php 网络爬虫
请问有没有用php写网络爬虫的电子书或者视频教程啊?想自学下,请高手指教...回复讨论(解决方案)
网络爬虫是啥
你是说想用php写一个类似于百度蜘蛛的那种东西吗?
呵呵……哦哦哦哦哦
php开发爬虫效率太低了吧
下载一个sphider,自己琢磨它的代码吧。
http://www.sphider.eu/about.php
下载一个sphider,自己琢磨它的代码吧。
http://www.sphider.eu/about.php
谢谢啊
这个难度很大吧。。。。
还是python给力
用python吧,so easy
上周刚用python爬了淘女郎几百万张图
难度大。。
推荐还是python吧
不是他的强项啊 没多线程。。爬虫很痛苦。
不是他的强项啊 没多线程。。爬虫很痛苦。
用curl multi,多线程
http://php.net/manual/en/function.curl-multi-init.php
先准备点硬盘吧
python 这个把 ,强烈支持。
有一个开源的php工具叫phpquery,被很多人用来抓取网页,很方便!
有一个开源的php工具叫phpquery,被很多人用来抓取网页,很方便!
万分感谢...
1,效率低
2,能不能写得好也要看对各种协议的立即
有一个开源的php工具叫phpquery,被很多人用来抓取网页,很方便!
万分感谢...
http://tanteng.sinaapp.com/2013/10/phpquery/
有一个开源的php工具叫phpquery,被很多人用来抓取网页,很方便!
万分感谢...
http://tanteng.sinaapp.com/2013/10/phpquery/

PHPsessionstrackuserdataacrossmultiplepagerequestsusingauniqueIDstoredinacookie.Here'showtomanagethemeffectively:1)Startasessionwithsession_start()andstoredatain$_SESSION.2)RegeneratethesessionIDafterloginwithsession_regenerate_id(true)topreventsessi

In PHP, iterating through session data can be achieved through the following steps: 1. Start the session using session_start(). 2. Iterate through foreach loop through all key-value pairs in the $_SESSION array. 3. When processing complex data structures, use is_array() or is_object() functions and use print_r() to output detailed information. 4. When optimizing traversal, paging can be used to avoid processing large amounts of data at one time. This will help you manage and use PHP session data more efficiently in your actual project.

The session realizes user authentication through the server-side state management mechanism. 1) Session creation and generation of unique IDs, 2) IDs are passed through cookies, 3) Server stores and accesses session data through IDs, 4) User authentication and status management are realized, improving application security and user experience.

Tostoreauser'snameinaPHPsession,startthesessionwithsession_start(),thenassignthenameto$_SESSION['username'].1)Usesession_start()toinitializethesession.2)Assigntheuser'snameto$_SESSION['username'].Thisallowsyoutoaccessthenameacrossmultiplepages,enhanc

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.


Hot AI Tools

Undresser.AI Undress
AI-powered app for creating realistic nude photos

AI Clothes Remover
Online AI tool for removing clothes from photos.

Undress AI Tool
Undress images for free

Clothoff.io
AI clothes remover

Video Face Swap
Swap faces in any video effortlessly with our completely free AI face swap tool!

Hot Article

Hot Tools

Notepad++7.3.1
Easy-to-use and free code editor

PhpStorm Mac version
The latest (2018.2.1) professional PHP integrated development tool

SAP NetWeaver Server Adapter for Eclipse
Integrate Eclipse with SAP NetWeaver application server.

MinGW - Minimalist GNU for Windows
This project is in the process of being migrated to osdn.net/projects/mingw, you can continue to follow us there. MinGW: A native Windows port of the GNU Compiler Collection (GCC), freely distributable import libraries and header files for building native Windows applications; includes extensions to the MSVC runtime to support C99 functionality. All MinGW software can run on 64-bit Windows platforms.

VSCode Windows 64-bit Download
A free and powerful IDE editor launched by Microsoft
