WordPress自动检测并显示文章是否被百度收录

/* 检查百度是否已收录文章页面 开始*/
function baidu_check($url){
$url='http://www.baidu.com/s?wd='.$url;
$curl=curl_init();
curl_setopt($curl,CURLOPT_URL,$url);
curl_setopt($curl,CURLOPT_RETURNTRANSFER,1);
$rs=curl_exec($curl);
curl_close($curl);if(!strpos($rs,'没有找到')){return 1;
}else{return 0;
}
}function baidu_record() {if(baidu_check(get_permalink()) == 1) {echo '<a target="_blank" title="点击查看" rel="external nofollow" href="https://www.baidu.com/s?wd='.get_the_title().'">百度已收录</a>';
} else {echo '<a style="color:red;" rel="external nofollow" title="一键帮忙提交给百度，谢谢您！" target="_blank" href="https://zhanzhang.baidu.com/sitesubmit/index?sitename='.get_permalink().'">百度未收录</a>';
}
}

<?php baidu_record();?>