如果这对其他人有帮助，我使用Better Wordpress External Links 插件并在根目录中创建一个名为exit的页面。php

在“Prefix external links with”下的插件设置中，我选择了“自定义url”，并输入-http://mysite.com/exit.php?redirect=

我还选中了“处理页面范围的链接？”

在出口内。php页面我添加了一些js来处理倒计时。

<script>

      // Parse the query string to get the destination URL
      var params = {};
      var pairs = window.location.search.substring(1).split(\'&\');
      for (var i = 0; i < pairs.length; i++) {
          var components = pairs[i].split(\'=\');
          params[components[0]] = decodeURIComponent(components[1]);
      }

      setTimeout(function() { window.location = params.redirect; }, 5000);
</script>


<script>

    $(function(){
  var count = 5;
  countdown = setInterval(function(){
    $(".countdown").html(count);

    count--;
  }, 1000);
});

</script>

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<p><a href="#" onClick="history.go(-1);return false;">If you would like to remain on this site, click here.</a></p>