默认情况下，WordPress会删除iFrame。这就是为什么你可以在编辑器中看到它，但当你试图在网站上保存/发布它时却看不到它。

尝试通过将其添加到主题函数中来启用iframes。php文件

    /**
     * Add iFrame to allowed wp_kses_post tags
     *
     * @param string $tags Allowed tags, attributes, and/or entities.
     * @param string $context Context to judge allowed tags by. Allowed values are \'post\',
     *
     * @return mixed
     */

add_filter( \'wp_kses_allowed_html\', \'allow_iframe_in_editor\', 10, 2 );
    
function allow_iframe_in_editor( $tags, $context ) {
        if( \'post\' === $context ) {
            $tags[\'iframe\'] = array(
                \'allowfullscreen\' => TRUE,
                \'frameborder\' => TRUE,
                \'height\' => TRUE,
                \'src\' => TRUE,
                \'style\' => TRUE,
                \'width\' => TRUE,
            );
        }
        return $tags;
    }