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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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