1- 所有外链在新标签打开 / Open all external links in new tab

function rt_add_link_target( $content ){
    // use the <a> tag to split into segments
    $bits = explode( '<a ', $content );
    // loop though the segments
    foreach( $bits as $key=>$bit ){
        // fix the target="_blank" bug after the link
        if ( strpos( $bit, 'href' ) === false ) continue;
        // find the end of each link
        $pos = strpos( $bit, '>' );
        // check if there is an end (only fails with malformed markup)
        if( $pos !== false ){
            // get a string with just the link's attibutes
            $part = substr( $bit, 0, $pos );
            // for comparison, get the current site/network url
            $siteurl = network_site_url();
            // if the site url is in the attributes, assume it's in the href and skip, also if a target is present
            if( strpos( $part, $siteurl ) === false && strpos( $part, 'target=' ) === false ){
                // add the target attribute
                $bits[$key] = 'target="_blank" ' . $bits[$key];
            }
        }
    }
    // re-assemble the content, and return it
    return implode( '<a ', $bits );
}

2- 启用全站 CDN 后获取访客的真是 IP，尤其是针对评论 IP 显示为 CDN 节点 IP 时使用 / Get the real IP of visitor under the entire site load from a CDN, especially when the IP of comments show as the IP of a CDN server.

在 WordPress 主题配置文件 wp-config.php 中加入 / Add this piece of code to WordPress's configuration file wp-config.php:

if (isset($_SERVER['HTTP_X_FORWARDED_FOR'])) {
    $list = explode(',', $_SERVER['HTTP_X_FORWARDED_FOR']);
    $_SERVER['REMOTE_ADDR'] = $list[0];
}

Still updating...

参考 / References

https://gist.github.com/roytanck/7f0392386914aa2adfb2