http_status_bad_request (400) 
the request could not be processed by the server due to invalid syntax. 
因為語法不能被伺服器處理 
http_status_denied (401) 
the requested resource requires user authentication. 
請求資源命令必須被驗證（拒絕訪問） 
http_status_payment_req (402) 
not currently implemented in the http protocol. 
沒有完全實現http協議 
http_status_forbidden (403) 
the server understood the request, but is refusing to fulfill it. 
伺服器理解了請求，但是拒絕完成他 
http_status_not_found (404) 
the server has not found anything matching the requested uri (uniform resource identifier). 
沒有找到任何被指定的uri 

http_status_bad_method (405) 
the http verb used is not allowed. 
http動作不被允許 
http_status_none_acceptable (406) 
no resp acceptable to the client were found. 
應答沒有被客戶接受 
http_status_proxy_auth_req (407) 
proxy authentication required. 
代理必須被驗證 
http_status_request_timeout (408) 
the server timed out waiting for the request. 
伺服器在等待請求時中止了 
http_status_conflict (409) 
the request could not be completed due to a c with the current state of the resource. the user should resubmit with more information. 
請求不能被完成，問題是資源衝突。使用者應該進行調整 
http_status_gone (410) 
the requested resource is no l available at the server, and no forwarding address is known. 
請求的資源在伺服器上不再可用，而且沒有轉發地址 
http_status_length_required (411) 
the server refuses to accept the request without a defined c length. 
伺服器拒絕接受沒有定義目錄大小的請求 
http_status_precond_failed (412) 
the prec given in or more of the request header fields evaluated to false when it was tested on the server. 
當在伺服器上測試請求
 
標頭檔案放棄一個或者多個請求的條件 
http_status_request_too_large (413) 
the server is refusing to process a request because the request entity is larger than the server is willing or able to process. 
伺服器拒絕處理請求，原因是請求的大小超過伺服器能夠處理的大小 
http_status_uri_too_long (414) 
the server is refusing to service the request because the request uri (uniform resource identifier) is l than the server is willing to interpret. 
伺服器
 
拒絕服務，原因是請求的uri超過了伺服器能夠揭示的長度 
http_status_unsupported_media (415) 
the server is refusing to service the request because the entity of the request is in a format not supported by the requested resource for the requested method. 
伺服器拒絕服務，原因是請求格式不被支援