terbilang

http://blognyasaya-oq.blogspot.com/2012/01/fungsi-terbilang-dengan-php.html
http://www.bengkelprogram.com/data-artikel-226.0.bps
http://budiadiono.blogspot.com/2009/06/fungsi-terbilang-dengan-javascript.html
http://asligresik.wordpress.com/2010/12/03/fungsi-terbilang-dengan-javascript/

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ENKRIP/ DEKRIP
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http://3v4l.org/CArS9
SUMBER: http://naveensnayak.wordpress.com/2013/03/12/simple-php-encrypt-and-decrypt/
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http://3v4l.org/N254s
SUMBER: http://earlysandwich.com/programming/simple-php-encrypt-decrypt-functions-81/