SQL statement to obtain all table information_PHP tutorial
exec sp_MSForEachTable
@precommand=N'
create table ##(
id int identity,
table name sysname,
number of fields int,
number of records int,
reserved Space Nvarchar(10),
used space varchar(10),
index used space varchar(10),
unused space varchar(10))',
@command1=N'insert # #(Table name, number of records, reserved space, used space, index used space, unused space) exec sp_spaceused ''?''
update ## set number of fields=(select count(*) from syscolumns where id= object_id(''?'')) where id=scope_identity()',
@postcommand=N'select * from ## order by id drop table ##'
How can you protect against Cross-Site Scripting (XSS) attacks related to sessions?Apr 23, 2025 am 12:16 AMTo protect the application from session-related XSS attacks, the following measures are required: 1. Set the HttpOnly and Secure flags to protect the session cookies. 2. Export codes for all user inputs. 3. Implement content security policy (CSP) to limit script sources. Through these policies, session-related XSS attacks can be effectively protected and user data can be ensured.
How can you optimize PHP session performance?Apr 23, 2025 am 12:13 AMMethods to optimize PHP session performance include: 1. Delay session start, 2. Use database to store sessions, 3. Compress session data, 4. Manage session life cycle, and 5. Implement session sharing. These strategies can significantly improve the efficiency of applications in high concurrency environments.
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How can you share sessions across subdomains?Apr 22, 2025 pm 05:21 PMHow to share a session between subdomains? Implemented by setting session cookies for common domain names. 1. Set the domain of the session cookie to .example.com on the server side. 2. Choose the appropriate session storage method, such as memory, database or distributed cache. 3. Pass the session ID through cookies, and the server retrieves and updates the session data based on the ID.
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