- getallheaders
- Parameters
- Return Values
- Changelog
- Examples
- See Also
- User Contributed Notes 9 notes
- How to print all information from an HTTP request to the screen, in PHP
- 8 Answers 8
- How can I get PHP to display the headers it received from a browser?
- php : Show the headers received from the browser
- 4 Answers 4
- Update
getallheaders
This function is an alias for apache_request_headers() . Please read the apache_request_headers() documentation for more information on how this function works.
Parameters
This function has no parameters.
Return Values
An associative array of all the HTTP headers in the current request, or false on failure.
Changelog
| Version | Description |
|---|---|
| 7.3.0 | This function became available in the FPM SAPI. |
Examples
Example #1 getallheaders() example
foreach ( getallheaders () as $name => $value ) echo » $name : $value \n» ;
>
See Also
User Contributed Notes 9 notes
it could be useful if you using nginx instead of apache
if (! function_exists ( ‘getallheaders’ ))
<
function getallheaders ()
<
$headers = [];
foreach ( $_SERVER as $name => $value )
<
if ( substr ( $name , 0 , 5 ) == ‘HTTP_’ )
<
$headers [ str_replace ( ‘ ‘ , ‘-‘ , ucwords ( strtolower ( str_replace ( ‘_’ , ‘ ‘ , substr ( $name , 5 )))))] = $value ;
>
>
return $headers ;
>
>
?>
A simple approach to dealing with case insenstive headers (as per RFC2616) is via the built in array_change_key_case() function:
$headers = array_change_key_case(getallheaders(), CASE_LOWER);
There’s a polyfill for this that can be downloaded or installed via composer:
Beware that RFC2616 (HTTP/1.1) defines header fields as case-insensitive entities. Therefore, array keys of getallheaders() should be converted first to lower- or uppercase and processed such.
dont forget to add the content_type and content_lenght if your are uploading file:
function emu_getallheaders () <
foreach ( $_SERVER as $name => $value )
<
if ( substr ( $name , 0 , 5 ) == ‘HTTP_’ )
<
$name = str_replace ( ‘ ‘ , ‘-‘ , ucwords ( strtolower ( str_replace ( ‘_’ , ‘ ‘ , substr ( $name , 5 )))));
$headers [ $name ] = $value ;
> else if ( $name == «CONTENT_TYPE» ) <
$headers [ «Content-Type» ] = $value ;
> else if ( $name == «CONTENT_LENGTH» ) <
$headers [ «Content-Length» ] = $value ;
>
>
return $headers ;
>
?>
chears magno c. heck
apache_request_headers replicement for nginx
if (! function_exists ( ‘apache_request_headers’ )) <
function apache_request_headers () <
foreach( $_SERVER as $key => $value ) <
if ( substr ( $key , 0 , 5 )== «HTTP_» ) <
$key = str_replace ( » » , «-» , ucwords ( strtolower ( str_replace ( «_» , » » , substr ( $key , 5 )))));
$out [ $key ]= $value ;
>else <
$out [ $key ]= $value ;
>
>
return $out ;
>
>
?>
warning, at least on php-fpm 8.2.1 and nginx, getallheaders() will return «Content-Length» and «Content-Type» both containing emptystring, even for requests without any of these 2 headers. you can do something like
retrieve token from header:
function getAuthorizationHeader () $headers = null ;
if (isset( $_SERVER [ ‘Authorization’ ])) $headers = trim ( $_SERVER [ «Authorization» ]);
>
elseif (isset( $_SERVER [ ‘HTTP_AUTHORIZATION’ ])) $headers = trim ( $_SERVER [ «HTTP_AUTHORIZATION» ]);
>
elseif ( function_exists ( ‘apache_request_headers’ )) $requestHeaders = apache_request_headers ();
$requestHeaders = array_combine ( array_map ( ‘ucwords’ , array_keys ( $requestHeaders )), array_values ( $requestHeaders ));
if (isset( $requestHeaders [ ‘Authorization’ ])) $headers = trim ( $requestHeaders [ ‘Authorization’ ]);
>
>
function getBearerToken () $headers = getAuthorizationHeader ();
if (!empty( $headers )) if ( preg_match ( ‘/Bearer\s(\S+)/’ , $headers , $matches )) return $matches [ 1 ];
>
>
Due to the else part.
>else <
$out[$key]=$value;
All server Variables are added to the headers list, and that’s not the desired outcome.
- Apache Functions
- apache_child_terminate
- apache_get_modules
- apache_get_version
- apache_getenv
- apache_lookup_uri
- apache_note
- apache_request_headers
- apache_response_headers
- apache_setenv
- getallheaders
- virtual
How to print all information from an HTTP request to the screen, in PHP
I need some PHP code that does a dump of all the information in an HTTP request, including headers and the contents of any information included in a POST request. Basically, a diagnostic tool that spits out exactly what I send to a server. Does anyone have some code that does this?
Nowadays both Chrome and Firefox let you easily view network traffic (including headers for requests and responses) in their in-browser developer tools. No need to fiddle with printing headers manually in PHP.
@dimo414, there are cases where what reaches the server is different from what the browser sends, e.g. when the connection goes through proxies or CDNs.
8 Answers 8
print_r(apache_request_headers());I think the op wanted HEADERS. This, by the doc is associative array that by default contains the contents of $_GET, $_POST and $_COOKIE . So for a simple GET request, it’s empty.
Well, you can read the entirety of the POST body like so
echo file_get_contents( 'php://input' );And, assuming your webserver is Apache, you can read the request headers like so
$requestHeaders = apache_request_headers();apache_request_headers() , works also for Php’s built in server. Despite the name. It has an alias getallheaders()
A bit of massaging would be required to get everything in the order you want, and to exclude the variables you are not interested in, but should give you a start.
Headers are in $_SERVER . Basic pretty print : foreach($_SERVER as $key => $val) echo($key . «=>» . $val . «
«; .Nobody mentioned how to dump HTTP headers correctly under any circumstances.
From CGI specification rfc3875, section 4.1.18:
Meta-variables with names beginning with «HTTP_» contain values read from the client request header fields, if the protocol used is HTTP. The HTTP header field name is converted to upper case, has all occurrences of «-» replaced with «» and has «HTTP» prepended to give the meta-variable name.
foreach ($_SERVER as $key => $value) < if (strpos($key, 'HTTP_') === 0) < $chunks = explode('_', $key); $header = ''; for ($i = 1; $y = sizeof($chunks) - 1, $i < $y; $i++) < $header .= ucfirst(strtolower($chunks[$i])).'-'; >$header .= ucfirst(strtolower($chunks[$i])).': '.$value; echo $header.'
'; > >How can I get PHP to display the headers it received from a browser?
you can use getallheaders() to get an array of all HTTP headers sent.
$headers = getallheaders(); foreach($headers as $key=>$val)< echo $key . ': ' . $val . '
'; >Every HTTP request header field is in $_SERVER (except Cookie ) and the key begins with HTTP_ . If you’re using Apache, you can also try apache_request_headers .
@dskanth Yes, $_COOKIE will contain the already parsed cookies sent by the client. But there won’t be a $_SERVER[‘HTTP_COOKIE’] .
@Gumbo, How is this diff from getallheaders ? Are there some headers that are stripped for the latter?
@Pacerier getallheaders is part of a server specific extension, thus it might be available only when using Apache module. On the other hand $_SERVER is always available (working as web-server).
Usage: echo json_encode(getallheaders());
If above function does not exist (old PHP or nginx) you can use this as a fallback:
Look at the $_SERVER variable to see what it contains. The linked manual page has a lot of useful information, but also simply do a var_dump on it to see what’s actually in it. Many of the entries will or won’t be filled in, depending on what the client decides to do, and odd quirks of PHP. Looking at the one on my local server, there is also a $_SERVER[«ALL_HTTP»] entries that just lists them all as a string, but apparently this isn’t standard, as it isn’t listed on the manual page.
you can use apache_request_header(); maybe help you.
$headers = apache_request_headers(); foreach ($headers as $header => $value) < echo ""; echo "$header : $value"; echo "
"; >
php : Show the headers received from the browser
So when a browser makes a HTTP request to a server, it is in the form some headers (get/post, cookies, host, User Agent, etc..). Is there a way I can read and display them in a php script? And yes $_GET, $_POST and $_COOKIE are there alright. I was looking for the rest of header info. eg http://pgl.yoyo.org/http/browser-headers.php Thanks.
4 Answers 4
get_headers() function is what you are looking for. As quoted
get_headers — Fetches all the headers sent by the server in response to a HTTP request
$url = 'http://www.example.com'; print_r(get_headers($url));Outputs all the information the send by the server:
[0] => HTTP/1.1 200 OK [1] => Date: Sat, 29 May 2004 12:28:13 GMT [2] => Server: Apache/1.3.27 (Unix) (Red-Hat/Linux) [3] => Last-Modified: Wed, 08 Jan 2003 23:11:55 GMT [4] => ETag: "3f80f-1b6-3e1cb03b" [5] => Accept-Ranges: bytes [6] => Content-Length: 438 [7] => Connection: close [8] => Content-Type: text/html )Update
TO receive the information that is send by browsers, they can be accessed from $_SERVER super global variable. For example, the following snippet gives all the browser related information.
echo $_SERVER['HTTP_USER_AGENT'];- REQUEST_METHOD : gives the HTTP Request method such as GET, HEAD, Put, Post
- HTTP_HOST : gives the HOST information
- HTTP_COOKIE : gives the raw information about the Cookie header [Source]