PHP Sub-database table hash Algorithm _php Tutorial

Copy CodeThe code is as follows:
The algorithm of sub-database sub-table
function calc_hash_db ($u, $s = 4)
{
$h = sprintf ("%u", CRC32 ($u));
$h 1 = intval (Fmod ($h, $s));
return $h 1;
}


for ($i =1; $i <100; $i + +)
{
echo calc_hash_db ($i);
echo "
";
}

function Calc_hash_tbl ($u, $n = $m = 16)
{
$h = sprintf ("%u", CRC32 ($u));
$h 1 = intval ($h/$n);
$h 2 = $h 1 $n;
$h 3 = Base_convert ($h 2, ten, $m);
$h 4 = sprintf ("%02s", $h 3);
return $h 4;
}

http://www.bkjia.com/PHPjc/320858.html www.bkjia.com true http://www.bkjia.com/PHPjc/320858.html techarticle Copy the code as follows://Sub-list algorithm function calc_hash_db ($u, $s = 4) {$h = sprintf ("%u", CRC32 ($u)); $h 1 = intval (Fmod ($h, $s)); RET Urn $h 1; } for ($i =1; $i, $i + +) {...

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