php使用curl代理实现抓取数据的方法

本文实例讲述了php使用curl代理实现抓取数据的方法。分享给大家供大家参考，具体如下：&l

本文实例讲述了php使用curl代理实现抓取数据的方法。分享给大家供大家参考，具体如下：

<?php
define ( 'IS_PROXY', true ); //是否启用代理
function async_get_url($url_array, $wait_usec = 0)
{
 if (!is_array($url_array))
 return false;
 $wait_usec = intval($wait_usec);
 $data = array();
 $handle = array();
 $running = 0;
 $mh = curl_multi_init(); // 开启多线程
 $i = 0;
 foreach($url_array as $url) {
 $ch = curl_init();
 if (IS_PROXY) {
 //以下代码设置代理服务器
 //代理服务器地址http://www.cnproxy.com/proxy1.html !!Hong Kong, China的速度比较好
 curl_setopt ($ch, CURLOPT_PROXY,'110.4.12.170:80' );
 }
 curl_setopt($ch, CURLOPT_URL, $url);
 curl_setopt($ch, CURLOPT_RETURNTRANSFER, 1); // return don't print
 curl_setopt($ch, CURLOPT_TIMEOUT, 30); //设置超时时间
 curl_setopt($ch, CURLOPT_USERAGENT, 'Mozilla/4.0 (compatible; MSIE 5.01; Windows NT 5.0)');
 curl_setopt($ch, CURLOPT_FOLLOWLOCATION, 1); // 302 redirect
 curl_setopt($ch, CURLOPT_MAXREDIRS, 7); //HTTp定向级别
 curl_multi_add_handle($mh, $ch); // 把 curl resource 放进 multi curl handler 里
 $handle[$i++] = $ch;
 }
 /* 执行 */
 do {
 $mrc = curl_multi_exec($mh, $running);
 if ($wait_usec > 0) /* 每个 connect 要间隔多久 */
 usleep($wait_usec); // 250000 = 0.25 sec
 } while ($mrc == CURLM_CALL_MULTI_PERFORM);
 while ($running && $mrc == CURLM_OK) {
 if (curl_multi_select($mh) != -1) {
 do {
 $mrc = curl_multi_exec($mh, $running);
 } while ($mrc == CURLM_CALL_MULTI_PERFORM);
 }
 }
 /* 读取资料 */
 foreach($handle as $i => $ch) {
 $content = curl_multi_getcontent($ch);
 $data[$i] = (curl_errno($ch) == 0) ? $content : false;
 }
 /* 移除 handle*/
 foreach($handle as $ch) {
 curl_multi_remove_handle($mh, $ch);
 }
 curl_multi_close($mh);
 return $data;
}
$urls = array('http://map.baidu.com');
$re = async_get_url($urls);
echo $re[0];
?>