php实现十进制、三十六进制转换的函数

/**
* 进制转换：十进制、三十六进制转换
* by bbs.it-home.org
*/
$dic = array(
0 => '0', 1 => '1', 2 => '2', 3 => '3', 4 => '4', 5 => '5', 6 => '6', 7 => '7', 8 => '8', 9 => '9',
10 => 'A', 11 => 'B', 12 => 'C', 13 => 'D', 14 => 'E', 15 => 'F', 16 => 'G', 17 => 'H', 18 => 'I',
19 => 'J', 20 => 'K', 21 => 'L', 22 => 'M', 23 => 'N', 24 => 'O', 25 => 'P', 26 => 'Q', 27 => 'R',
28 => 'S', 29 => 'T', 30 => 'U', 31 => 'V', 32 => 'W', 33 => 'X', 34 => 'Y', 35 => 'Z'
);
//十进制转换三十六进制
function enid($int, $format = 8) {
global $dic;
$arr = array();
$loop = true;
while ($loop)
{
$arr[] = $dic[bcmod($int, 36)];
$int = floor(bcdiv($int, 36));
if ($int == 0) {
$loop = false;
}
}
array_pad($arr, $format, $dic[0]);
return implode('', array_reverse($arr));
}
//三十六进制转换十进制
function deid($id) {
global $dic;
// 键值交换
$dedic = array_flip($dic);
// 去零
$id = ltrim($id, $dic[0]);
// 反转
$id = strrev($id);
$v = 0;
for($i = 0, $j = strlen($id); $i {
$v = bcadd(bcmul($dedic[$id{$i}] , bcpow(36, $i)) , $v);
}
return $v;
}
// 遍历三位所有的三十六进制数
$i = deid('ZZZ');
$b = array();
while ($i > 0) {
$id_dym = str_pad(enid($i), 3, 0, STR_PAD_LEFT);
echo strtolower($id_dym), '
';
$i--;
}