It was quick and dirty example on how to use it. Frameworks usually expose build... | Hacker News

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hippich on June 25, 2014 | parent | context | favorite | on: Show HN: Replace CAPTCHA with Proof-of-Work

It was quick and dirty example on how to use it. Frameworks usually expose builder function where you can pass query as and array/hash and that should be used. Do you have better example which will be clear about what happening and use pure PHP?

ars on June 25, 2014 [–]

Add:

    if(strspn($_REQUEST['hashcashid'], 'abcdef0123456789-') !=
       strlen($_REQUEST['hashcashid'])
         die('Invalid character.');

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