Fixed for more recent versions of SimpleSAMLphp

[infostreams]

Newer versions of SimpleSAMLphp don't have the SimpleSAML_autoload function anymore.

[asasmoyo]

Wow thanks for the PR!
Have you test this on your side? Sorry I do not maintain Yii app with Simplesamlphp anymore so I can't test it.

[infostreams]

Yeah, without this code it doesn't work on my side. The reason being that the function SimpleSAML_autoload doesn't exist anymore in newer versions of SimpleSAMLphp. What this code does is

• First it checks if the function SimpleSAML_autoload exists anyway. If it exists, it does the exact same thing it did before, so there's no change in functionality.
• If the function does not exist, it checks if Composer added an autoload class, and then registers that autoload class with Yii. This is the new codepath that I needed to add for my situation. Otherwise, it wouldn't start the authentication flow and my application wouldn't authenticate with the identity provider (I'd get a fatal error about a non-existing function SimpleSAML_autoload instead)

So yes, it is tested. With this code it works in newer versions of SimpleSAML. Without this code, it doesn't.

[asasmoyo]

Nice!
Thanks a lot. Will merge it.