我的调试。日志中有以下消息指向/wp includes/shortcode。php第319行，这是WordPress核心的一部分，可能不是代码中真正的错误所在。

PHP Deprecated:  Non-static method RSSjbClass::RSSjb_funct() should not be called statically in /.../wp-includes/shortcodes.php on line 319

我看了319行，但它并没有帮助我找到或解决问题。我搜索了代码，找到了这个类和funct，但我不知道静态调用什么是非静态的。

/**
 * Add shortcode to wordpress
 */
// add_shortcode(\'RSSjb\', \'RSSjb_funct\');
add_shortcode(\'RSSjb\', array(\'RSSjbClass\', \'RSSjb_funct\'));
/**
 * Shortcode Class and Function
 */
class RSSjbClass {
    function RSSjb_funct($atts) {
        extract(shortcode_atts(array(
        // attributes for Google News
        "gsearch" => \'\',
        "topic" => \'\',
        "location" => \'\',
        "geo" => \'\',
        "feed" => \'\', // required
        "filter" => \'\',
        "num" => \'5\',
        "ltime" => \'\',
        "list" => \'ul\',
        "target" => \'_blank\',
        "pubdate" => \'false\',
        "pubtime" => \'false\',
        "dformat" => get_option(\'date_format\'),
        "tformat" => get_option(\'time_format\'),
        "pubauthor" => \'true\',
        "excerpt" => \'false\',
        "charex" => \'\',
        "chartle" => \'\',
        "title" => \'\',
        "link" => \'false\',
        "sort" => \'false\',
        "cachefeed" => \'3600\'
    ), $atts));

然后是几个“如果”，然后

    // call the function to read and display the feed items list
        return $tle . rssjb_List($feed, $filter, $num, $ltime, $list, $target, $pubdate, $pubtime, $dformat, $tformat, $pubauthor, $excerpt, $charex, $chartle, $sort, $cachefeed);
    } else {
        return \'<br>RSS or Atom Feed URL not provided. This shortcode does require the attribute feed or location (if Google News).<br /> Ex: <code>[RSSjb feed = "http://your-rss-or-atom-feed-URL-here"]</code>.\'; 
    }
    }
}

如何修改它以适应/wp includes/shortcode中的内容。php第319行，即：

    $output = $m[1] . call_user_func( $shortcode_tags[ $tag ], $attr, $content, $tag ) . $m[6];

    /**
     * Filters the output created by a shortcode callback.
     *
     * @since 4.7.0
     *
     * @param string       $output Shortcode output.
     * @param string       $tag    Shortcode name.
     * @param array|string $attr   Shortcode attributes array or empty string.
     * @param array        $m      Regular expression match array.
     */
    return apply_filters( \'do_shortcode_tag\', $output, $tag, $attr, $m );
}

我搜索了PHP手册，它没有任何关于短代码的内容。

// Type 1: Simple callback
call_user_func(\'my_callback_function\');

// Type 2: Static class method call
call_user_func(array(\'MyClass\', \'myCallbackMethod\'));

// Type 3: Object method call
$obj = new MyClass();
call_user_func(array($obj, \'myCallbackMethod\'));

add_shortcode(\'RSSjb\', array(\'RSSjbClass\', \'RSSjb_funct\'));

function RSSjb_funct($atts) {

public static function RSSjb_funct($atts) {

add_shortcode(\'RSSjb\', [new RSSjbClass, \'RSSjb_funct\']);