php使用curl代理实现抓取数据的方法

define ('IS_PROXY', true );//是否启用代理

functionasync_get_url($url_array,$wait_usec= 0)

{

if(!is_array($url_array))

returnfalse;

$wait_usec=intval($wait_usec);

$data =array();

$handle=array();

$running= 0;

$mh= curl_multi_init();// 开启多线程

$i= 0;

foreach($url_arrayas$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.*cnpr**oxy.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($handleas$i=>$ch) {

$content= curl_multi_getcontent($ch);

$data[$i] = (curl_errno($ch) == 0) ?$content: false;

}

/* 移除 handle*/

foreach($handleas$ch) {

curl_multi_remove_handle($mh,$ch);

}

curl_multi_close($mh);

return$data;

}

$urls=array('http://map.*ba**idu.com');

$re= async_get_url($urls);

echo$re[0];

?>