将以下代码加入到主题目录functions.php文件即可，7b2主题请放到子主题functions.php中

//复制粘贴  
function zm_copyright_tips() {
echo '<link rel="stylesheet" type="text/css" rel="external nofollow" target="_blank" href="https://cdn.bootcss.com/sweetalert/1.1.3/sweetalert.min.css" >';
echo '<script src="https://cdn.bootcss.com/sweetalert/1.1.3/sweetalert.min.js"></script>';
echo '<script>document.body.oncopy = function() { swal("复制成功！", "转载请务必保留原文链接，申明来源，谢谢合作！！","success");};</script>';
}
add_action( 'wp_footer', 'zm_copyright_tips', 100 );

清理缓存F5刷新即可