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Class: Hippo Chinese Cert Code


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      Classes of DavidLanz  >  Hippo Chinese Cert Code  >  Download  >  Support forum Support forum  >  RSS 1.0 feed RSS 2.0 feed Latest changes  >  Stumble It! Stumble It!  >  Bookmark in del.icio.us Bookmark in del.icio.us  
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  • Screenshots:

    Demo
    File Role Description
    Accessible without login Image file Hippo_Chinese_Cert_Code.jpg Screen Demo

  • Supplied by:

    Picture of DavidLanz
    Name: DavidLanz <e-mail contact>
    Published packages: 5
    Country: Taiwan Taiwan - PHP jobs in Taiwan
    Home page: http://shop.teac.idv.tw/mywork/
    Age: ???
    All time rank: 170
    Week rank: 146

    Browse this author's classes

  • Innovation Award:

    PHP Programming Innovation award nominee
    May 2006
    Number 7
    		 CAPTCHA is an acronym for a group of techniques that are used for preventing the access of automated programs to protected Web site pages that are meant only for real human users.

    The most common form of CAPTCHA validation employs the use of fuzzy images with a few text characters that the user must enter correctly to have access to the protected pages.

    This class implements a variant of the image based CAPTCHA validation solutions. It renders Chinese characters instead of the usual ASCII characters.

    This is a better solution to protect the access to pages that are meant only for human users that can read Chinese text.

    Manuel Lemos

  • Groups:

    Group folder image Graphics Colors, images, charts and picture formats View top rated classes
    Group folder image Validation Validation algorithms View top rated classes

  • Detailed description:

    This class can be used to generate CAPTCHA validation images using Chinese words.

    The class picks random words from a file with a list of Chinese words represented in the big5 encoding.

    The picked word is stored in a session variable so it can be compared with what the user entered in a form later.

    The words are rendered in an image using an appropriate True-Type font. The words may be rendered over a given background image.

    The generated image is served in the PNG format as part of the current script output.

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  • Applications that use this class:

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  • Files:

    File Role Description
    Image file background.gif Photo simple background picture
    Plain text file check.php Example Demo: compare input string and the correct one
    Plain text file cht_str.php Data some Chinese words
    Plain text file hippo_chinese_cert_code.php Class main Hippo_Chinese_Cert_Code class
    Plain text file hippo_sample_image.php Aux. this is where we generate pictures
    Plain text file index.php Aux. run demo from here!!!
    Plain text file INSTALL Doc. the file u're reading
    Plain text file README Lic. summary of this class
    Download all files: chinese_cert_code.tar.gz chinese_cert_code.zip
    NOTICE: if you are using a download manager program like 'GetRight', please Login before trying to download this archive.

 
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