HTTP 204 and 205 applications

The HTTP 204 (no content) indicates a successful response, but no data is returned, and the browser does not need to be refreshed or directed to a new page.

The HTTP 205 (reset content) indicates a successful response, resetting the page (form form) to facilitate the user's next entry.

When using AJAX, you can use the Status code HTTP 204来 instead of HTTP 200 to reduce redundant data transfers when you only need to know the success or failure of the response.

Example: Ajax submit user name, article ID, record user visited the article

$ (document). Ready (function () {  
  $.get ("api.php", {name: ' Fdipzone ', article_id: ');  
})

<?php  
      
$name = $_get[' name '];  
$article _id = $_get[' article_id '];  
      
Do sth  
      
header (' http/1.1 204 No Content ');  
      
? >

HTTP status Code header output:

/** * HTTP Protocol defined status codes * @param int $num/function Httpstatus ($num) {static $ht TP = Array (=> "http/1.1 Continue", => "http/1.1-switching Protocols", 2  
       => "http/1.1 OK", 201 => "http/1.1 201 Created", "=>",  203 => "http/1.1 203 non-authoritative Information", 204 => "http/1.1 204 No Content", 205 => "http/1.1 205 Reset Content", 206 => "http/1.1 206 Partial Content", => "http/1.1 E choices ", =>" http/1.1 moved Permanently ", 302 =>" http/1.1 302 Found ", 303 =&G T  
       "http/1.1 303", 304 => "http/1.1 304 not Modified", 305 => "http/1.1 305 use Proxy", 307 => "http/1.1 307 temporary Redirect", => "http/1.1 bad Request", 401 => "HTTP /1.1 401 Unauthorized", 402 =>" http/1.1 402 Payment Required ", 403 =>" http/1.1 403 forbidden ", 404 =>" HT tp/1.1 404 Not Found ', 405 => ' http/1.1 405 Method not allowed ', 406 => ' http/1.1 406 not Acceptab  
       Le ", 407 =>" http/1.1 407 Proxy Authentication Required ", 408 =>" http/1.1 408 Request time-out ", 409 => "http/1.1 409 Conflict", 410 => "http/1.1 410 Gone", 411 => "http/1.1 411 lengt H Required ", 412 =>" http/1.1 412 precondition Failed ", 413 =>" http/1.1 413 Request Entity Too La  
       Rge ", 414 =>" http/1.1 414 request-uri Too Large ", 415 =>" http/1.1 415 unsupported Media Type ",  
       416 => "http/1.1 416 requested range not satisfiable", 417 => "http/1.1 417, expectation Failed", => "http/1.1 Internal Server Error", 501 => "http/1.1 501 Not implemented", 502 =&G T "http/1.1 502 Bad GateWAY ", 503 =>" http/1.1 503 Service Unavailable ", 504 =>" http/1.1 504 Gateway Time-out "  
         
   );  
Header ($http [$num]); }