install zeromq
wget http://download.zeromq.org/zeromq-4.0.5.tar.gz
tar -zxvf zeromq-4.0.5. tar.gz
cd zeromq-4.0.5
cd foreign/openpgm/
tar -zxvf libpgm-5.2.122~dfsg.tar.gz
./configure --prefix=/data/klj/zeromq --with-pgm =libpgm-5.2.122~dfsg
make
make install
Install php-zmq extension
git clone git://github.com/mkoppanen/php-zmq.git
cd php-zmq
/data/klj/ php/bin/phpize
./configure --with-php-c/klj/php/bin/php-config --with-zmq=/data/klj/zeromq
make && make install
Modify php.ini and restart
Error configure: error: Please reinstall the pkg-config distribution
wget http://pkgconfig.freedesktop.org/releases/pkg-config-0.28.tar.gz
tar -zxvf pkg-config-0.28.tar.gz
cd pkg-config-0.28
./configure --with-internal-glib
make && make install
ZMQ (hereinafter ZeroMQ is referred to as ZMQ) is a simple and easy-to-use transport layer, a socket library like a framework. It makes Socket programming simpler, more concise and more performant. Is a message processing queue library that elastically scales across multiple threads, cores, and host boxes. The clear goal of ZMQ is to "become part of the standard network protocol stack and then enter the Linux kernel
Feature introduction:
ZMQ is not like a message queue server in the traditional sense. In fact, it is not a server at all, it is more like It is a low-level network communication library that encapsulates the Socket API to abstract network communication, process communication and thread communication into a unified API interface. Disadvantages: ZeroMq does not support message persistence and is prone to data loss.
Supports 3 modes:
single queue mode
2. Publish-subscribe
subscription mode
3. PipeLine model
If we need to count the logs of each machine, we need to distribute the statistical tasks to each node machine on, finally collect the statistical results and make a summary
Reference blog:
ZMQ API reference manual: http://api.zeromq.org /
PHP user manual can be referred to: http://zguide.zeromq.org/php:all
ZMQ PHP Programming reference manual: http://php.zero.mq (unreachable)
ZeroMQ, the fastest message queue in history—ZMQ learning and research http://news.cnblogs.com/n/154000/
Here it is A large number of program examples are available for reference: https://github.com/imatix/zguide

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.


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