所以我遇到了類似的問題,當我在幾天前在php做一些加密。我需要將一個十進制數字轉換爲二進制數字。我所做的是將其轉換爲十六進制,然後將其解壓爲十六進制編碼數據。
<?php
$a = pack("H*", convBase('6465130539297209249500692895930266194225707667564124686892613724438982507603215802636578141547940687986170708901198917318074984831856438115515743080726101', '', 'ABCDEF'));
function convBase($numberInput, $fromBaseInput, $toBaseInput)
{
if ($fromBaseInput==$toBaseInput) return $numberInput;
$fromBase = str_split($fromBaseInput,1);
$toBase = str_split($toBaseInput,1);
$number = str_split($numberInput,1);
$fromLen=strlen($fromBaseInput);
$toLen=strlen($toBaseInput);
$numberLen=strlen($numberInput);
$retval='';
if ($toBaseInput == '')
{
$retval=0;
for ($i = 1;$i <= $numberLen; $i++)
$retval = bcadd($retval, bcmul(array_search($number[$i-1], $fromBase),bcpow($fromLen,$numberLen-$i)));
return $retval;
}
if ($fromBaseInput != '')
$base10=convBase($numberInput, $fromBaseInput, '');
else
$base10 = $numberInput;
if ($base10<strlen($toBaseInput))
return $toBase[$base10];
while($base10 != '0')
{
$retval = $toBase[bcmod($base10,$toLen)].$retval;
$base10 = bcdiv($base10,$toLen,0);
}
return $retval;
}
?>
我瘦我可能誤解了你的問題... – 2011-12-16 07:58:28