Home php教程 php手册 CURL传输与获取功能

CURL传输与获取功能

Jun 13, 2016 am 09:33 AM
curl php

什么是CURL?
利用URL语法爱命令行方式下工作的文件传输工具。它支持很多协议。它支持认证功能。php中常用都实现更复杂的传输功能。
实现的功能:
1、实现远程获取和采集内容
2、实现PHP 网页版的FTP上传下载
3、实现模拟登陆:去一个邮件系统,curl可以模拟cookies
4、实现接口对接(API),数据传输等:通过一个平台发送短信啊,抓取和传递所传输的信息。
5、实现模拟Cookie等:登陆的状态下才可以操作一些属性。


如何使用CURL功能:
默认情况加PHP是不支持CURL的,需要在php.ini中开启该功能
;extension=php_curl.dll前面的分号去掉
1  整个操作过程中第一步是用cur_init()函数进行初始化
$curl = curl_init(‘www.php100.com’)
2.用curl_setopt()函数进行设置选项。
3.设置后,进行执行事务 curl_exec($curl);
4 最后关闭curl_close();


使用PHP CURL实现传输和获取功能(post传输方式):获取远程网页数据
$user = "admin";
$pass = "admin100";
$curlPost = "user=$user&pass=$pass";
$ch = curl_init(); //初始化一个CURL对象
curl_setopt($ch, CURLOPT_URL, "http://localhost/edu/login.php");
//设置你所需要抓取的URL
curl_setopt($ch, CURLOPT_RETURNTRANSFER, 0);
//设置curl参数,要求结果是否输出到屏幕上,为true的时候是不返回到网页中
假设上面的0换成1的话,那么接下来的$data就需要echo一下。
curl_setopt($ch, CURLOPT_POST, 1);
//post提交
curl_setopt($ch, CURLOPT_POSTFIELDS, $curlPost);

$data = curl_exec($ch);
//运行curl,请求网页。
curl_close($ch);
实现远程模拟登陆最基础部分。
curl也还是需要配置用户名和密码的,只不过是被浏览器隐藏了。
============================================================================
curl模拟登陆

模拟登陆:就是不登陆到php100的论坛,也能查看到相应的信息。
分析登陆字段--->登陆后保留cookie状-->读取cookie并跳转到相关页-->抓取数
1、模拟登陆后创建一个文件保存cookie内容
2、通过读取生成的cookie内容模拟用户登陆状态
3、到相关页面获取所需内容

tempname创建一个临时文件
tempnam() 函数创建一个具有唯一文件名的临时文件。若成功,则该函数返回新的临时文件名。若失败,则返回 false。
tempnam(dir,prefix)
参数 描述
dir 必需。规定创建临时文件的目录。
prefix 必需。规定文件名的开头。
相当于,fopen  fwirte  fclose
它可以返回一个布尔值。使用第三方来登陆你的QQ、msn是很危险的,因为它可以记录你的登录状态,抓取你的用户名和密码。

使用CURL模拟登陆到PHP100论坛

1、分析登陆所需input框字段名和所需字段数量

2、保存cookie 模拟登陆后获取会员金币数量

 

 

code:

//初始化一个 cURL 对象
$curl = curl_init();

//设置你需要抓取的URL
curl_setopt($curl, CURLOPT_URL, "http://www.baidu.com");

//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, 0);

//运行cURL,请求网页
$data = curl_exec($curl);

//关闭URL请求
curl_close($curl);


$user = "admin";
$pass = "admin100";
$curlPost = "user=$user&pass=$pass";
$ch = curl_init();
curl_setopt($ch, CURLOPT_URL, "http://localhost/curl/login.php");
curl_setopt($ch, CURLOPT_RETURNTRANSFER, 0);
curl_setopt($ch, CURLOPT_POST, 1);
curl_setopt($ch, CURLOPT_POSTFIELDS, $curlPost);
$data = curl_exec($ch);
curl_close($ch);

?>

 

if($_POST['user']=="admin"){
 echo "<script>alert('成功')</script>";
}else{
 echo "<script>alert('失败')</script>";
}
//print_r($_POST);
?>

=====

模拟登陆代码

pw_php100.php
$cookie_file=tempnam('./temp','cookie');
$login_url="http://bbs.php100.com/login.php";
$post_fields="cktime=3600&step=2&pwuser=php100&pwpwd=11111";
$ch=curl_init($login_url);
curl_setopt($ch, CURLOPT_URL, "http://www.baidu.com";
curl_setopt($ch, CURLOPT_RETURNTRANSFER, 0);
curl_setopt($ch, CURLOPT_POST, 1);
curl_setopt($ch, CURLOPT_COOKIEJAR, $cookie_file);
curl_setopt($ch, CURLOPT_POSTFIELDS, $post_fields);
$data = curl_exec($ch);
curl_close($ch);

$url="http://bbs.php100.com/userpay.php";
$ch=curl_init($url);
curl_setopt($ch, CURLOPT_HEADER, 0);
curl_setopt($ch, CURLOPT_RETURNTRANSFER, 1);
curl_setopt($ch, CURLOPT_COOKIEFILE, $cookie_file);
$contents = curl_exec($ch);
preg_match("/

  • 金钱:/",$contents,$arr);
    echo $arr[1];
    curl_close($ch);

    ?>

    ======

    login.php

     print_r($_POST);

    ?>

    ====================

    curl.php

    $curlPost = "user=$user&pass=$pass";
    $ch = curl_init();
    curl_setopt($ch, CURLOPT_URL, "http://localhost/edu/login.php");
    curl_setopt($ch, CURLOPT_RETURNTRANSFER, 0);
    curl_setopt($ch, CURLOPT_POST, 1);
    curl_setopt($ch, CURLOPT_POSTFIELDS, $curlPost);
    $data = curl_exec($ch);
    curl_close($ch);
    ?>

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