search
HomeBackend DevelopmentPHP TutorialSummary of PHP network operation functions, summary of PHP functions_PHP tutorial

Summary of PHP network operation functions, summary of PHP functions

checkdnsrr — Check DNS communication for the specified host (domain name) or IP address
closelog — Close system log link
define_syslog_variables — initialize all syslog related variables
dns_check_record — checkdnsrr alias
dns_get_mx — getmxrr alias
dns_get_record — Get the DNS record of the specified host
fsockopen — Open a network connection or a Unix socket connection
gethostbyaddr — Get the host name corresponding to the specified IP address
gethostbyname — Get the IP address corresponding to the specified host name
gethostbynamel — Get a series of IP addresses corresponding to the specified host name
gethostname — Get hostname
getmxrr — Get the MX record corresponding to the specified host name
getprotobyname — Get the protocol number corresponding to the specified protocol name
getprotobynumber — Get the protocol name corresponding to the specified protocol number
getservbyname — Get the port number corresponding to the specified Internet service and protocol
getservbyport — Get the Internet service corresponding to the specified protocol and port number
header_register_callback — Call a header function
header_remove — Remove previously set header
header — send a custom http message
headers_list — Returns a list of sent (or ready to be sent) response headers
headers_sent — Check if headers have been sent or where to send them
http_response_code — Get or set the HTTP response code
inet_ntop — Convert an encapsulated network address to dotted decimal representation
inet_pton — Convert a dotted decimal IP address into an encapsulated (in_addr) representation
ip2long — Convert an IPV4 string Internet protocol into a numeric format
long2ip — Convert an IPV4 number format into a string Internet Protocol
openlog — Open a connection to the system logger
pfsockopen — Open a persistent network connection or Unix socket connection.
setcookie — send cookie
setrawcookie — Send a raw cookie (cookie value is not URL-encoded)
socket_get_status — stream_get_meta_data alias
socket_set_blocking — stream_set_blocking alias
socket_set_timeout — stream_set_timeout alias
syslog — Generate a system log message

www.bkjia.comtruehttp: //www.bkjia.com/PHPjc/1000250.htmlTechArticleSummary of PHP network operation functions, summary of php functions checkdnsrr - perform DNS communication for the specified host (domain name) or IP address Check closelog - Close system log link define_syslog_vari...
Statement
The content of this article is voluntarily contributed by netizens, and the copyright belongs to the original author. This site does not assume corresponding legal responsibility. If you find any content suspected of plagiarism or infringement, please contact admin@php.cn
What data can be stored in a PHP session?What data can be stored in a PHP session?May 02, 2025 am 12:17 AM

PHPsessionscanstorestrings,numbers,arrays,andobjects.1.Strings:textdatalikeusernames.2.Numbers:integersorfloatsforcounters.3.Arrays:listslikeshoppingcarts.4.Objects:complexstructuresthatareserialized.

How do you start a PHP session?How do you start a PHP session?May 02, 2025 am 12:16 AM

TostartaPHPsession,usesession_start()atthescript'sbeginning.1)Placeitbeforeanyoutputtosetthesessioncookie.2)Usesessionsforuserdatalikeloginstatusorshoppingcarts.3)RegeneratesessionIDstopreventfixationattacks.4)Considerusingadatabaseforsessionstoragei

What is session regeneration, and how does it improve security?What is session regeneration, and how does it improve security?May 02, 2025 am 12:15 AM

Session regeneration refers to generating a new session ID and invalidating the old ID when the user performs sensitive operations in case of session fixed attacks. The implementation steps include: 1. Detect sensitive operations, 2. Generate new session ID, 3. Destroy old session ID, 4. Update user-side session information.

What are some performance considerations when using PHP sessions?What are some performance considerations when using PHP sessions?May 02, 2025 am 12:11 AM

PHP sessions have a significant impact on application performance. Optimization methods include: 1. Use a database to store session data to improve response speed; 2. Reduce the use of session data and only store necessary information; 3. Use a non-blocking session processor to improve concurrency capabilities; 4. Adjust the session expiration time to balance user experience and server burden; 5. Use persistent sessions to reduce the number of data read and write times.

How do PHP sessions differ from cookies?How do PHP sessions differ from cookies?May 02, 2025 am 12:03 AM

PHPsessionsareserver-side,whilecookiesareclient-side.1)Sessionsstoredataontheserver,aremoresecure,andhandlelargerdata.2)Cookiesstoredataontheclient,arelesssecure,andlimitedinsize.Usesessionsforsensitivedataandcookiesfornon-sensitive,client-sidedata.

How does PHP identify a user's session?How does PHP identify a user's session?May 01, 2025 am 12:23 AM

PHPidentifiesauser'ssessionusingsessioncookiesandsessionIDs.1)Whensession_start()iscalled,PHPgeneratesauniquesessionIDstoredinacookienamedPHPSESSIDontheuser'sbrowser.2)ThisIDallowsPHPtoretrievesessiondatafromtheserver.

What are some best practices for securing PHP sessions?What are some best practices for securing PHP sessions?May 01, 2025 am 12:22 AM

The security of PHP sessions can be achieved through the following measures: 1. Use session_regenerate_id() to regenerate the session ID when the user logs in or is an important operation. 2. Encrypt the transmission session ID through the HTTPS protocol. 3. Use session_save_path() to specify the secure directory to store session data and set permissions correctly.

Where are PHP session files stored by default?Where are PHP session files stored by default?May 01, 2025 am 12:15 AM

PHPsessionfilesarestoredinthedirectoryspecifiedbysession.save_path,typically/tmponUnix-likesystemsorC:\Windows\TemponWindows.Tocustomizethis:1)Usesession_save_path()tosetacustomdirectory,ensuringit'swritable;2)Verifythecustomdirectoryexistsandiswrita

See all articles

Hot AI Tools

Undresser.AI Undress

Undresser.AI Undress

AI-powered app for creating realistic nude photos

AI Clothes Remover

AI Clothes Remover

Online AI tool for removing clothes from photos.

Undress AI Tool

Undress AI Tool

Undress images for free

Clothoff.io

Clothoff.io

AI clothes remover

Video Face Swap

Video Face Swap

Swap faces in any video effortlessly with our completely free AI face swap tool!

Hot Tools

MantisBT

MantisBT

Mantis is an easy-to-deploy web-based defect tracking tool designed to aid in product defect tracking. It requires PHP, MySQL and a web server. Check out our demo and hosting services.

SublimeText3 Linux new version

SublimeText3 Linux new version

SublimeText3 Linux latest version

VSCode Windows 64-bit Download

VSCode Windows 64-bit Download

A free and powerful IDE editor launched by Microsoft

SublimeText3 Chinese version

SublimeText3 Chinese version

Chinese version, very easy to use

MinGW - Minimalist GNU for Windows

MinGW - Minimalist GNU for Windows

This project is in the process of being migrated to osdn.net/projects/mingw, you can continue to follow us there. MinGW: A native Windows port of the GNU Compiler Collection (GCC), freely distributable import libraries and header files for building native Windows applications; includes extensions to the MSVC runtime to support C99 functionality. All MinGW software can run on 64-bit Windows platforms.