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Subject: Re: [PHP-DEV] $http_response_header
From: ralph@ralphschindler.com (Ralph Schindler)



On 2/3/15 3:33 AM, Julien Pauli wrote:
> On Mon, Feb 2, 2015 at 6:19 PM, Ferenc Kovacs <tyra3l@gmail.com> wrote:

> About $php_errormsg , we have error_get_last().
> About $http_response_headers, we have no replacement.

Well, we sort of do.  You can get header information from the http 
context stream metadata:

   $fh = fopen($urlPath, 'r', false, $context);
   $metadata = stream_get_meta_data($fh);
   $content = stream_get_contents($fh);
   fclose($fh);

$metadata['wrapper_data'] will include the headers.  From an ease-of-use 
standpoint, $http_reponse_header gives you immediate access to headers 
when the previous operation was a stream based HTTP request (via fopen, 
or even file_get_contents()).

> Why not get rid of both ?
> I mean, those variables magically appearing into your code are born from C,
> where libc usually give access to errno and errstr variables (which are
> often implemented as macros).

We could, but it would be nice to add some kind of easy to use 
replacement for the "last stream operation", which essentially is the 
best/most common use case for $http_response_header after the fact that 
it is magically conjured into local scope.

For example, right now, to get headers from a http stream request, its 
as ease as:

$content = file_get_contents('http://php.net/');
var_dump($http_response_header);

I think a nice replacement for that would be supporting (at least):

$content = file_get_contents('http://php.net/');
$header = stream_get_meta_data()['wrapper_data'];

By passing null to stream_get_meta_data(), it would use metadata from 
the last request made with streams (in the same way 
$http_response_header is allocated).

Thats just a thought for that.  I no other suggestion for the error 
stuff as I'd forgotten that even existed.

-ralph