Typecho函数实现外链新标签打开

在主题的functions.php中加入

function parseContent($obj){
    $options = Typecho_Widget::widget('Widget_Options');
    if(!empty($options->src_add) && !empty($options->cdn_add)){
        $obj->content = str_ireplace($options->src_add,$options->cdn_add,$obj->content);
    }
    $obj->content = preg_replace_callback("/<a href=\"([^\"]*)\">/i", function($matches) use ($options){
        $url = $matches[1];
        if (strpos($url, $options->siteUrl) === false) {
            return "<a href=\"$url\" target=\"_blank\">";
        } else {
            return "<a href=\"$url\">";
        }
    }, $obj->content);
    echo trim($obj->content);
}

将post.php中的<?php $this->content(); ?>改为<?php $this->parseContent(); ?>即可实现内部链接当前标签页打开，外部链接新标签页打开。