Update OpenIDConnectClient.php

[massej]

Fix issue with Azure B2C that already use a parameter.

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• Changelog entry is added or the pull request don't alter library's functionality

[DeepDiver1975]

We should add a unit test on this .....

[massej]

@DeepDiver1975 How to add unit test in this project?

the test case would be https://test.com/user_info_endpoint then it would add ?schema= with a ?

if it’s an url that already has parameter like
https://test.com/user_info_endpoint?policy=b2ctest

then it would add &schema= with the &

[ricklambrechts]

Currently we use this implementation for the auth endpoint, so I think it would be nice to use the same logic instead of using parse_url.

OpenID-Connect-PHP/src/OpenIDConnectClient.php

Line 792 in 7be38be

$auth_endpoint .= (strpos($auth_endpoint, '?') === false ? '?' : '&') . http_build_query($auth_params, '', '&', $this->encType);