site-求教php问题，如何在wordpress主题里输出插件的内容

 //show contribute meta data        function contribute_metadata( $content ){                if( is_single() ){                        $DXC_options = get_option( 'DX-Contribute-options' );                        $pid = get_the_ID();                        $metas = get_post_meta( $pid, '_DX_Contribute', true );                        if( $DXC_options['meta-on'] = 'on' && $metas ){                                $avatar = get_avatar( $metas['email'], 25 );                                $url = ($metas['site'] == 'true') ? '' : $metas['site'];                                $user = $metas['user'];                                $site = ( $url ) ? ''.$user.'' : ''.$user.'';                                $style = '';                                $meta_code = ''.$avatar.''.$site.' 提交于'.get_the_time( 'Y-m-d H:i:s' ).'';                                if( $DXC_options[ 'metapo' ]=='head' ){                                        $content = $style.$meta_code.$content;                                }                                else $content .= $style.$meta_code;                                                }                }                return $content;        }

这一段是插件内的内容，他将自动在文章页面内重输出文章内容
但是我想在首页指定地方输出$user的内容怎么做到呢