Even with a strong Captcha system in place, you will still find users trying to manually spam your web site. They tend to be people who discover your site through a very specific search engine query, for which they would like their own site to also rank well, and they hope that by adding a link back to their site from yours this will happen. Using this recipe, you can specify a set of keywords that will trigger spam detection, and then use the level of spam certainty returned by the function to decide whether to ignore a user post. https://www.chat-to.dev/post?id=11 #php #programming

  • noroute@lemmy.worldEnglish
    3·
    11 months ago

    Never trust user input on site, always properly sanitize it. There are many auto bots that break captcha and inject the code.

    • abhibeckert@lemmy.worldEnglish
      1·
      11 months ago

      Sure… But assuming you’re running a business, and you want potential future customers to be able to reach you… then you need some sort of contact form, and you’ll get spam on that form which is annoying.

      • noroute@lemmy.worldEnglish
        1·
        11 months ago

        You can avoid a lot of spam by using blacklists of ips. See spamhouse blacklists for example. Also log all users ips who contact you in case you need to block them for spamming.