
"width" => "600",
"height" => "450",
"alt" => "screenshot"
), 
$atts
)
);
 
$img = '<div class="wp-shot"><a href="' . $url . '" rel="external nofollow" target="_blank"><img src="' . $shots . '' . urlencode($url) . '?w=' . $width . '&h=' . $height . '" alt="' . $alt . '"  /></a></div>';
return $img;
}
add_shortcode("shot", "wp_screenshot");

[shot url="http://ebingou.cn/"]

[shot url="http://ebingou.cn/" width="600" height="450"]