PHP檢測URL是否被百度收錄

示例代碼：

<?php

header('Content-type:text/html;charset=utf-8');

function checkBaidu($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);

    $arr = parse_url($url);

    if(strpos($arr['query'],'http://')){
        $arr['query'] = str_replace('http://','',str_replace('wd=','',$arr['query']));
    } else{

        $arr['query'] = str_replace('wd=','',$arr['query']);
    }

    if(strpos($arr['query'],'?')){
        $str = strstr($arr['query'],'?');
        $arr['query'] = str_replace($str,'',$arr['query']);
    }
    if(strpos($arr['query'],'/')){
        $narr = explode('/',$arr['query']);
        $arr['query'] = $narr[0];
    }

    if(strpos($rs,'<b>'.$arr['query'].'</b>')){
        return '收錄';
    } else{
        return '未收錄';
    }
}
echo checkBaidu('www.sjyhome.com');