官方解釋
curl是一個(gè)利用URL語(yǔ)法在命令行方式下工作的文件傳輸工具。curl是一個(gè)利用URL語(yǔ)法在命令行方式下工作的文件傳輸工具。
它支持很多協(xié)議：FTP, FTPS, HTTP, HTTPS, GOPHER, TELNET, DICT, FILE 以及 LDAP。curl同樣支持HTTPS認(rèn)證，HTTP POST方法, HTTP PUT方法, FTP上傳, kerberos認(rèn)證, HTTP上傳, 代理服務(wù)器, cookies, 用戶(hù)名/密碼認(rèn)證, 下載文件斷點(diǎn)續(xù)傳,
上載文件斷點(diǎn)續(xù)傳, http代理服務(wù)器管道（ proxy tunneling）, 甚至它還支持IPv6, socks5代理服務(wù)器, 通過(guò)http代理服務(wù)器上傳文件到FTP服務(wù)器等等，功能十分強(qiáng)大。

curl講解一

PHP中curl函數(shù)應(yīng)用
簡(jiǎn)單的來(lái)說(shuō)一共四步
curl_init();
curl_setopt();
curl_exec();
curl_close();

最重要的命令就是 curl_setopt();

一個(gè)簡(jiǎn)單的post請(qǐng)求例子
index.php

復(fù)制代碼 代碼如下:

<?php
$url = "http://www.mytest.com/curl/login.php";  //請(qǐng)求的url地址
$user = "zkg111"; //用戶(hù)名
$pass = "123456";
$postdata = "user_name=".$user."&password=".$pass;  //請(qǐng)求的數(shù)據(jù)，以 & 符號(hào)分割
$curl = curl_init(); //開(kāi)啟curl
curl_setopt($curl, CURLOPT_URL, $url); //設(shè)置請(qǐng)求地址
curl_setopt($curl, CURLOPT_RETURNTRANSFER, 1);  //是否輸出 1 or true 是不輸出 0  or false輸出
curl_setopt($curl, CURLOPT_POST, 1); //是否使用post方法請(qǐng)求
curl_setopt($curl, CURLOPT_POSTFIELDS, $postdata);  //post數(shù)據(jù)

 
echo $data = curl_exec($curl); //執(zhí)行curl操作
curl_close($curl);
?>

復(fù)制代碼 代碼如下:

<?php
$url = "http://bbs.lampbrother.net/login.php";
$urls = "http://bbs.lampbrother.net";
$lgt = 0;
$user = "XXXX";
$pass = "XXXX";
$question = 0;
$hideid = 1;
 $cookie_file    =    tempnam('./temp','cookie');
 $postdata = "forward=&jumpurl=".$urls."&step=2&lgt=".$lgt."&pwuser=".$user."&pwpwd=".$pass."&question=".$question."&answer=&hideid=".$hideid;
$ch = curl_init();
curl_setopt($ch, CURLOPT_URL, $url);
curl_setopt($ch, CURLOPT_HEADER, 0);
curl_setopt($ch, CURLOPT_RETURNTRANSFER, 1);
curl_setopt($ch, CURLOPT_POST, 1);
curl_setopt($ch, CURLOPT_POSTFIELDS, $postdata);
curl_setopt($ch, CURLOPT_COOKIEJAR, $cookie_file);
curl_setopt($ch, CURLOPT_FOLLOWLOCATION, true);
 $data = curl_exec($ch);
curl_close($ch);
 //echo $data;
$ch = curl_init();
curl_setopt($ch, CURLOPT_URL, 'http://bbs.lampbrother.net/');
curl_setopt($ch, CURLOPT_HEADER, 0);
curl_setopt($ch, CURLOPT_RETURNTRANSFER, 0);
curl_setopt($ch, CURLOPT_COOKIEFILE, $cookie_file);
curl_exec($ch);
curl_close($ch);
?>