Php method for generating fixed-length pure digital encoding

Php method for generating fixed-length pure digital encoding

This example describes how to generate a fixed-length, pure-digit code using php. Share it with you for your reference. The details are as follows: In many cases, we need some fixed-length numbers, such as order numbers, card numbers, and user numbers! However, we often have sequential numbers stored in the database. we can convert them into a fixed-length numeric code and update them to the database to form a unique number for this record. /** * Generate a unique ID based on the date or given prefix * User: minyifei.cn * Date: 15/7/7 */ Namespace Minyifei \ Libs; Class SequenceNumber { /** * Obtain the specified mapbit based on the display width. * * @ Param integer $ width number: display width * * @ Return array */ Private static function _ getMapbit ($ width) { $ MapBits = array ( 4 => array ( 10, 2, 11, 3, 0, 1, 9, 7, 12, 6, 4, 8, 5, ), 5 => array ( 4, 3, 13, 15, 7, 8, 6, 2, 1, 10, 5, 12, 0, 11, 14, 9, ), 6 => array ( 2, 7, 10, 9, 16, 3, 6, 8, 0, 4, 1, 12, 11, 13, 18, 5, 15, 17, 14, ), 7 => array ( 18, 0, 2, 22, 8, 3, 1, 14, 17, 12, 4, 19, 11, 9, 13, 5, 6, 15, 10, 16, 20, 7, 21, ), 8 => array ( 11, 8, 4, 0, 16, 14, 22, 7, 3, 5, 13, 18, 24, 25, 23, 10, 1, 12, 6, 21, 17, 2, 15, 9, 19, 20, ), 9 => array ( 24, 23, 27, 3, 9, 16, 25, 13, 28, 12, 0, 4, 10, 18, 11, 2, 17, 1, 21, 26, 5, 15, 7, 20, 22, 14, 19, 6, 8, ), 10 => array ( 32, 3, 1, 28, 21, 18, 30, 7, 12, 22, 20, 13, 16, 15, 6, 17, 9, 25, 11, 8, 4, 27, 14, 31, 5, 23, 24, 29, 0, 10, 19, 26, 2, ), 11 => array ( 9, 13, 2, 29, 11, 32, 14, 33, 24, 8, 27, 4, 22, 20, 5, 0, 21, 25, 17, 28, 34, 6, 23, 26, 30, 3, 7, 19, 16, 15, 12, 31, 1, 35, 10, 18, ), 12 => array ( 31, 4, 16, 33, 35, 29, 17, 37, 12, 28, 32, 22, 7, 10, 14, 26, 0, 9, 8, 3, 20, 2, 13, 5, 36, 27, 23, 15, 19, 34, 38, 11, 24, 25, 30, 21, 18, 6, 1, ), ); Return $ mapBits [intval ($ width)]; } /** * Format the given timestamp * * @ Param integer $ ts timestamp, if null use current timestamp * * @ Return string */ Private static function _ fmtTS ($ ts = null) { $ Ts = $ ts? : Time (); Return date (self ::$ _ fmt, $ ts ); } /** * Obtain a random unique encoding based on the id. * @ Param $ id * @ Param int $ prefix * @ Param int $ width except the prefix length * @ Return string */ Public static function generateNumber ($ id, $ prefix = 10, $ width = 8) { Return sprintf ("% s", $ prefix, self: encode ($ id, $ width )); } /** * Encoding conversion * * @ Param integer $ id * @ Param integer $ width indicates the display width of the additional components. * * @ Return integer */ Public static function encode ($ id, $ width) { $ Maximum = intval (str_repeat (9, $ width )); $ Superscript = intval (log ($ maximum)/log (2 )); $ R = 0; $ Sign = 0x1 <$ superscript; $ Id | = $ sign; $ Mapbit = self: _ getMapbit ($ width ); For ($ x = 0; $ x <$ superscript; $ x ++ ){ $ V = ($ id >>$ x) & 0x1; $ R | = ($ v <$ mapbit [$ x]); } $ R + = $ maximum-pow (2, $ superscript) + 1; Return sprintf ("% 0 $ {width} s", $ r ); } /** * Obtain a unique ID * * @ Param integer $ id, mostly database primary key * @ Param integer $ width number: display width * @ Param integer $ ts timestamp * * @ Return string */ Public static function get ($ id, $ width, $ ts = null) { Return sprintf ('% s % s', self: _ fmtTS ($ ts), self: encode ($ id, $ width )); } } I hope this article will help you with php programming.

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