PHP多线程批量采摘下载美女图片的实现代码
PHP多线程批量采集下载美女图片的实现代码
使用curl的多线程,另外curl可以设置请求时间,遇到很慢的url资源,可以果断的放弃,这样没有阻塞,另外有多线程请求,效率应该比较高
下面是代码实现
/** * curl 多线程 * @author http://www.lai18.com * @param array $array 并行网址 * @param int $timeout 超时时间 * @return mix */ public function Curl_http($array,$timeout='15'){ $res = array(); $mh = curl_multi_init();//创建多个curl语柄 foreach($array as $k=>$url){ $conn[$k]=curl_init($url);//初始化 curl_setopt($conn[$k], CURLOPT_TIMEOUT, $timeout);//设置超时时间 curl_setopt($conn[$k], CURLOPT_USERAGENT, 'Mozilla/5.0 (compatible; MSIE 5.01; Windows NT 5.0)'); curl_setopt($conn[$k], CURLOPT_MAXREDIRS, 7);//HTTp定向级别 ,7最高 curl_setopt($conn[$k], CURLOPT_HEADER, false);//这里不要header,加块效率 curl_setopt($conn[$k], CURLOPT_FOLLOWLOCATION, 1); // 302 redirect curl_setopt($conn[$k], CURLOPT_RETURNTRANSFER,1);//要求结果为字符串且输出到屏幕上 curl_setopt($conn[$k], CURLOPT_HTTPGET, true); curl_multi_add_handle ($mh,$conn[$k]); } //防止死循环耗死cpu 这段是根据网上的写法 do { $mrc = curl_multi_exec($mh,$active);//当无数据,active=true } while ($mrc == CURLM_CALL_MULTI_PERFORM);//当正在接受数据时 while ($active and $mrc == CURLM_OK) {//当无数据时或请求暂停时,active=true if (curl_multi_select($mh) != -1) { do { $mrc = curl_multi_exec($mh, $active); } while ($mrc == CURLM_CALL_MULTI_PERFORM); } } foreach ($array as $k => $url) { if(!curl_errno($conn[$k])){ $data[$k]=curl_multi_getcontent($conn[$k]);//数据转换为array $header[$k]=curl_getinfo($conn[$k]);//返回http头信息 curl_close($conn[$k]);//关闭语柄 curl_multi_remove_handle($mh , $conn[$k]); //释放资源 }else{ unset($k,$url); } } curl_multi_close($mh); return $data; }//参数接收$callback = $_GET['callback'];$hrefs = $_GET['hrefs'];$urlarray = explode(',',trim($hrefs,','));$date = date('Ymd',time());//实例化$img = new HttpImg();$stime = $img->getMicrotime();//开始时间$data = $img->Curl_http($urlarray,'20');//列表数据mkdir('./img/'.$date,0777);foreach ((array)$data as $k=>$v){ preg_match_all("/(href|src)=(["|']?)([^ "'>]+.(jpg|png|PNG|JPG|gif))\2/i", $v, $matches[$k]); if(count($matches[$k][3])>0){ $dataimg = $img->Curl_http($matches[$k][3],'20');//全部图片数据二进制 $j = 0; foreach ((array)$dataimg as $kk=>$vv){ if($vv !=''){ $rand = rand(1000,9999); $basename = time()."_".$rand.".".jpg;//保存为jpg格式的文件 $fname = './img/'.$date."/"."$basename"; file_put_contents($fname, $vv); $j++; echo "创建第".$j."张图片"."$fname"."<br>"; }else{ unset($kk,$vv); } } }else{ unset($matches); }}$etime = $img->getMicrotime();//结束时间echo "用时".($etime-$stime)."秒";exit;

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