Packages of Marco van Oostende
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| All class groups | > | All authors | > | Packages of Marco van Oostende (2) | > | Mission progress status | > | Reputation |
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| This class can be used to generate ean-13 bar code images using a TrueType font. It takes a bar code number and renders the corresponding bars and code numbers and the checksum using a TrueType font specific for rendering bar codes with the ean-13 standard. The generated bar code image is served as the current script output in the PNG format. |
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| This class can be used to make it difficult for robots to write spam in forums, contact forms etc. It uses a form parameter with a 'random' hash that is used in both the form page and de processing page. It can be used in links and forms. The links or forms that process the hashed parameters can verify the hash and only allow to proceed if the hash of the current date matches the followed URL hash parameter. This may help preventing that robots to spam forums, guestbooks and blogs. |
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