PHP Spam Detection : Detect spam in comments and text messages

This class can detect spam in comments and text messages.

It can analyze a given comment text and see if it contains words often used in spam messages.

It can also detect if the text has URLs and whether the URLs have words often found in spam page URLs.

The class computes a score based on the presence of spam factors and returns to the application that can treat the message as spam if the score is above a given threshold.