$my_curl = curl_init();    //初始化一个curl对象

curl_setopt($my_curl, CURLOPT_URL, "http://www.webjoy.net");  //设置你需要抓取的URL

curl_setopt($my_curl,CURLOPT_RETURNTRANSFER,1);  //设置是将结果保存到字符串中还是输出到屏幕上，1表示将结果保存到字符串

$str = curl_exec($curl);    //执行请求

echo $str;  //输出抓取的结果

curl_close($curl);  //关闭url请求

// 封装

function curl_file_get_contents($url){

    $ch = curl_init();

    curl_setopt($ch, CURLOPT_URL, $url);

    curl_setopt($ch, CURLOPT_TIMEOUT, 5);

    curl_setopt($ch, CURLOPT_USERAGENT, _USERAGENT_);

    curl_setopt($ch, CURLOPT_REFERER,_REFERER_);

    curl_setopt($ch, CURLOPT_RETURNTRANSFER, 1);

    $r = curl_exec($ch);

    curl_close($ch);

    return $r;

}

<?php
function HTTP_Post($URL,$data,$cookie, $referrer="")
{
// parsing the given URL
$URL_Info=parse_url($URL);

// Building referrer
if($referrer=="") // if not given use this script as referrer
$referrer="111″;

// making string from $data
foreach($data as $key=>$value)
$values[]="$key=".urlencode($value);
$data_string=implode("&",$values);

// Find out which port is needed – if not given use standard (=80)
if(!isset($URL_Info["port"]))
$URL_Info["port"]=80;

// building POST-request:
$request.="POST ".$URL_Info["path"]." HTTP/1.1n";
$request.="Host: ".$URL_Info["host"]."n";
$request.="Referer: $referern";
$request.="Content-type: application/x-www-form-urlencodedn";
$request.="Content-length: ".strlen($data_string)."n";
$request.="Connection: closen";

$request.="Cookie: $cookien";

$request.="n";
$request.=$data_string."n";

$fp = fsockopen($URL_Info["host"],$URL_Info["port"]);
fputs($fp, $request);
while(!feof($fp)) {
$result .= fgets($fp, 1024);
}
fclose($fp);

return $result;
}
?>