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;