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请将以下内容保存为 Add-nofollow-to-XFN.php 并上传至 wp-content/plugins/ 目录，然后在后台启用该插件即可。您也可以直接下载该插件：Add-nofollow-to-XFN 插件

<?php
/*
Plugin Name: Add-nofollow-to-XFN
Plugin URI: http://www.slyar.com/blog/Add-nofollow-to-XFN
Description: 在后台链接管理的XFN关系中添加一个 nofollow 标签
Author: Slyar
Version: 1.2
Author URI: http://www.slyar.com/
*/

function admin_xfn() {?>
<script type="text/javascript">
<!--
addLoadEvent(addNofollowTag);
function addNofollowTag() {
	tables = document.getElementsByTagName('table');
	for(i=0;i<tables.length;i++) {
		if(tables[i].getAttribute("class") == "links-table") {
			tr = tables[i].insertRow(1);
			th = document.createElement('th');
			th.setAttribute('scope','row');
			th.appendChild(document.createTextNode('Follow'));
			td = document.createElement('td');
			tr.appendChild(th);
			label = document.createElement('label');
			input = document.createElement('input');
			input.setAttribute('type','checkbox');
			input.setAttribute('id','nofollow');
			input.setAttribute('value','nofollow');
			label.appendChild(input);
			label.appendChild(document.createTextNode(' nofollow'));
			td.appendChild(label);
			tr.appendChild(td);
			input.name = 'nofollow';
			input.className = 'valinp';
			if (document.getElementById('link_rel').value.indexOf('nofollow') != -1) {
			input.setAttribute('checked','checked');
			}
			return;
		}
	}
}
//-->
</script>
<?php
}

add_action('admin_head','admin_xfn');

return;