Home php教程 php手册 PHP CURL获取cookies模拟登录的方法

PHP CURL获取cookies模拟登录的方法

Jun 06, 2016 pm 08:26 PM
cookies curl php

利用PHP的curl函数实现模拟登录的方法。

要提取google搜索的部分数据,发现google对于软件抓取它的数据屏蔽的厉害,以前伪造下 USER-AGENT 就可以抓数据,但是现在却不行了。利用抓包数据发现,Google 判断了 cookies,当你没有cookies的时候,直接返回 302 跳转,而且是连续几十个302跳转,根本抓不了数据。
因此,在发送搜索命令时,需要先提取 cookies 并保存,然后利用保存下来的这个cookies再次发送搜索命令即可正常抓数据了。这其实和论坛的模拟登录一个道理,,先POST登录,获取cookies并保存,然后利用这个cookies访问就可以了。
PHP 代码如下:

复制代码 代码如下:


header('Content-Type: text/html; charset=utf-8');

$cookie_file = dirname(__FILE__).'/cookie.txt';
//$cookie_file = tempnam("tmp","cookie");

//先获取cookies并保存
$url = "http://www.google.com.hk";
$ch = curl_init($url); //初始化
curl_setopt($ch, CURLOPT_HEADER, 0); //不返回header部分
curl_setopt($ch, CURLOPT_RETURNTRANSFER, true); //返回字符串,而非直接输出
curl_setopt($ch, CURLOPT_COOKIEJAR,  $cookie_file); //存储cookies
curl_exec($ch);
curl_close($ch);

//使用上面保存的cookies再次访问
$url = "http://www.google.com.hk/search?oe=utf8&ie=utf8&source=uds&hl=zh-CN&q=qq";
$ch = curl_init($url);
curl_setopt($ch, CURLOPT_HEADER, 0);
curl_setopt($ch, CURLOPT_RETURNTRANSFER, true);
curl_setopt($ch, CURLOPT_COOKIEFILE, $cookie_file); //使用上面获取的cookies
$response = curl_exec($ch);
curl_close($ch);

echo $response;
?>

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