将下面的代码添加到主题的 function.php 中
function rt_add_link_target( $content ){// use the tag to split into segments$bits = explode( '$bit ){// fix the target="_blank" bug after the linkif ( 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 presentif( strpos( $part, $siteurl ) === false && strpos( $part, 'target=' ) === false ){// add the target attribute$bits[$key] = 'target="_blank" ' . $bits[$key];}}}// re-assemble the content, and return itreturn implode( '