(PHP 5 >= 5.4.0)
http_response_code — Get or Set the HTTP response code
$response_code
] )If you pass no parameters then http_response_code will get the current status code. If you pass a parameter it will set the response code.
response_code
The optional response_code will set the response code.
<?php
http_response_code(404);
?>
The current response code. By default the return value is int(200).
Example #1 Examples using http_response_code()
<?php
// Get the current default response code
var_dump(http_response_code()); // int(200)
// Set our response code
http_response_code(404);
// Get our new response code
var_dump(http_response_code()); // int(404)
?>
以上例程会输出：