php的百度关键字排名查询函数,第二页的站点无返回值
第一页的关键词都返回正常结果,第二页的收不到值,不知道怎么回事,代码如下
<?phpfunction search($keyword, $url, $page = 1){ $px = 0; $rsState = false; $enKeyword = urlencode($keyword); $firstRow = ($page - 1) * 10; if ($page > 2) { return array(0,0,0); } try{ $contents = file_get_contents("http://www.baidu.com/s?wd=$enKeyword&pn=$firstRow"); }catch (Exception $e){ echo '超时'; die(); } preg_match_all('/<table[^>]*?class="result"[^>]*>[\s\S]*?<\/table>/i', $contents, $rs); foreach ($rs[0] as $k => $v) { $px++; $v = str_replace(array( '<b>', '</b>' ), '', $v);//去除英文关键字的加粗标签 if (strstr($v, $url)) { $rsState = true; $arr_rank=array($px,$page,++$k); //print_r($arr_rank); return array($px,$page,++$k);//$px排名,$page为所在页数,++$k为关键词所在页数的具体位置 } } unset($contents); if ($rsState === false) { search($keyword, $url, ++$page); }}?><?$keyword1="百度优化";$site1="ppc.admin5.com";$keyword2="青岛酒店预订";$site2="www.hotel0512.com";$keyword3="青岛酒店预订";$site3="www.17u.com";$arr_paiming1=search($keyword1, $site1);print_r($arr_paiming1);echo '<br>';$arr_paiming2=search($keyword2, $site2);print_r($arr_paiming2);echo '<br>';$arr_paiming3=search($keyword3, $site3);print_r($arr_paiming3);echo '<br>';?>
回复讨论(解决方案)
这个问题很复杂么?
不知道返回数据的含义
也不知道第二页该是什么
你也没有示例第二页的操作
不知道返回数据的含义
也不知道第二页该是什么
你也没有示例第二页的操作
可以看这里,http://hi.baidu.com/alexkh/item/023a90dd18ca59c51a72b415
我只是把这个函数提出来了而已
//print_r($arr_rank); return array($px,$page,++$k);//$px排名,$page为所在页数,++$k为关键词所在页数的具体位置
其实奇怪就奇怪在这个地方,print_r()的时候还有值呢,return的时候就成空了
来个明白人给瞅瞅吧
你有递归,为何不返回递归数据呢?
if ($rsState === false)
{
search($keyword, $url, ++$page);
}
至少因为应为
if ($rsState === false)
{
return search($keyword, $url, ++$page);
}
结果应该是这样的吗?(search入口处打印了传入参数)
百度优化, ppc.admin5.com, 1
Array
(
[0] => 6
[1] => 1
[2] => 7
)
青岛酒店预订, www.hotel0512.com, 1
青岛酒店预订, www.hotel0512.com, 2
Array
(
[0] => 4
[1] => 2
[2] => 5
)
青岛酒店预订, www.17u.com, 1
Array
(
[0] => 2
[1] => 1
[2] => 3
)
谢谢了,看来我还是不懂算法啊
你有递归,为何不返回递归数据呢?
if ($rsState === false)
{
search($keyword, $url, ++$page);
}
至少因为应为
if ($rsState === false)
{
return search($keyword, $url, ++$page);
}
结果应该是这样的吗?(search入口处打印了传入参数)
百度优化, ppc.admin5.com, 1
Array
(
[0] => 6
[1] => 1
[2] => 7
)
青岛酒店预订, www.hotel0512.com, 1
青岛酒店预订, www.hotel0512.com, 2
Array
(
[0] => 4
[1] => 2
[2] => 5
)
青岛酒店预订, www.17u.com, 1
Array
(
[0] => 2
[1] => 1
[2] => 3
)

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