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Php parse http request headers

Содержание
  1. gonejack / $http_response_header_parser.php
  2. How to Read Request Headers in PHP
  3. Using the getallheaders() Function
  4. Using apache_request_headers() Function
  5. Describing HTTP Headers
  6. http_parse_headers
  7. Examples
  8. See Also
  9. User Contributed Notes 7 notes

gonejack / $http_response_header_parser.php

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/**
* Parse a set of HTTP headers
*
* @param array The php headers to be parsed
* @param [string] The name of the header to be retrieved
* @return A header value if a header is passed;
* An array with all the headers otherwise
*/
function parseHeaders ( array $ headers , $ header = null )
$ output = array ();
if ( ‘HTTP’ === substr( $ headers [ 0 ], 0 , 4 ))
list (, $ output [ ‘status’ ], $ output [ ‘status_text’ ]) = explode( ‘ ‘ , $ headers [ 0 ]);
unset( $ headers [ 0 ]);
>
foreach ( $ headers as $ v )
$ h = preg_split( ‘/:\s*/’ , $ v );
$ output [strtolower( $ h [ 0 ])] = $ h [ 1 ];
>
if ( null !== $ header )
if (isset( $ output [strtolower( $ header )]))
return $ output [strtolower( $ header )];
>
return ;
>
return $ output ;
>

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$http_response_header is a Array like
Array
(
[0] => HTTP/1.1 200 OK
[1] => Date: Thu, 14 Oct 2010 09:46:18 GMT
[2] => Server: Apache/2.2
[3] => Last-Modified: Sat, 07 Feb 2009 16:31:04 GMT
[4] => ETag: «340011c-3614-46256a9e66200»
[5] => Accept-Ranges: bytes
[6] => Content-Length: 13844
[7] => Vary: User-Agent
[8] => Expires: Thu, 15 Apr 2020 20:00:00 GMT
[9] => Connection: close
[10] => Content-Type: image/png
)
which is useful when you what to know the situation being after using the file_get_contents(), but it’s not that easy to get the status code or status text since it’s a wrap of HTTP headers, so here’s a parser(from internet) to make it more easy to get specific header.

Источник

How to Read Request Headers in PHP

When typing a URL in the browser’s address bar and trying to access it, an HTTP request is sent to the server by the browser. It encompasses information in a text-record state including the type, the capabilities, user’s operation system, the browser generating the request, and more.

Getting the request header, the web server sends an HTTP response head to the client.

Below, we will show you how to read any request header in PHP.

Using the getallheaders() Function

To achieve what was described above, you can use the getllheaders() function.

Let’s check out an example with its output:

 foreach (getallheaders() as $name => $value) < echo "$name: $value 
"; > ?>
Host: 127.0.0.3:2025 Connection: keep-alive Cache-Control: max-age=0 Upgrade-Insecure-Requests: 1 User-Agent: Mozilla/5.0 (X11; Linux x86_64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/70.0.3538.67 Safari/537.36 Accept: text/html, application/xhtml+xml, application/xml;q=0.9, image/webp, image/apng, */*;q=0.8 Accept-Encoding: gzip, deflate, br Accept-Language: en-US, en;q=0.9

Using apache_request_headers() Function

Now, let’s check out an example of using another helpful method that is the apache_request_headers() function:

 $header = apache_request_headers(); foreach ($header as $headers => $value) < echo "$headers: $value 
\n"; > ?>

The output will look as follows:

Host: 127.0.0.6:2027 Connection: keep-alive Cache-Control: max-age=0 Upgrade-Insecure-Requests: 1 User-Agent: Mozilla/5.0 (X11; Linux x86_64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/70.0.3538.67 Safari/537.36 Accept: text/html, application/xhtml+xml, application/xml;q=0.9, image/webp, image/apng, */*;q=0.8 Accept-Encoding: gzip, deflate, br Accept-Language: en-US, en;q=0.9

Describing HTTP Headers

An HTTP header is considered a code, which transfers the data between the browser and the web server.

Generally, HTTP headers are used for the communication between the client and the server in both of the directions.

Источник

http_parse_headers

Returns an array on success or FALSE on failure.

Examples

Example #1 Using http_parse_headers()

$headers = «content-type: text/html; charset=UTF-8\r\n» .
«Server: Funky/1.0\r\n» .
«Set-Cookie: foo=bar\r\n» .
«Set-Cookie: baz=quux\r\n» .
«Folded: works\r\n\ttoo\r\n» ;
print_r ( http_parse_headers ( $headers ));
?>

The above example will output:

Array ( [Content-Type] => text/html; charset=UTF-8 [Server] => Funky/1.0 [Set-Cookie] => Array ( [0] => foo=bar [1] => baz=quux ) [Folded] => works too )

See Also

User Contributed Notes 7 notes

The line
$headers [ 0 ] = trim ( $h [ 0 ]); trim ( $h [ 0 ]);
?>
Should be changed to:
$headers [ 0 ] = trim ( $h [ 0 ]);
?>

Taken from http://www.php.net/manual/en/function.http-parse-headers.php#112917 and modified to: make folded work too, return status in first key.

if (! function_exists ( ‘http_parse_headers’ ))
function http_parse_headers ( $raw_headers )
$headers = array();
$key = » ; // [+]

foreach( explode ( «\n» , $raw_headers ) as $i => $h )
$h = explode ( ‘:’ , $h , 2 );

if (isset( $h [ 1 ]))
if (!isset( $headers [ $h [ 0 ]]))
$headers [ $h [ 0 ]] = trim ( $h [ 1 ]);
elseif ( is_array ( $headers [ $h [ 0 ]]))
// $tmp = array_merge($headers[$h[0]], array(trim($h[1]))); // [-]
// $headers[$h[0]] = $tmp; // [-]
$headers [ $h [ 0 ]] = array_merge ( $headers [ $h [ 0 ]], array( trim ( $h [ 1 ]))); // [+]
>
else
// $tmp = array_merge(array($headers[$h[0]]), array(trim($h[1]))); // [-]
// $headers[$h[0]] = $tmp; // [-]
$headers [ $h [ 0 ]] = array_merge (array( $headers [ $h [ 0 ]]), array( trim ( $h [ 1 ]))); // [+]
>

$key = $h [ 0 ]; // [+]
>
else // [+]
< // [+]if ( substr ( $h [ 0 ], 0 , 1 ) == «\t» ) // [+]
$headers [ $key ] .= «\r\n\t» . trim ( $h [ 0 ]); // [+]
elseif (! $key ) // [+]
$headers [ 0 ] = trim ( $h [ 0 ]); trim ( $h [ 0 ]); // [+]
> // [+]
>

$headers = «HTTP/1.1 200 OK\r\n» .
«content-type: text/html; charset=UTF-8\r\n» .
«Server: Funky/1.0\r\n» .
«Set-Cookie: foo=bar\r\n» .
«Set-Cookie: baz=quux\r\n» .
«Folded: works\r\n\ttoo\r\n» ;
print_r ( http_parse_headers ( $headers ));
?>

The above example will output:

Array
(
[0] => HTTP/1.1 200 OK
[content-type] => text/html; charset=UTF-8
[Server] => Funky/1.0
[Set-Cookie] => Array
(
[0] => foo=bar
[1] => baz=quux
)

if (!function_exists(‘http_parse_headers’)) <
function http_parse_headers ($raw_headers) <
$headers = array(); // $headers = [];

foreach (explode(«\n», $raw_headers) as $i => $h) $h = explode(‘:’, $h, 2);

if (isset($h[1])) if(!isset($headers[$h[0]])) $headers[$h[0]] = trim($h[1]);
> else if(is_array($headers[$h[0]])) $tmp = array_merge($headers[$h[0]],array(trim($h[1])));
$headers[$h[0]] = $tmp;
> else $tmp = array_merge(array($headers[$h[0]]),array(trim($h[1])));
$headers[$h[0]] = $tmp;
>
>
>

$headers = «HTTP/1.1 302 Found
Server: nginx
Date: Sat, 27 Apr 2013 08:07:57 GMT
Content-Type: text/html; charset=utf-8
Content-Length: 976
Connection: keep-alive
X-Frame-Options: sameorigin
X-Runtime: 443
Status: 302
Cache-Control: max-age=86400
Expires: Sun, 28 Apr 2013 08:07:56 GMT
Vary: Accept-Encoding,User-Agent
Strict-Transport-Security: max-age=3600 ; includeSubDomains» ;

if (! function_exists ( ‘http_parse_headers’ )) function http_parse_headers ( $raw_headers ) $headers = [];

foreach ( explode ( «\n» , $raw_headers ) as $i => $h ) $h = explode ( ‘:’ , $h , 2 );

if (isset( $h [ 1 ])) $headers [ $h [ 0 ]] = trim ( $h [ 1 ]);
>
>

var_dump ( http_parse_headers ( $headers ));
?>

array(12) [«Server»]=>
string(5) «nginx»
[«Date»]=>
string(29) «Sat, 27 Apr 2013 08:07:57 GMT»
[«Content-Type»]=>
string(24) «text/html; charset=utf-8»
[«Content-Length»]=>
string(3) «976»
[«Connection»]=>
string(10) «keep-alive»
[«X-Frame-Options»]=>
string(10) «sameorigin»
[«X-Runtime»]=>
string(3) «443»
[«Status»]=>
string(3) «302»
[«Cache-Control»]=>
string(13) «max-age=86400»
[«Expires»]=>
string(29) «Sun, 28 Apr 2013 08:07:56 GMT»
[«Vary»]=>
string(26) «Accept-Encoding,User-Agent»
[«Strict-Transport-Security»]=>
string(32) «max-age=3600 ; includeSubDomains»
>

$headers = «content-type: text/html; charset=UTF-8\r\n» .
«Server: Nginx\r\n» .
«set-cookie: user=\r\n\tunknown\r\n» .
«set-cookie: pass=strong\r\n\tpassword\r\n» .
«Set-Cookie: > .
«HOST:github.com» ;

function http_parse_headers ( $raw )
$k = » ;
$out = [];

foreach ( $exp as $v ) $exp = explode ( ‘:’ , $v , 2 );

if (isset( $exp [ 1 ])) /** Сonvert to ‘Word-Word’ */
$k = strtolower ( $exp [ 0 ]);
$k = preg_replace_callback ( ‘/\b[a-z]/’ , function ( $m ) < return strtoupper ( $m [ 0 ]); >, $k );

if (!isset( $out [ $k ])) $out [ $k ] = []; /** for in_array */
if (! in_array ( $value , $out [ $k ])) $out [ $k ][] = $value ; /** New element in array */
> else $value = trim ( $exp [ 0 ]);

$out [ $k ][ $i ] .= «\r\n\t» . $value ;
> elseif (! $k )
$out [ 0 ] = $value ;
>
>

/** Array has only once element — convert in string */
$out = array_map (function ( $v ) < return count ( $v ) < 2 ? $v [ 0 ] : $v ; >, $out );

return $out ;
>
?>

Old function output with error

array ( size = 5 )
‘content-type’ => string ‘text/html; charset=UTF-8’ ( length = 24 )
‘Server’ => string ‘Nginx’ ( length = 5 )
‘set-cookie’ => string ‘Array // Notice: Array to string conversion

password’ ( length = 16 )
‘Set-Cookie’ => string ‘id=1’ ( length = 4 )
‘HOST’ => string ‘github.com’ ( length = 10 )
?>

My function output

array ( size = 4 )
‘Content-Type’ => string ‘text/html; charset=UTF-8’ ( length = 24 )
‘Server’ => string ‘Nginx’ ( length = 5 )
‘Set-Cookie’ =>
array ( size = 3 )
0 => string ‘user=

unknown’ ( length = 15 )
1 => string ‘pass=strong

password’ ( length = 22 )
2 => string ‘id=1’ ( length = 4 )
‘Host’ => string ‘github.com’ ( length = 10 )
?>

If you don’t have access to the PECL library, you can use this code to parse headers contained in strings.

Note that it’s probably not as robust as the PECL version, as it only parses if the headers are separated by newlines (\n). This isn’t a problem in most cases, though, as the standard suggests to use \r\n as the delimiter for headers.

HTTP response code is put into ‘status’.

function http_parse_headers ( $headers = false ) if( $headers === false ) return false ;
>
$headers = str_replace ( «\r» , «» , $headers );
$headers = explode ( «\n» , $headers );
foreach( $headers as $value ) $header = explode ( «: » , $value );
if( $header [ 0 ] && ! $header [ 1 ]) $headerdata [ ‘status’ ] = $header [ 0 ];
>
elseif( $header [ 0 ] && $header [ 1 ]) $headerdata [ $header [ 0 ]] = $header [ 1 ];
>
>
return $headerdata ;
>

$headers = «HTTP/1.1 200 OK\r\n
Date: Tue, 08 Aug 2006 05:32:01 GMT\r\n
X-Powered-By: PHP/4.4.3-dev\r\n
Data 1: Value for Data 1\r\n
Data 2: Value for Data 2\r\n
Connection: close\r\n
Content-Type: text/html\r\n» ;

array( 7 ) [ «status» ]=>
string ( 15 ) «HTTP/1.1 200 OK»
[ «Date» ]=>
string ( 29 ) «Tue, 08 Aug 2006 05:32:01 GMT»
[ «X-Powered-By» ]=>
string ( 13 ) «PHP/4.4.3-dev»
[ «Data 1» ]=>
string ( 16 ) «Value for Data 1»
[ «Data 2» ]=>
string ( 16 ) «Value for Data 2»
[ «Connection» ]=>
string ( 5 ) «close»
[ «Content-Type» ]=>
string ( 9 ) «text/html»
>
?>

This one works even better:

function http_parse_headers ( $header )
$retVal = array();
$fields = explode ( «\r\n» , preg_replace ( ‘/\x0D\x0A[\x09\x20]+/’ , ‘ ‘ , $header ));
foreach( $fields as $field ) if( preg_match ( ‘/([^:]+): (.+)/m’ , $field , $match ) ) $match [ 1 ] = preg_replace ( ‘/(? <=^|[\x09\x20\x2D])./e' , 'strtoupper("\0")' , strtolower ( trim ( $match [ 1 ])));
if( isset( $retVal [ $match [ 1 ]]) ) if (! is_array ( $retVal [ $match [ 1 ]])) $retVal [ $match [ 1 ]] = array( $retVal [ $match [ 1 ]]);
>
$retVal [ $match [ 1 ]][] = $match [ 2 ];
> else $retVal [ $match [ 1 ]] = trim ( $match [ 2 ]);
>
>
>
return $retVal ;
>

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