php curl的深入解析

$url='http://sou.zhaopin./jobs/searchresult.ashx?jl=%E6%B7%B1%E5%9C%B3&kw=php&sm=0&p=1';
//初始化
$ch = curl_init();
//设置选项，包括URL
curl_set($ch, CURLOPT_URL, $url);
curl_set($ch, CURLOPT_RETURNTRANSFER, 1);//不自动输出内容
curl_set($ch, CURLOPT_HEADER, 0);//不返回头部信息
//执行curl
$output = curl_exec($ch);
//错误提示
if(curl_exec($ch) === false){
    die(curl_error($ch));
}
//释放curl句柄
curl_close($ch);
header('Content-type: text/html; charset=utf-8');
echo $output;

//职位名称
preg_match_all('/<td class="Jobname">.?<a\shref="(.?)"\starget="_blank">(.?)<\/a>/s', $output, $title);
$title[1];//链接
$title[2];//标题
//公司名称
preg_match_all('/<td class="Companyname">.?<a href="(.?)"\starget="_blank">(.?)<\/a>/s', $output, $pany);
$pany[1];//链接
$pany[2];//名字
//工作地点
preg_match_all('/<td class="Companyaddress">\s(.?)\s<\/td>/s', $output, $address);
$address[1];//地点
//发布日期
preg_match_all('/<td class="releasetime">\s(.?)\s<\/td>/s', $output, $time);
$time[1];//时间
var_dump($time[1]);

$post=array(
'uid'=>'test',
'pwd'=>'curl123'
);
curl_set($ch, CURLOPT_POST, 1);//设置为POST方式
curl_set($ch, CURLOPT_POSTFIELDS, http_build_query($post));//POST数据

$savefile=dirname(__FILE__).'save.txt';
$getfile=dirname(__FILE__).'get.txt';
//可以分开使用
curl_set($ch, CURLOPT_COOKIEJAR, $savefile); //保存 
curl_set($ch, CURLOPT_COOKIEFILE, $getfile); //读取

curl_set($ch, CURLOPT_HTTPHEADER, array('X-FORWARDED-FOR:8.8.8.8', 'CLIENT-IP:8.8.8.8'));//构造IP 
curl_set($ch, CURLOPT_REFERER, "http://.baidu.");//构造来路 

// 创建一对cURL资源
$ch1 = curl_init();
$ch2 = curl_init();
// 设置URL和相应的选项
curl_set($ch1, CURLOPT_URL, "http://.example./");
curl_set($ch1, CURLOPT_HEADER, 0);
curl_set($ch2, CURLOPT_URL, "http://.php./");
curl_set($ch2, CURLOPT_HEADER, 0);
// 创建批处理cURL句柄
$mh = curl_multi_init();
// 增加2个句柄
curl_multi_add_handle($mh,$ch1);
curl_multi_add_handle($mh,$ch2);
$running=null;
// 执行批处理句柄
do {
    usleep(10000);
    curl_multi_exec($mh,$running);
} while ($running > 0);
// 关闭全部句柄
curl_multi_remove_handle($mh, $ch1);
curl_multi_remove_handle($mh, $ch2);
curl_multi_close($mh);