发现之前弄的typecho百度收录检测代码不能用了，不管是收录还是未收录都显示已收录，于是便百度了一下，本方法采用的是调用api的方法，效果请看本博客的文章末尾处。

1.在模板post.php显示收录的位置加入以下代码（样式自己弄下）

<span id="baidu_result">加载中</span>

2.还是在post.php内加入以下代码（必须引入jquery）

<script>
        function baidu_check(){
            var url= window.location.href
            $.getJSON("https://cn1.api.wfblog.net/baidu.php?domain="+url,function(result){ //调用api
                if (result.code == 200) {
                    $('#baidu_icon').removeClass('glyphicon-refresh');
                    $('#baidu_icon').addClass('glyphicon-ok-circle');
                    $('#baidu_result').text('百度已收录');
                }else if(result.code == 403){
                    $('#baidu_icon').removeClass('glyphicon-refresh');
                    $('#baidu_icon').addClass('glyphicon-info-sign');
                    /*$('#baidu_result').text('百度未收录');*/
                    $('#baidu_result').html('<a style="color:red;" rel="external nofollow" title="点击提交收录！" target="_blank" href="https://ziyuan.baidu.com/linksubmit/url?sitename='+url+'">百度未收录</a>');

                }else{
                    $('#baidu_icon').removeClass('glyphicon-refresh');
                    $('#baidu_icon').addClass('glyphicon-remove-circle');
                    $('#baidu_result').text('查询收录失败');
                }
            });
        }
        baidu_check();
</script>

为了防止API挂掉，也可以自己搭建API，API代码如下：

<?php
/**
 * Baidu
 * @editer: Weifeng
 * @link: https://wfblog.net
 * @version: 1.0
 */

error_reporting(0);
header("Access-Control-Allow-Origin:*");
header('Content-type: application/json');

$domain = @$_GET['domain'];
if(!isset($domain) || empty($domain) || $domain==''){
    $data = array(
        "code" => false,
        "msg" => "未传入请求参数！"
    );
    echo json_encode($data,JSON_UNESCAPED_UNICODE);
    exit;
}
if(substr($domain, -1) == '/'){
    $domain = substr($domain,0,strlen($domain)-1);
}

$data = checkBaidu($domain);
echo json_encode($data,JSON_UNESCAPED_UNICODE);

function checkBaidu($url){
    $header = array(
        "Host:www.baidu.com",
        "Content-Type:application/x-www-form-urlencoded",//post请求
        "Connection: keep-alive",
        "Referer:https://www.baidu.com",
        "User-Agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/80.0.3987.162 Safari/537.36"
    );
    $url = 'https://www.baidu.com/s?ie=UTF-8&wd='.urlencode($url).'&usm=3&rsv_idx=2&rsv_page=1';
    $ch = curl_init();
    curl_setopt($ch, CURLOPT_URL, $url);
    curl_setopt ($ch, CURLOPT_HTTPHEADER, $header);
    curl_setopt($ch, CURLOPT_FOLLOWLOCATION,1);
    curl_setopt($ch, CURLOPT_RETURNTRANSFER, 1);
    $output = curl_exec($ch);
    curl_close($ch);
    if(strpos($output, '没有找到') || strpos($output, '很抱歉')){
        $data = array(
            "code" => 403,
            "msg" => "该域名暂时未被百度收录！"
        );
    }else{
        $number = GetBetween($output,'<span class="nums_text">百度为您找到相关结果约','个</span>');
        if(empty($number) || $number == 0){
            $number = GetBetween($output,'<b>找到相关结果数约','个</b></p>');
            if(empty($number) || $number == 0){
                $data = array(
                    "code" => false,
                    "msg" => "获取百度收录失败！"
                );
                return $data;
            }
        }
        $data = array(
            "code" => 200,
            "msg" => "该域名已被百度收录！",
            "number" => str_replace(',','',$number)
        );
    }
    return $data;
}

function GetBetween($content,$start,$end){
    $r = explode($start, $content);
    if (isset($r[1])){
        $r = explode($end, $r[1]);
        return $r[0];
    }
}
?>

方法来自：https://wfblog.net/archives/baidu_check.html