CURL的学习和应用(附多线程实现)_PHP教程

# wget http://curl.haxx.se/download/curl-7.17.1.tar.gz
# tar zxvf curl-7.17.1.tar.gz //解压
#cd curl-7.17.1
# ./configure –prefix=/usr/local/curl
# make
# make install

$username = 13800138000;
$password = 123456;
$sendto = 13912345678;
$message = "测试一个试试看！";
$curlPost = 'username='.urlencode($username).'&password='.urlencode($password).'&sendto='.urlencode($sendto).'&message='.urlencode($message).'';
$ch = curl_init();//初始化curl
curl_setopt($ch,CURLOPT_URL,'http://sms.api.bz/fetion.php');//抓取指定网页
curl_setopt($ch, CURLOPT_HEADER, 0);//设置header
curl_setopt($ch, CURLOPT_RETURNTRANSFER, 1);//要求结果为字符串且输出到屏幕上
curl_setopt($ch, CURLOPT_POST, 1);//post提交方式
curl_setopt($ch, CURLOPT_POSTFIELDS, $curlPost);
$data = curl_exec($ch);//运行curl
curl_close($ch);
print_r($data);//输出结果

<?php
/*curl实例
*/
$curl = curl_init();
// 设置你需要抓取的URL
curl_setopt($curl, CURLOPT_URL, 'http://www.baidu.com');
// 设置header
curl_setopt($curl, CURLOPT_HEADER, 0);
// 设置cURL 参数，要求结果保存到字符串中还是输出到屏幕上。
curl_setopt($curl, CURLOPT_RETURNTRANSFER, 1);
// 运行cURL，请求网页
$data = curl_exec($curl);
if($data === false){
echo curl_error($curl);exit;
}
$info = curl_getinfo($curl);
// 关闭URL请求
curl_close($curl);

// 显示获得的数据
var_dump($info);
var_dump($data);

<?php
/*
curl 多线程抓取
*/
/**
* curl 多线程
*
* @param array $array 并行网址
* @param int $timeout 超时时间
* @return array
*/
function Curl_http($array,$timeout){
$res = array();
$mh = curl_multi_init();//创建多个curl语柄
$startime = getmicrotime();
foreach($array as $k=>$url){
$conn[$k]=curl_init($url);

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[$k], CURLOPT_MAXREDIRS, 7);//HTTp定向级别
curl_setopt($conn[$k], CURLOPT_HEADER, 0);//这里不要header，加块效率
curl_setopt($conn[$k], CURLOPT_FOLLOWLOCATION, 1); // 302 redirect
curl_setopt($conn[$k],CURLOPT_RETURNTRANSFER,1);
curl_multi_add_handle ($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 => $url) {
curl_error($conn[$k]);
$res[$k]=curl_multi_getcontent($conn[$k]);//获得返回信息
$header[$k]=curl_getinfo($conn[$k]);//返回头信息
curl_close($conn[$k]);//关闭语柄
curl_multi_remove_handle($mh , $conn[$k]); //释放资源
}

curl_multi_close($mh);
$endtime = getmicrotime();
$diff_time = $endtime - $startime;

return array('diff_time'=>$diff_time,
'return'=>$res,
'header'=>$header
);

}
//计算当前时间
function getmicrotime() {
list($usec, $sec) = explode(" ",microtime());
return ((float)$usec + (float)$sec);
}

//测试一下，curl 三个网址
$array = array(
"http://www.weibo.com/",
"http://www.renren.com/",
"http://www.qq.com/"
);
$data = Curl_http($array,'10');//调用
var_dump($data);//输出

?>