contents of $http_response_header is incorrect with long http message

[fasterforward]

Description

The following code:

echo file_get_contents('https://secret.blob.core.windows.net/container/documents/899/00000898942?si=secret&spr=https&sv=2021-06-08&sr=c&sig=secret');

print_r($http_response_header);

Resulted in this output:

Array
(
    [0] => HTTP/1.1 403 Server failed to authenticate the request. Make sure the value of Authorization header is formed correctly includ
    [1] => ing the signature.
    [2] => Content-Length: 544
    [3] => Content-Type: application/xml
    [4] => Server: Microsoft-HTTPAPI/2.0
    [5] => x-ms-request-id: 62435059-d01e-0017-2c51-aea046000000
    [6] => x-ms-error-code: AuthenticationFailed
    [7] => Date: Fri, 12 Aug 2022 13:45:53 GMT
    [8] => Connection: close
)

But I expected this output instead:

Array
(
    [0] => HTTP/1.1 403 Server failed to authenticate the request. Make sure the value of Authorization header is formed correctly including the signature.
    [1] => Content-Length: 544
    [2] => Content-Type: application/xml
    [3] => Server: Microsoft-HTTPAPI/2.0
    [4] => x-ms-request-id: 62435059-d01e-0017-2c51-aea046000000
    [5] => x-ms-error-code: AuthenticationFailed
    [6] => Date: Fri, 12 Aug 2022 13:45:53 GMT
    [7] => Connection: close
)

Here are the raw response headers according to network tab of FireFox:

HTTP/1.1 403 Server failed to authenticate the request. Make sure the value of Authorization header is formed correctly including the signature.
Content-Length: 544
Content-Type: application/xml
Server: Microsoft-HTTPAPI/2.0
x-ms-request-id: d9fdcb88-f01e-0022-4551-ae0e13000000
x-ms-error-code: AuthenticationFailed
Date: Fri, 12 Aug 2022 13:42:57 GMT

PHP Version

PHP 8.1

Operating System

No response

[damianwadley]

Allowing more than 127 characters, like 255 is a nice round number, seems reasonable, but that status line is only supposed to have a short descriptive reason for the code. It is not the place for error messages. So tsk tsk, Microsoft.

[cmb69]

I have to agree that the reason-phrase is unnecessarily verbose, but to my knowledge there is no actual length restriction, so we should probably comply.