How to filter get_avatar?

我想为我的wp网站使用本地头像系统，我想过滤get_avatar() 它将从我的服务器返回头像，而不是默认的gavatar。

我有以下代码：

class local_avatar{
        
        function __construct(){
            add_filter(\'get_avatar\',array($this,\'get_avatar\'));
        }
        
        public function get_avatar($avatar , $id_or_email , $size = \'96\'  , $default , $alt = false){
            
            global $wpdb;
            $upload = wp_upload_dir();
            
            if(is_numeric($id_or_email)){
                // the user id
                $image = get_user_meta($id_or_email,\'_ahaali_avatar\',true);
                if($image){
                    $image_path = $upload[\'baseurl\'].\'/avatar/\'.$image;
                    $ahaali_avatar = \'<img src="\'.$image_path.\'" width="\'.$size.\'" height="\'.$size.\'" />\';
                }else{
                    $image_path = \'http://0.gravatar.com/avatar/ad516503a11cd5ca435acc9bb6523536?s=\'.$size;
                    $ahaali_avatar = \'<img src="\'.$image_path.\'" width="\'.$size.\'" height="\'.$size.\'" />\';
                }
            }elseif(is_string($id_or_email)){
                // the user email
                $user_id = $wpdb->get_var($wpdb->prepare("SELECT ID FROM wp_users WHERE user_email = %s",
                $id_or_email));
                $image = get_user_meta($user_id,\'_ahaali_avatar\',true);
                if($image){
                    $image_path = $upload[\'baseurl\'].\'/avatar/\'.$image;
                    $ahaali_avatar = \'<img src="\'.$image_path.\'" width="\'.$size.\'" height="\'.$size.\'" />\';
                }else{
                    $image_path = \'http://0.gravatar.com/avatar/ad516503a11cd5ca435acc9bb6523536?s=\'.$size;
                    $ahaali_avatar = \'<img src="\'.$image_path.\'" width="\'.$size.\'" height="\'.$size.\'" />\';
                }
            }
            return $ahaali_avatar;
        }
        
    }

并返回以下错误：

警告：在/home/subhi/public\\u html/work/example中缺少local\\u avatar：：get\\u avatar（）的参数2。com/wp-content/plugins/ahaali\\u-avatar/core。php在线40

警告：在/home/subhi/public\\u html/work/example中缺少local\\u avatar：：get\\u avatar（）的参数4。com/wp-content/plugins/ahaali\\u-avatar/core。php在线40

我如何解决这个问题？

// Custom Default Avatar if ( !function_exists(\'addgravatar\') ) { function addgravatar( $avatar_defaults ) { $myavatar = get_bloginfo(\'template_directory\').\'/images/custom-gravatar.jpg\'; // Change path to your custom avatar $avatar_defaults[$myavatar] = \'Custom Avatar\'; // Change to your avatar name return $avatar_defaults; } add_filter( \'avatar_defaults\', \'addgravatar\' ); }

Run shortcode before filters

我的用户在注释中发布代码片段。我为此创建了一个快捷码：function post_codigo($atts,$content=\"\"){ return \'<code>\'.$content.\'</code>\'; } add_shortcode(\'codigo\',\'post_codigo\'); 问题是html在打包到代码标记之前会被过滤掉。我想如果我能在过滤器之前运行短代码，那么我可以使用fun

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