Posts Tagged spam

A Pointless Update?

This is a pointless update.

I haven’t updated this blog for over a month. Google likes it when I update frequently. So I’m doing a pointless update to see what Google does. Last year I started updating the blog every two weeks and have noticed a huge increase in search traffic since then (anecdotal evidence I know, but controlled experiments on SEO are difficult).

Now my updates are less frequent, my traffic has dipped a little again. So I’m hoping that this update will cause my traffic to increase again.

So it’s not really a pointless update, it’s part of an experiment to see how Google responds. And in fact, I’ve actually managed to turn this into a vaguely interesting post about search engines after all, so the experiment is probably hopeless flawed. But read on if you’re interested in some chatter about how search engines like Google actually work.
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Anti-Spam Email PNG

This is a simple way to display your email without fear of it getting picked up by spammers; it creates an image of the email address you send it. To be honest, I don’t think in this day and age spammers spend huge amounts of time trawling through gigs of websites looking for email addresses so all this “howard DOT yeend AT gmail DOT com” stuff I think is largely futile – have you experienced a drop in spam since obfuscating your address like that? Thought not. But hey, if you want to see how to write strings in PHP, check out the code :) Read the rest of this entry »

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Breaking CAPTCHA without OCR

Breaking CAPTCHAs Without Using OCR
For my own PHP CAPTCHA implementation, click here.

This article details a method I have discovered to bypass CAPTCHA security, without having to use Optical Character Recognition software. It depends on an implementation problem that was quite common among CAPTCHA scripts when I originally published this in May 2005.
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free PHP CAPTCHA v1.4.1

freecap PHP Captcha

freeCap is a GPL CAPTCHA script to stop spam. It was written as a proof-of-concept at a time when there were really no other good PHP captcha scripts around (2005). For a long time I think it’s not untrue to say freeCap was the best PHP CAPTCHA there was.

To be perfectly honest, these days I would recommend you try reCAPTCHA first. freeCap does still do the job perfectly well, but the reCAPTCHA guys can provide better support than I.

Still, freeCap might be the solution for you if you want to be able to have more control over how the CAPTCHA works and is displayed. There are a whole load of tweakable options: multiple GD fonts, colours, backgrounds, obfuscation options etc. And the code is pretty good too if you’re just interested in PHP image processing. Still interested? Read on!

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Free PHP Scripts / Web Projects

Various PHP projects of mine, with free GPL source code.

Mostly, these are small PHP/mySQL applications that provide an equally small piece of functionality. Source code is available under the GPL in most cases. Read the rest of this entry »

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