黄色感叹号(有冲突):
--这是有冲突了,冲突就是说你对某个文件进行了修改,别人也对这个文件进行了修改,别人抢在你提交之前先提交了,这时你再提交就会被提示发生冲突,而不允许你提交,防止你的提交覆盖了别人的修改。要解决冲突,如果你确认你的修改是无效的,则用TSVN还原你的修改就行了;如果认为你的修改是正确的,别人的提交是无效的,那么用TSVN先标记为“解决冲突”,然后就可以提交了;如果你认为你的修改和别人的修改都有一部分是有效的,那么你就把别人的修改手动合并到你的修改中,然后使用TSVN标注为“解决冲突”,然后就可以提交了。进入文件夹,寻找有黄色感叹号的文件,这些文件就是发生冲突的地方,根据实际情况处理冲突
米字号(有本地修改代码):
--这是说明你有未提交的本地代码。
问好(新加入的资源):
--这说明该文件是项目中新增文件资源,新增资源可以是文件、图片、代码等。
红色感叹号(本地代码与库没有保持一致):
--这说明本地代码跟库上没有保持一致,如果用户想修复,可以将带红色感叹号图标文件删除,直接update即可。
灰色向右箭头(本地修改过)
--本地代码没有及时上库。
蓝色向左箭头(SVN上修改过)
--记得更新代码后修改,提交前跟svn对比习惯。
灰色向右且中间有个加号的箭头(本地比SVN上多出的文件)
--修改完记得跟svn保持一致
蓝色向左且中间有个加号的箭头(SVN上比本地多出的文件)
--删除该文件后,再次更新,将svn上文件全部更新下来。
灰色向右且中间有个减号的箭头(本地删除了,而SVN上未删除的文件)
--也就是说你删除确认后,一定要记得上库,跟svn保持一致
蓝色向左且中间有个减号的箭头(SVN上删除了,而本地未删除的文件)
--比对svn库上代码,确定需要删除后,更新svn(删除无用代码)。
红色双向箭头(SVN上修改过,本地也修改过的文件 )
--这个表示本地和svn上都修改过,最好就是把本地修改合并到svn,修改代码前最后先更新。
想要获得成功,首先要自己相信自己,再者要赢得周围朋友的信任!

In PHP, you can use session_status() or session_id() to check whether the session has started. 1) Use the session_status() function. If PHP_SESSION_ACTIVE is returned, the session has been started. 2) Use the session_id() function, if a non-empty string is returned, the session has been started. Both methods can effectively check the session state, and choosing which method to use depends on the PHP version and personal preferences.

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Load balancing affects session management, but can be resolved with session replication, session stickiness, and centralized session storage. 1. Session Replication Copy session data between servers. 2. Session stickiness directs user requests to the same server. 3. Centralized session storage uses independent servers such as Redis to store session data to ensure data sharing.

Sessionlockingisatechniqueusedtoensureauser'ssessionremainsexclusivetooneuseratatime.Itiscrucialforpreventingdatacorruptionandsecuritybreachesinmulti-userapplications.Sessionlockingisimplementedusingserver-sidelockingmechanisms,suchasReentrantLockinJ

Alternatives to PHP sessions include Cookies, Token-based Authentication, Database-based Sessions, and Redis/Memcached. 1.Cookies manage sessions by storing data on the client, which is simple but low in security. 2.Token-based Authentication uses tokens to verify users, which is highly secure but requires additional logic. 3.Database-basedSessions stores data in the database, which has good scalability but may affect performance. 4. Redis/Memcached uses distributed cache to improve performance and scalability, but requires additional matching

Sessionhijacking refers to an attacker impersonating a user by obtaining the user's sessionID. Prevention methods include: 1) encrypting communication using HTTPS; 2) verifying the source of the sessionID; 3) using a secure sessionID generation algorithm; 4) regularly updating the sessionID.


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