Guzzle 7 Uncaught Error: Call to undefined function GuzzleHttp\Psr7\stream_for()

[kupoback]

When I attempt to get an access token on the latest version of Guzzle, ^7.3, it errors out giving me the following error:

PHP Fatal error:  Uncaught Error: Call to undefined function GuzzleHttp\Psr7\stream_for() in /path/to/project/vendor/kamermans/guzzle-oauth2-subscriber/src/GrantType/ClientCredentials.php:93
Stack trace:
#0 /path/to/project/vendor/kamermans/guzzle-oauth2-subscriber/src/GrantType/ClientCredentials.php(57): kamermans\OAuth2\GrantType\ClientCredentials->getPostBody()
#1 /path/to/project/vendor/kamermans/guzzle-oauth2-subscriber/src/OAuth2Handler.php(285): kamermans\OAuth2\GrantType\ClientCredentials->getRawData(Object(kamermans\OAuth2\Signer\ClientCredentials\BasicAuth))
#2 /path/to/project/vendor/kamermans/guzzle-oauth2-subscriber/src/OAuth2Handler.php(213): kamermans\OAuth2\OAuth2Handler->requestNewAccessToken()
#3 /path/to/project/public/FileName.php(230): kamermans\OAuth2\OAuth2Handler->getAccessTo in /path/to/project/vendor/kamermans/guzzle-oauth2-subscriber/src/GrantType/ClientCredentials.php on line 93

This is the method I've written, maybe I did something wrong, but dropping the Guzzle version to the latest v6, it works:

protected function grabToken()
{
    $client_id     = env("CLIENT_ID");
    $client_secret = env("CLIENT_SECRET");

    try {
        $reauth_client = new Client(['base_uri' => 'https://URL.com/auth/connect/token',]);

        $reauth_config = [
            'client_id'     => $client_id,
            'client_secret' => $client_secret,
        ];

        $grant_type = new ClientCredentials($reauth_client, $reauth_config);
        $refresh_gt = new RefreshToken($reauth_client, $reauth_config);
        $oauth      = new OAuth2Middleware($grant_type, $refresh_gt);

        error_log(print_r($oauth->getAccessToken(), true)); // This is me checking the token's existence

        return $oauth;
    }
    catch (\Exception $exception) {
        return rest_ensure_response($exception->getMessage());
    }
}

[MattApril]

I fixed it by downgrading guzzlehttp/psr version.

composer require guzzlehttp/psr7:^1.7

[stsepelin]

I fixed it by changing stream_for to Utils::streamFor in ClientCredentials.

[kamermans]

Thanks @stsepelin, indeed it is deprecated.

Looking at the code, I see stream_for became and alias for Utils::streamFor and deprecated in Guzzle\Psr7 v1.7.0:

/** @deprecated stream_for will be removed in guzzlehttp/psr7:2.0. Use Utils::streamFor instead.
 */
function stream_for($resource = '', array $options = [])
{
    return Utils::streamFor($resource, $options);
}

I'll put in a conditional to resolve this. Thanks for reporting this @kupoback!

[kamermans]

I've released the fix for this issue in v1.0.10.