Php/docs/function.headers-list
headers_list
(PHP 5, PHP 7)
headers_list — Returns a list of response headers sent (or ready to send)
Description
headers_list ( ) : array
headers_list() will return a list of headers to be sent to the browser / client. To determine whether or not these headers have been sent yet, use headers_sent().
Return Values
Returns a numerically indexed array of headers.
Examples
Example #1 Examples using headers_list()
<?php/* setcookie() will add a response header on its own */setcookie('foo', 'bar');/* Define a custom response header This will be ignored by most clients */header("X-Sample-Test: foo");/* Specify plain text content in our response */header('Content-type: text/plain');/* What headers are going to be sent? */var_dump(headers_list());?>
The above example will output:
array(4) {
[0]=>
string(23) "X-Powered-By: PHP/5.1.3"
[1]=>
string(19) "Set-Cookie: foo=bar"
[2]=>
string(18) "X-Sample-Test: foo"
[3]=>
string(24) "Content-type: text/plain"
}
Notes
Note:
Headers will only be accessible and output when a SAPI that supports them is in use.
See Also
- headers_sent() - Checks if or where headers have been sent
- header() - Send a raw HTTP header
- setcookie() - Send a cookie
- apache_response_headers() - Fetch all HTTP response headers
- http_response_code() - Get or Set the HTTP response code
