怎么样通过PHP使用curl代理实现抓取数据功能？
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];
?>
希望本文所述对大家PHP程序设计有所帮助。
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