PHP database/table sharding Hash Algorithm

CopyCodeThe Code is as follows: // database/table sharding Algorithm
Function calc_hash_db ($ U, $ S = 4)
{
$ H = sprintf ("% u", CRC32 ($ u ));
$ H1 = intval (fmod ($ H, $ s ));
Return $ H1;
}

For ($ I = 1; I I <100; $ I ++)
{
Echo calc_hash_db ($ I );
Echo "<br> ";
}

Function calc_hash_tbl ($ U, $ n = 256, $ M = 16)
{
$ H = sprintf ("% u", CRC32 ($ u ));
$ H1 = intval ($ H/$ N );
$ H2 = $ H1 % $ N;
$ H3 = base_convert ($ H2, 10, $ m );
$ H4 = sprintf ("% 02 s", $ H3 );
Return $ H4;
}