mrzebra81 Posted September 30, 2011 Share Posted September 30, 2011 Is there any way to prevent bots from getting past a math captcha? I have 2 numbers generated randomly (from 1 to 20) and they are displayed in an image with the following lines: one going from the upper left corner to the lower right corner one going from the upper right to the lower left a vertical line in the middle of the image and a horizontal line in the middle.... Now I keep getting bots posting on my comments page every few weeks...is there a more effective method I should try in order to stop this? I have the answer stored in a session variable. I was going to try random numbers from (1 to 100). I also have a php counter on my webpage that has a file that the number of hits is written to and it seems everytime the bots post get past my captcha, the number of hits in the file is overridden. (It will go from 538 views down to 10 views).... Any ideas??? Link to comment https://forums.phpfreaks.com/topic/248153-bots-getting-past-math-captcha/ Share on other sites More sharing options...
Freedom-n-Democrazy Posted September 30, 2011 Share Posted September 30, 2011 Make an image with text distorted enough for an CR capable bot not being able to make it out, and set a static answer for it. Link to comment https://forums.phpfreaks.com/topic/248153-bots-getting-past-math-captcha/#findComment-1274264 Share on other sites More sharing options...
Kaboom Posted September 30, 2011 Share Posted September 30, 2011 Use reCAPTCHA, it works really good for stopping them Link to comment https://forums.phpfreaks.com/topic/248153-bots-getting-past-math-captcha/#findComment-1274267 Share on other sites More sharing options...
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