Replaced mb_convert_encoding with functions from neitanod/forceutf8.

[oliverhermanni]

Hi,

I replaced mb_convert_encoding, as it doesn't work sometimes (see also https://github.com/scotteh/php-goose/issues/69). neitanod/forceutf8 does a good job as a replacement. Never had any problems after that.

Hope, this one is also okay. :)

[scotteh]

Do you have an examples of the failures you mentioned?

[oliverhermanni]

Yes, please check the URL mentioned in the issue at https://github.com/scotteh/php-goose/issues/69.

It's rare, but happened to me on several URLs I can't find right now. Had this fixed for a while, but never uploaded it.

[scotteh]

Thanks for the PR.

I'm a bit wary of adding dependencies if they're not essential. The existing code always attempted to convert even if the encoding wasn't available. Added checks to prevent this which should fix this issue.

Wasn't able to re-create the with the URL mentioned on scotteh/php-goose#69, but that does return a CDN 'browser check' page rather than the actual website contents. It's quite possible a page like this could cause some unusual issues.

If you're still having issues then it might be a matter of using neitanod/forceutf8.

[oliverhermanni]

Yes, I understand that. Maybe a try-catch block would be helpful there so it won't return a 500 as it does now.

[rafwell]

Maybe duplicate #11

[scotteh]

Merged #11 which will hopefully fix these issues without an external dependency.