In-depth explanation of HTTP response status code cheat sheet

Home

Backend Development

PHP Tutorial

In-depth explanation of HTTP response status code cheat sheet_PHP tutorial

WBOYWBOYWBOYWBOYWBOYWBOYWBOYWBOYWBOYWBOYWBOYWBOYWB

Jul 21, 2016 pm 03:07 PM

chttpresponseserverurlinformationresponseheadexaminego deepstateofDetailed explanation

HTTP header information check URL HTTP Server Response Code Checker

Common response status codes

1**: The request is received, continue processing
2**: The operation is successfully received, analyzed and accepted
3**: This request must be processed further
4**: The request contains An incorrect syntax or failure to complete
5**: The server failed to perform a fully valid request

100 - The client must continue to make requests
101 - The client requires the server to convert the HTTP protocol version according to the request

200——Transaction successful
201——Prompt to know the URL of the new file
202——Accepted and processed, but the processing is not completed
203——Return information is uncertain or incomplete
204——Request received, but the return information is empty
205——The server has completed the request, the user agent must reset the currently browsed files
206——The server has completed some users’ GET requests

300 - The requested resource is available in multiple places
301 - Delete the request data
302 - The request data was found at another address
303 - Recommend the customer to visit other URLs or access methods
304 - The client has performed GET, but the file has not changed
305 - The requested resource must be obtained from the address specified by the server
306 - Code used in the previous version of HTTP, current version No longer used in
307 - Declaring that the requested resource is temporarily deleted

400 - Bad request, such as syntax error
401 - Request authorization failed
402 - Retain valid ChargeTo header response
403 - Request not allowed
404 - No file found , query or URl
405 - The method defined by the user in the Request-Line field is not allowed
406 - According to the Accept drag sent by the user, the requested resource is not accessible
407 - Similar to 401, the user must first Authorized on the proxy server
408 - The client did not complete the request within the user-specified time
409 - The request cannot be completed for the current resource status
410 - This is no longer available on the server Resource with no further reference
411 - The server rejected the user-defined Content-Length attribute request
412 - One or more request header fields are incorrect in the current request
413 - The requested resource Larger than the size allowed by the server
414 - The requested resource URL is longer than the length allowed by the server
415 - The requested resource does not support the requested item format
416 - The request contains the Range request header field, which is in the current request There is no range indication value in the resource range, and the request
does not contain the If-Range request header field
417 - the server does not meet the expectations specified by the request Expect header field. If it is a proxy server, it may be the next
one The level server cannot fulfill the request

500 - The server generated an internal error
501 - The server does not support the requested function
502 - The server is temporarily unavailable, sometimes to prevent system overload from occurring
503 - The server is overloaded or suspended Maintenance
504 - The gateway is overloaded, the server uses another gateway or service to respond to the user, and the waiting time is set to a long value
505 - The server does not support or refuses to support the HTTP version specified in the request header

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

How do you set the session cookie parameters in PHP?Apr 22, 2025 pm 05:33 PM

Setting session cookie parameters in PHP can be achieved through the session_set_cookie_params() function. 1) Use this function to set parameters, such as expiration time, path, domain name, security flag, etc.; 2) Call session_start() to make the parameters take effect; 3) Dynamically adjust parameters according to needs, such as user login status; 4) Pay attention to setting secure and httponly flags to improve security.

What is the main purpose of using sessions in PHP?Apr 22, 2025 pm 05:25 PM

The main purpose of using sessions in PHP is to maintain the status of the user between different pages. 1) The session is started through the session_start() function, creating a unique session ID and storing it in the user cookie. 2) Session data is saved on the server, allowing data to be passed between different requests, such as login status and shopping cart content.

How can you share sessions across subdomains?Apr 22, 2025 pm 05:21 PM

How 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.

How does using HTTPS affect session security?Apr 22, 2025 pm 05:13 PM

HTTPS significantly improves the security of sessions by encrypting data transmission, preventing man-in-the-middle attacks and providing authentication. 1) Encrypted data transmission: HTTPS uses SSL/TLS protocol to encrypt data to ensure that the data is not stolen or tampered during transmission. 2) Prevent man-in-the-middle attacks: Through the SSL/TLS handshake process, the client verifies the server certificate to ensure the connection legitimacy. 3) Provide authentication: HTTPS ensures that the connection is a legitimate server and protects data integrity and confidentiality.

The Continued Use of PHP: Reasons for Its EnduranceApr 19, 2025 am 12:23 AM

What’s still popular is the ease of use, flexibility and a strong ecosystem. 1) Ease of use and simple syntax make it the first choice for beginners. 2) Closely integrated with web development, excellent interaction with HTTP requests and database. 3) The huge ecosystem provides a wealth of tools and libraries. 4) Active community and open source nature adapts them to new needs and technology trends.

PHP and Python: Exploring Their Similarities and DifferencesApr 19, 2025 am 12:21 AM

PHP and Python are both high-level programming languages that are widely used in web development, data processing and automation tasks. 1.PHP is often used to build dynamic websites and content management systems, while Python is often used to build web frameworks and data science. 2.PHP uses echo to output content, Python uses print. 3. Both support object-oriented programming, but the syntax and keywords are different. 4. PHP supports weak type conversion, while Python is more stringent. 5. PHP performance optimization includes using OPcache and asynchronous programming, while Python uses cProfile and asynchronous programming.

PHP and Python: Different Paradigms ExplainedApr 18, 2025 am 12:26 AM

PHP is mainly procedural programming, but also supports object-oriented programming (OOP); Python supports a variety of paradigms, including OOP, functional and procedural programming. PHP is suitable for web development, and Python is suitable for a variety of applications such as data analysis and machine learning.

PHP and Python: A Deep Dive into Their HistoryApr 18, 2025 am 12:25 AM

PHP originated in 1994 and was developed by RasmusLerdorf. It was originally used to track website visitors and gradually evolved into a server-side scripting language and was widely used in web development. Python was developed by Guidovan Rossum in the late 1980s and was first released in 1991. It emphasizes code readability and simplicity, and is suitable for scientific computing, data analysis and other fields.

See all articles