Php generates a fixed-length pure digital encoding

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. None? Php *** generated by date or given prefix

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. None? Php/*** generated by date or given prefix

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. <无>

  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 and unique encoding according to the id * @ param $ id Number * @ param int $ prefix * @ param int $ width length except the prefix * @ 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 component. ** @ 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 the 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 ));}}