PHP采集利器:Snoopy 试用心得
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$url = "http://www.taoav.com"; include("snoopy.php"); $snoopy = new Snoopy; $snoopy->fetch($url); //获取所有内容 echo $snoopy->results; //显示结果 $snoopy->fetchtext //获取文本内容(去掉html代码) $snoopy->fetchlinks //获取链接 $snoopy->fetchform //获取表单2 表单提交
$formvars["username"] = "admin"; $formvars["pwd"] = "admin"; $action = "http://www.taoav.com";//表单提交地址 $snoopy->submit($action,$formvars);//$formvars为提交的数组 echo $snoopy->results; //获取表单提交后的 返回的结果 $snoopy->submittext; //提交后只返回 去除html的 文本 $snoopy->submitlinks;//提交后只返回 链接?既然已经提交的表单 那就可以做很多事情 接下来我们来伪装ip,伪装浏览器
$formvars["username"] = "admin"; $formvars["pwd"] = "admin"; $action = "http://www.taoav.com"; include "snoopy.php"; $snoopy = new Snoopy; $snoopy->cookies["PHPSESSID"] = 'fc106b1918bd522cc863f36890e6fff7'; //伪装sessionid $snoopy->agent = "(compatible; MSIE 4.01; MSN 2.5; AOL 4.0; Windows 98)"; //伪装浏览器 $snoopy->referer = "http://www.only4.cn"; //伪装来源页地址 http_referer $snoopy->rawheaders["Pragma"] = "no-cache"; //cache 的http头信息 $snoopy->rawheaders["X_FORWARDED_FOR"] = "127.0.0.101"; //伪装ip $snoopy->submit($action,$formvars); echo $snoopy->results;?
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原来我们可以伪装session 伪装浏览器 ,伪装ip, haha 可以做很多事情了。
$snoopy->proxy_host = "www.only4.cn"; $snoopy->proxy_port = "8080"; //使用代理 $snoopy->maxredirs = 2; //重定向次数 $snoopy->expandlinks = true; //是否补全链接 在采集的时候经常用到 // 例如链接为 /images/taoav.gif 可改为它的全链接 http://www.taoav.com/images/taoav.gif,这个地方其实可以在最后输出的时候用ereg_replace函数自己替换 $snoopy->maxframes = 5 //允许的最大框架数 //注意抓取框架的时候 $snoopy->results 返回的是一个数组 $snoopy->error //返回报错信息?上面的基本用法了解了,下面我就实例演示一次:
//echo var_dump($_SERVER); include("Snoopy.class.php"); $snoopy = new Snoopy; $snoopy->agent = "Mozilla/5.0 (Windows; U; Windows NT 5.1; zh- CN; rv:1.9.0.5) Gecko/2008120122 Firefox/3.0.5 FirePHP/0.2.1";//这项是浏览器信 息,前面你用什么浏览器查看cookie,就用那个浏览器的信息(ps:$_SERVER可以查看到浏览器的信息) $snoopy->referer = "http://bbs.phpchina.com/index.php"; $snoopy->expandlinks = true; $snoopy->rawheaders["COOKIE"]="__utmz=17229162.1227682761.29.7.utmccn=(referral)|utmcsr=phpchina.com|utmcct=/html/index.html|utmcmd=referral; cdbphpchina_smile=1D2D0D1; cdbphpchina_cookietime=2592000; __utma=233700831.1562900865.1227113506.1229613449.1231233266.16; __utmz=233700831.1231233266.16.8.utmccn=(referral)|utmcsr=localhost:8080|utmcct=/test3.php|utmcmd=referral; __utma=17229162.1877703507.1227113568.1231228465.1231233160.58; uchome_loginuser=sinopf; xscdb_cookietime=2592000; __utmc=17229162; __utmb=17229162; cdbphpchina_sid=EX5w1V; __utmc=233700831; cdbphpchina_visitedfid=17; cdbphpchinaO766uPYGK6OWZaYlvHSuzJIP22VpwEMGnPQAuWCFL9Fd6CHp2e%2FKw0x4bKz0N9lGk; xscdb_auth=8106rAyhKpQL49eMs%2FyhLBf3C6ClZ%2B2idSk4bExJwbQr%2BHSZrVKgqPOttHVr%2B6KLPg3DtWpTMUI4ttqNNVpukUj6ElM; cdbphpchina_onlineusernum=3721"; $snoopy->fetch("http://bbs.phpchina.com/forum-17-1.html"); $n=ereg_replace("href=\"","href=\"http://bbs.phpchina.com/",$snoopy->results ); echo ereg_replace("src=\"","src=\"http://bbs.phpchina.com/",$n); ?>?这是模拟登陆PHPCHINA论坛的过程,首先要查看自己浏览器的信
$_SERVER['HTTP_USER_AGENT']后边的内容复制下来,粘在$snoopy->agent的地方,然后就是要查看自己的
COOKIE了,用自己在论坛的账号登陆论坛后,在浏览器地址栏里输入
javascript:document.write(document.cookie),回车,就可以看到自己的cookie信息,复制粘贴
到$snoopy->rawheaders["COOKIE"]=的后边。(我的cookie信息为了安全起见已经删除了一段内容)
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Reasons for PHPSession failure include configuration errors, cookie issues, and session expiration. 1. Configuration error: Check and set the correct session.save_path. 2.Cookie problem: Make sure the cookie is set correctly. 3.Session expires: Adjust session.gc_maxlifetime value to extend session time.

Methods to debug session problems in PHP include: 1. Check whether the session is started correctly; 2. Verify the delivery of the session ID; 3. Check the storage and reading of session data; 4. Check the server configuration. By outputting session ID and data, viewing session file content, etc., you can effectively diagnose and solve session-related problems.

Multiple calls to session_start() will result in warning messages and possible data overwrites. 1) PHP will issue a warning, prompting that the session has been started. 2) It may cause unexpected overwriting of session data. 3) Use session_status() to check the session status to avoid repeated calls.

Configuring the session lifecycle in PHP can be achieved by setting session.gc_maxlifetime and session.cookie_lifetime. 1) session.gc_maxlifetime controls the survival time of server-side session data, 2) session.cookie_lifetime controls the life cycle of client cookies. When set to 0, the cookie expires when the browser is closed.

The main advantages of using database storage sessions include persistence, scalability, and security. 1. Persistence: Even if the server restarts, the session data can remain unchanged. 2. Scalability: Applicable to distributed systems, ensuring that session data is synchronized between multiple servers. 3. Security: The database provides encrypted storage to protect sensitive information.

Implementing custom session processing in PHP can be done by implementing the SessionHandlerInterface interface. The specific steps include: 1) Creating a class that implements SessionHandlerInterface, such as CustomSessionHandler; 2) Rewriting methods in the interface (such as open, close, read, write, destroy, gc) to define the life cycle and storage method of session data; 3) Register a custom session processor in a PHP script and start the session. This allows data to be stored in media such as MySQL and Redis to improve performance, security and scalability.

SessionID is a mechanism used in web applications to track user session status. 1. It is a randomly generated string used to maintain user's identity information during multiple interactions between the user and the server. 2. The server generates and sends it to the client through cookies or URL parameters to help identify and associate these requests in multiple requests of the user. 3. Generation usually uses random algorithms to ensure uniqueness and unpredictability. 4. In actual development, in-memory databases such as Redis can be used to store session data to improve performance and security.

Managing sessions in stateless environments such as APIs can be achieved by using JWT or cookies. 1. JWT is suitable for statelessness and scalability, but it is large in size when it comes to big data. 2.Cookies are more traditional and easy to implement, but they need to be configured with caution to ensure security.


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