本人是java专业的，结果去搞了2年网络集成，路由器交换机啥的。想转行学php或者ios， 觉得ios工资高点，但是觉得ios发展前景不是很明朗，万一苹果不行了 或者html5流行起来 一大波前端的都可以做web app了。native的应用需求肯定没那么多。 做php后端的话 可以往架构发展 自己懂点网络架构 也有点优势。 求大神来指点指点！！！
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这个时代优先淘汰止步不前，犹豫不决踌躇不前的人，而不是积极上进不断学习的人。当犹豫派还在想怎么迈第一步的时候，实干派已经知道应该走那条路，怎么走，甚至怎么走才能的更快了。 ios吧，也就是oc 不要去想苹果倒闭后怎么怎么滴 ，只管去学就是了。 php是世界上最好的语言 我也在想娶范冰冰好呢还是娶唐嫣好呢…纯TX，题主自动忽略吧
What is the difference between unset() and session_destroy()?May 04, 2025 am 12:19 AMThedifferencebetweenunset()andsession_destroy()isthatunset()clearsspecificsessionvariableswhilekeepingthesessionactive,whereassession_destroy()terminatestheentiresession.1)Useunset()toremovespecificsessionvariableswithoutaffectingthesession'soveralls
What is sticky sessions (session affinity) in the context of load balancing?May 04, 2025 am 12:16 AMStickysessionsensureuserrequestsareroutedtothesameserverforsessiondataconsistency.1)SessionIdentificationassignsuserstoserversusingcookiesorURLmodifications.2)ConsistentRoutingdirectssubsequentrequeststothesameserver.3)LoadBalancingdistributesnewuser
What are the different session save handlers available in PHP?May 04, 2025 am 12:14 AMPHPoffersvarioussessionsavehandlers:1)Files:Default,simplebutmaybottleneckonhigh-trafficsites.2)Memcached:High-performance,idealforspeed-criticalapplications.3)Redis:SimilartoMemcached,withaddedpersistence.4)Databases:Offerscontrol,usefulforintegrati
What is a session in PHP, and why are they used?May 04, 2025 am 12:12 AMSession in PHP is a mechanism for saving user data on the server side to maintain state between multiple requests. Specifically, 1) the session is started by the session_start() function, and data is stored and read through the $_SESSION super global array; 2) the session data is stored in the server's temporary files by default, but can be optimized through database or memory storage; 3) the session can be used to realize user login status tracking and shopping cart management functions; 4) Pay attention to the secure transmission and performance optimization of the session to ensure the security and efficiency of the application.
Explain the lifecycle of a PHP session.May 04, 2025 am 12:04 AMPHPsessionsstartwithsession_start(),whichgeneratesauniqueIDandcreatesaserverfile;theypersistacrossrequestsandcanbemanuallyendedwithsession_destroy().1)Sessionsbeginwhensession_start()iscalled,creatingauniqueIDandserverfile.2)Theycontinueasdataisloade
What is the difference between absolute and idle session timeouts?May 03, 2025 am 12:21 AMAbsolute session timeout starts at the time of session creation, while an idle session timeout starts at the time of user's no operation. Absolute session timeout is suitable for scenarios where strict control of the session life cycle is required, such as financial applications; idle session timeout is suitable for applications that want users to keep their session active for a long time, such as social media.
What steps would you take if sessions aren't working on your server?May 03, 2025 am 12:19 AMThe server session failure can be solved through the following steps: 1. Check the server configuration to ensure that the session is set correctly. 2. Verify client cookies, confirm that the browser supports it and send it correctly. 3. Check session storage services, such as Redis, to ensure that they are running normally. 4. Review the application code to ensure the correct session logic. Through these steps, conversation problems can be effectively diagnosed and repaired and user experience can be improved.
What is the significance of the session_start() function?May 03, 2025 am 12:18 AMsession_start()iscrucialinPHPformanagingusersessions.1)Itinitiatesanewsessionifnoneexists,2)resumesanexistingsession,and3)setsasessioncookieforcontinuityacrossrequests,enablingapplicationslikeuserauthenticationandpersonalizedcontent.
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