我正在努力使这个短代码起作用，但没有任何成功。所有的尝试都给了我一个白色的方块。

  function youtube($atts) {
    extract(shortcode_atts(array(
    "value" => \'https://www.youtube.com/watch?v=EhWopzlRwZ8\',
    "width" => \'475\',
    "height" => \'350\',
    "name"=> \'movie\',
    "allowFullScreen" => \'true\',
    "allowScriptAccess"=>\'always\',
    ), $atts));
    return \'<object style="height: \'.$height.\'px; width: \'.$width.\'px"><param name="\'.$name.\'" value="\'.$value.\'"><param name="allowFullScreen" value="\'.$allowFullScreen.\'"></param><param name="allowScriptAccess" value="\'.$allowScriptAccess.\'"></param><embed src="\'.$value.\'" type="application/x-shockwave-flash" allowfullscreen="\'.$allowFullScreen.\'" allowScriptAccess="\'.$allowScriptAccess.\'" width="\'.$width.\'" height="\'.$height.\'"></embed></object>\';
    }
    add_shortcode("youtube", "youtube");