Explanation of common error codes in php

Sometimes we often encounter page errors, but we don’t know what they mean. In this article, we will share with you the meanings of common error codes in PHP, hoping to help everyone.

• 200: The server responded normally.

• 304: The resource has not been modified in any way since the last request (this is usually used for the browser's caching mechanism, especially when using GET requests).

• 400: The requested resource cannot be found.

• 401: Insufficient permissions to access the resource.

• 403: No permission to access the resource.

• 404: The resource to be accessed does not exist.

• 405: The resource that needs to be accessed is prohibited.

• 407: The accessed resource requires proxy authentication.

• 414: The requested URL is too long.

• 500: Internal server error.

Complete the status code to avoid further searches:

100 - The client must continue to make the request

101 - The client requires the server to convert according to the request HTTP protocol version

200——Transaction successful

201——Prompt to know the URL of the new file

202——Accepted and processed, but the processing is not completed

203 - The return information is uncertain or incomplete

204 - The request was received, but the return information was empty

205 - The server completed the request, the user agent must reset the current Browsed files

206——The server has completed some users’ GET requests

300——The requested resources are available in multiple places

301——Delete request Data

302——The request data was found at other addresses

303——It is recommended that the customer access other URLs or access methods

304——The client has already executed GET, But the file has not changed

305-The requested resource must be obtained from the address specified by the server

306-The code used in the previous version of HTTP is no longer used in the current version

307——Declaration that the requested resource is temporarily deleted

400——Incorrect request, such as syntax error

401——Request authorization failed

402——Reserved Valid ChargeTo header response

403 - Request not allowed

404 - No file, query or URL found

405 - User defined method in the Request-Line field 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 be 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 resource no longer exists on the server and there is no further step Reference address

411 - Server rejects 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 server allows

414 - The requested resource URL is longer than the server allows Allowed length

415 - The requested resource does not support the request item format

416 - The request contains the Range request header field, there is no range indication value within the current request resource range, and the request does not Contains the If-Range request header field

417——The server does not meet the expectations specified in the request Expect header field. If it is a proxy server, it may be that the next-level server cannot satisfy 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

503 - Server Overload or maintenance suspension

504——The gateway is overloaded, the server uses another gate or service to respond to the user, and the waiting time setting value is longer

505——The server does not support or refuses to support the request The HTTP version specified in the header

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