php下通过curl抓取yahoo boss 搜索结果的实现代码

1.编写curl类，进行网页内容抓取

class CurlUtil 
{ 
private $curl; 
private $timeout = 10; 
/** 
* 初始化curl对象 
*/ 
public function __construct() 
{ 
$this->curl = curl_init(); 
curl_setopt($this->curl, CURLOPT_RETURNTRANSFER, 1); 
curl_setopt($this->curl, CURLOPT_USERAGENT, "Mozilla/4.0 (compatible; MSIE 6.0; Windows NT 5.1; SV1)"); 
curl_setopt($this->curl, CURLOPT_HEADER, false); //设定是否显示头信息 
curl_setopt($this->curl, CURLOPT_NOBODY, false); //设定是否输出页面内容 
curl_setopt($this->curl, CURLOPT_CONNECTTIMEOUT, $this->timeout); 
curl_setopt($this->curl, CURLOPT_FOLLOWLOCATION, true); 
curl_setopt($this->curl, CURLOPT_AUTOREFERER, true); 
} 
/** 
* 注销函数 关闭curl对象 
*/ 
public function __destruct() 
{ 
curl_close($this->curl); 
} 
/** 
* 获取网页的内容 
*/ 
public function getWebPageContent($url) 
{ 
curl_setopt($this->curl, CURLOPT_URL, $url); 
return curl_exec($this->curl); 
} 
}

2.创建curl对象

$CurlUtil = new CurlUtil();

3.抓取yahoo搜索结果

function getYahooSearch(CurlUtil $curl, $key) 
{ 
$key = urlencode($key); 
$searchUrl = "http://boss.yahooapis.com/ysearch/web/v1/$key?appid=你的雅虎appid&lang=tzh®ion=hk&abstract=long&count=20&format=json&start=0&count=10"; 
$josnStr = $curl->getWebPageContent($searchUrl); 
$searchDataInfo = json_decode($josnStr, true); 
$searchData = $searchDataInfo['ysearchresponse']['resultset_web']; 
$returnArray = array(); 
if (!empty($searchData)) { 
foreach ($searchData as $data) { 
$returnArray[] = array("url" => $data['url'], "date" => $data['date'], 'title' => strip_tags($data['title']), 'description' => strip_tags($data['abstract'])); 
} 
} 
return $returnArray; 
}

4.测试结果
var_dump(getYahooSearch($CurlUtil, "百度"));