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PHP扩展CURL的用法详解_php实例

May 17, 2016 am 08:41 AM
curl php

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.jb51.net')
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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 = "admin";
$curlPost = "user=$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);
[/code]
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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

代码:

//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 "";
}else{
 echo "";
}
//print_r($_POST);
?>
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