In-depth explanation of HTTP response status code lookup table _ php instance

This article provides a detailed analysis of the HTTP Response status Code lookup table. For more information, see HTTP header information check url http Server Response Code Checker.

Common response status codes

1 **: request received, continue processing
2 **: The operation is successfully received, analyzed, and accepted.
3 **: the request must be further processed.
4 **: The request contains an error syntax or cannot be completed
5 **: the server failed to execute a fully valid request.

100 -- the customer must continue to send the request
101 -- the client requests 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 -- accept and process, but not complete
203 -- the returned information is uncertain or incomplete
204 -- the request is received, but the returned information is null.
205 -- when the server completes the request, the user agent must reset the file that has been browsed.
206 -- the server has completed some users' GET requests

300 -- the requested resources can be obtained in multiple places
301 -- Delete request data
302 -- request data found at other addresses
303 -- we recommend that you access other URLs or access methods.
304 -- the client has executed 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 HTTP of the previous version, which is not used in the current version
307 -- declaring temporary deletion of requested resources

400 -- incorrect request, such as syntax error
401 -- authorization request failed
402 -- retain valid ChargeTo header response
403 -- the request is not allowed
404 -- no file, query, or URl found
405 -- the method defined in the Request-Line field is not allowed.
406 -- the requested resource is inaccessible due to the user's Accept drag.
407 -- similar to 401, the user must first be authorized on the Proxy Server
408 -- the client did not complete the request within the specified time
409 -- the request cannot be completed due to the current resource status
410 -- this resource is no longer available on the server and there is no further reference address
411 -- the server rejects the User-Defined Content-Length attribute request
412 -- one or more request header fields are incorrect in the current request
413 -- the requested resource is 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 format of the requested project
416 -- The request contains the Range request header field, which has no range indication value in the current request resource Range.
It does not contain the If-Range request header field.
417 -- the server does not meet the expectation specified by the request's CT header field. If it is a proxy server, it may be
The first-level server cannot meet the request

500 -- Internal error occurred on the server
501 -- the server does not support the requested function
502 -- the server is temporarily unavailable, sometimes to prevent system overload
503 -- server overload or service suspension
504 -- the gateway is overloaded. The server uses another gateway or service to respond to the user. The waiting time is long.
505 -- the server does not support or reject the specified HTTP version in the Request Header