1、用PHP打印出前一天的时间格式是2006-5-10 22:21:21(2分)
2、echo(),print(),print_r()的区别(3分)
3、能够使HTML和PHP分离开使用的模板(1分)
4、使用哪些工具进行版本控制?(1分)
5、如何实现字符串翻转?(3分)
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6、优化MYSQL数据库的方法。(4分,多写多得)
7、PHP的意思(送1分)
8、MYSQL取得当前时间的函数是?,格式化日期的函数是(2分)
9、实现中文字串截取无乱码的方法。(3分)
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10、您是否用过版本控制软件? 如果有您用的版本控制软件的名字是?(1分)
11、您是否用过模板引擎? 如果有您用的模板引擎的名字是?(1分)
12、请简单阐述您最得意的开发之作(4分)
13、对于大流量的网站,您采用什么样的方法来解决访问量问题?(4分)
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14、用PHP写出显示客户端IP与服务器IP的代码1分)
15、语句include和require的区别是什么?为避免多次包含同一文件,可用(?)语句代替它们? (2分)
16、如何修改SESSION的生存时间(1分).
17、有一个网页地址, 比如PHP研究室主页: http://www.php100.com,如何得到它的内容?($1分)
18、在HTTP 1.0中,状态码401的含义是(?);如果返回“找不到文件”的提示,则可用 header 函数,其语句为(?);(2分)
19、在PHP中,heredoc是一种特殊的字符串,它的结束标志必须?(1分)
20、谈谈asp,php,jsp的优缺点(1分)
21、谈谈对mvc的认识(1分)
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22、写出发贴数最多的十个人名字的SQL,利用下表:members(id,username,posts,pass,email)(2分)
23. 请说明php中传值与传引用的区别。什么时候传值什么时候传引用?(2分)
24. 在PHP中error_reporting这个函数有什么作用? (1分)
25. 请写一个函数验证电子邮件的格式是否正确 (2分)
26. 简述如何得到当前执行脚本路径,包括所得到参数。(2分)
27.如何修改SESSION的生存时间. (1分)
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28、JS表单弹出对话框函数是?获得输入焦点函数是? (2分)
29、JS的转向函数是?怎么引入一个外部JS文件?(2分)
30、foo()和@foo()之间有什么区别?(1分)
31、如何声明一个名为”myclass”的没有方法和属性的类? (1分)
32、如何实例化一个名为”myclass”的对象?(1分)
33、你如何访问和设置一个类的属性? (2分)
34、mysql_fetch_row() 和mysql_fetch_array之间有什么区别? (1分)
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35、GD库是做什么用的? (1分)
36、指出一些在PHP输入一段HTML代码的办法。(1分)
37、下面哪个函数可以打开一个文件,以对文件进行读和写操作?(1分)
(a) fget() (b) file_open() (c) fopen() (d) open_file()
38、下面哪个选项没有将 john 添加到users 数组中? (1分)
(a) $users[] = ‘john';
(b) array_add($users,'john');
(c) array_push($users,‘john');
(d) $users ||= ‘john';
39、下面的程序会输入是否?(1分)
$num = 10;
function multiply(){
$num = $num * 10;
}
multiply();
echo $num;
?>

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.

Sessionsarevitalinwebapplications,especiallyfore-commerceplatforms.Theymaintainuserdataacrossrequests,crucialforshoppingcarts,authentication,andpersonalization.InFlask,sessionscanbeimplementedusingsimplecodetomanageuserloginsanddatapersistence.

Managing concurrent session access in PHP can be done by the following methods: 1. Use the database to store session data, 2. Use Redis or Memcached, 3. Implement a session locking strategy. These methods help ensure data consistency and improve concurrency performance.

PHPsessionshaveseverallimitations:1)Storageconstraintscanleadtoperformanceissues;2)Securityvulnerabilitieslikesessionfixationattacksexist;3)Scalabilityischallengingduetoserver-specificstorage;4)Sessionexpirationmanagementcanbeproblematic;5)Datapersis

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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