Author Archives: Paul Butler

A simple diff algorithm in PHP

Posted on May 15, 2007 by Paul Butler

A diff algorithm in its most basic form takes two strings, and returns the changes needed to make the old string into the new one. They are useful in comparing different versions of a document or file, to see at … Continue reading →

Posted in PHP | 51 Comments

JSSpamBlock 1.4

Posted on April 18, 2007 by Paul Butler

Update: Due to lack of time and interest (on my part), I am no longer maintaining JSSpamBlock or ImageScaler. It must look like JSSpamBlock is all I have been working on these days, which is the opposite of true. I … Continue reading →

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JSSpamBlock 1.3

Posted on April 2, 2007 by Paul Butler

Update: Due to lack of time and interest (on my part), I am no longer maintaining JSSpamBlock or ImageScaler. A user of JSSpamBlock found a bug which is rather undesirable; it incorrectly assumes that comments are spam if a new … Continue reading →

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JSSpamBlock 1.2

Posted on April 1, 2007 by Paul Butler

Update: Due to lack of time and interest (on my part), I am no longer maintaining JSSpamBlock or ImageScaler. I have made a few small changes to JSSpamBlock, my WordPress spam detection plugin. I found that the plugin had some … Continue reading →

Posted in JSSpamBlock, JavaScript, WordPress | Leave a comment

Preventing Comment Spam with JavaScript bot detection

Posted on March 22, 2007 by Paul Butler

Update: Due to lack of time and interest (on my part), I am no longer maintaining JSSpamBlock or ImageScaler. I got my first comment spam on this blog the other day. It inspired me to try an idea I got … Continue reading →

Posted in JSSpamBlock, JavaScript, WordPress | 19 Comments

webFractal: Web-based Fractal Explorer

Posted on February 17, 2007 by Paul Butler

Last weekend, I won a nice new Toshiba laptop in a local software competition. My entry was a web-based fractal explorer. I had a lot of fun making it, and it is fun to play with as well. I have … Continue reading →

Posted in Fractals, Java, Math, Web Apps | Leave a comment