How can I detect Russian spam posts with Perl?

Question

I have an English language forum site written in perl that is continually bombarded with spam in Russian. Is there a way using Perl and regex to detect Russian text so I can block it?

Accepted Answer

You can use the following to detect Cyrillic characters (used in Russian):

```
[\u0400-\u04FF]+
```

If you really just want Russian characters, you can take a look at the aforesaid document, which contains the exact range used for the Basic Russian alphabet which is `[\u0410-\u044F]`. Of course you'd also need to consider extension Cyrillic characters that are used exclusively in Russian -- also mentioned in the document.

How can I detect Russian spam posts with Perl?

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